mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-06-29 16:09:23 +02:00
3ee8f505b7
The main benefit of this is so that authors who make use of
.editorconfig don't end up with whitespace changes in their PRs.
Spaces vs. tabs has been left alone, although that could do with a
tidy-up in SS4 after the switch to PSR-1/2.
The command used was this:
for match in '*.ss' '*.css' '*.scss' '*.html' '*.yml' '*.php' '*.js' '*.csv' '*.inc' '*.php5'; do
find . -path ./thirdparty -not -prune -o -path ./admin/thirdparty -not -prune -o -type f -name "$match" -exec sed -E -i '' 's/[[:space:]]+$//' {} \+
find . -path ./thirdparty -not -prune -o -path ./admin/thirdparty -not -prune -o -type f -name "$match" | xargs perl -pi -e 's/ +$//'
done
449 lines
13 KiB
PHP
449 lines
13 KiB
PHP
<?php
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/**
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* Library of conversion functions, implemented as static methods.
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*
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* The methods are all of the form (format)2(format), where the format is one of
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*
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* raw: A UTF8 string
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* attr: A UTF8 string suitable for inclusion in an HTML attribute
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* js: A UTF8 string suitable for inclusion in a double-quoted javascript string.
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*
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* array: A PHP associative array
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* json: JavaScript object notation
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*
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* html: HTML source suitable for use in a page or email
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* text: Plain-text content, suitable for display to a user as-is, or insertion in a plaintext email.
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*
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* Objects of type {@link ViewableData} can have an "escaping type",
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* which determines if they are automatically escaped before output by {@link SSViewer}.
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*
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* @package framework
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* @subpackage misc
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*/
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class Convert {
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/**
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* Convert a value to be suitable for an XML attribute.
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*
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* @param array|string $val String to escape, or array of strings
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* @return array|string
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*/
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public static function raw2att($val) {
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return self::raw2xml($val);
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}
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/**
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* Convert a value to be suitable for an HTML attribute.
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*
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* @param string|array $val String to escape, or array of strings
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* @return array|string
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*/
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public static function raw2htmlatt($val) {
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return self::raw2att($val);
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}
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/**
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* Convert a value to be suitable for an HTML ID attribute. Replaces non
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* supported characters with a space.
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*
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* @see http://www.w3.org/TR/REC-html40/types.html#type-cdata
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*
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* @param array|string $val String to escape, or array of strings
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*
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* @return array|string
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*/
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public static function raw2htmlname($val) {
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if(is_array($val)) {
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foreach($val as $k => $v) {
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$val[$k] = self::raw2htmlname($v);
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}
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return $val;
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} else {
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return self::raw2att($val);
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}
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}
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/**
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* Convert a value to be suitable for an HTML ID attribute. Replaces non
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* supported characters with an underscore.
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*
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* @see http://www.w3.org/TR/REC-html40/types.html#type-cdata
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*
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* @param array|string $val String to escape, or array of strings
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*
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* @return array|string
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*/
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public static function raw2htmlid($val) {
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if(is_array($val)) {
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foreach($val as $k => $v) {
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$val[$k] = self::raw2htmlid($v);
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}
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return $val;
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} else {
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return trim(preg_replace(
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'/_+/', '_', preg_replace('/[^a-zA-Z0-9\-_:.]+/','_', $val)),
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'_'
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);
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}
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}
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/**
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* Ensure that text is properly escaped for XML.
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*
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* @see http://www.w3.org/TR/REC-xml/#dt-escape
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* @param array|string $val String to escape, or array of strings
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* @return array|string
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*/
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public static function raw2xml($val) {
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if(is_array($val)) {
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foreach($val as $k => $v) $val[$k] = self::raw2xml($v);
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return $val;
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} else {
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return htmlspecialchars($val, ENT_QUOTES, 'UTF-8');
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}
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}
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/**
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* Ensure that text is properly escaped for Javascript.
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*
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* @param array|string $val String to escape, or array of strings
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* @return array|string
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*/
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public static function raw2js($val) {
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if(is_array($val)) {
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foreach($val as $k => $v) $val[$k] = self::raw2js($v);
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return $val;
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} else {
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return str_replace(
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// Intercepts some characters such as <, >, and & which can interfere
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array("\\", '"', "\n", "\r", "'", "<", ">", "&"),
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array("\\\\", '\"', '\n', '\r', "\\'", "\\x3c", "\\x3e", "\\x26"),
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$val
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);
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}
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}
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/**
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* Encode a value as a JSON encoded string.
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*
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* @param mixed $val Value to be encoded
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* @return string JSON encoded string
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*/
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public static function raw2json($val) {
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return json_encode($val);
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}
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/**
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* Encode an array as a JSON encoded string.
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* THis is an alias to {@link raw2json()}
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*
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* @param array $val Array to convert
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* @return string JSON encoded string
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*/
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public static function array2json($val) {
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return self::raw2json($val);
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}
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/**
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* Safely encodes a value (or list of values) using the current database's
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* safe string encoding method
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*
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* @param mixed|array $val Input value, or list of values as an array
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* @param boolean $quoted Flag indicating whether the value should be safely
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* quoted, instead of only being escaped. By default this function will
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* only escape the string (false).
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* @return string|array Safely encoded value in the same format as the input
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*/
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public static function raw2sql($val, $quoted = false) {
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if(is_array($val)) {
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foreach($val as $k => $v) {
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$val[$k] = self::raw2sql($v, $quoted);
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}
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return $val;
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} else {
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if($quoted) {
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return DB::get_conn()->quoteString($val);
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} else {
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return DB::get_conn()->escapeString($val);
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}
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}
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}
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/**
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* Safely encodes a SQL symbolic identifier (or list of identifiers), such as a database,
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* table, or column name. Supports encoding of multi identfiers separated by
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* a delimiter (e.g. ".")
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*
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* @param string|array $identifier The identifier to escape. E.g. 'SiteTree.Title'
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* @param string $separator The string that delimits subsequent identifiers
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* @return string|array The escaped identifier. E.g. '"SiteTree"."Title"'
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*/
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public static function symbol2sql($identifier, $separator = '.') {
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if(is_array($identifier)) {
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foreach($identifier as $k => $v) {
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$identifier[$k] = self::symbol2sql($v, $separator);
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}
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return $identifier;
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} else {
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return DB::get_conn()->escapeIdentifier($identifier, $separator);
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}
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}
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/**
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* Convert XML to raw text.
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* @uses html2raw()
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* @todo Currently &#xxx; entries are stripped; they should be converted
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*/
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public static function xml2raw($val) {
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if(is_array($val)) {
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foreach($val as $k => $v) $val[$k] = self::xml2raw($v);
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return $val;
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} else {
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// More complex text needs to use html2raw instead
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if(strpos($val,'<') !== false) return self::html2raw($val);
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else return html_entity_decode($val, ENT_QUOTES, 'UTF-8');
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}
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}
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/**
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* Convert a JSON encoded string into an object.
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*
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* @param string $val
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* @return object|boolean
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*/
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public static function json2obj($val) {
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return json_decode($val);
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}
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/**
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* Convert a JSON string into an array.
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*
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* @uses json2obj
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* @param string $val JSON string to convert
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* @return array|boolean
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*/
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public static function json2array($val) {
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return json_decode($val, true);
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}
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/**
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* Converts an XML string to a PHP array
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* See http://phpsecurity.readthedocs.org/en/latest/Injection-Attacks.html#xml-external-entity-injection
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*
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* @uses recursiveXMLToArray()
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* @param string $val
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* @param boolean $disableDoctypes Disables the use of DOCTYPE, and will trigger an error if encountered.
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* false by default.
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* @param boolean $disableExternals Disables the loading of external entities. false by default.
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* @return array
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*/
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public static function xml2array($val, $disableDoctypes = false, $disableExternals = false) {
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// Check doctype
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if($disableDoctypes && preg_match('/\<\!DOCTYPE.+]\>/', $val)) {
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throw new InvalidArgumentException('XML Doctype parsing disabled');
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}
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// Disable external entity loading
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if($disableExternals) $oldVal = libxml_disable_entity_loader($disableExternals);
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try {
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$xml = new SimpleXMLElement($val);
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$result = self::recursiveXMLToArray($xml);
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} catch(Exception $ex) {
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if($disableExternals) libxml_disable_entity_loader($oldVal);
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throw $ex;
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}
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if($disableExternals) libxml_disable_entity_loader($oldVal);
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return $result;
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}
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/**
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* Convert a XML string to a PHP array recursively. Do not
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* call this function directly, Please use {@link Convert::xml2array()}
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*
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* @param SimpleXMLElement
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*
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* @return mixed
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*/
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protected static function recursiveXMLToArray($xml) {
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if(is_object($xml) && get_class($xml) == 'SimpleXMLElement') {
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$attributes = $xml->attributes();
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foreach($attributes as $k => $v) {
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if($v) $a[$k] = (string) $v;
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}
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$x = $xml;
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$xml = get_object_vars($xml);
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}
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if(is_array($xml)) {
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if(count($xml) == 0) return (string) $x; // for CDATA
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foreach($xml as $key => $value) {
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$r[$key] = self::recursiveXMLToArray($value);
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}
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if(isset($a)) $r['@'] = $a; // Attributes
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return $r;
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}
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return (string) $xml;
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}
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/**
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* Create a link if the string is a valid URL
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*
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* @param string $string The string to linkify
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* @return string A link to the URL if string is a URL
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*/
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public static function linkIfMatch($string) {
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if( preg_match( '/^[a-z+]+\:\/\/[a-zA-Z0-9$-_.+?&=!*\'()%]+$/', $string ) )
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return "<a style=\"white-space: nowrap\" href=\"$string\">$string</a>";
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else
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return $string;
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}
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/**
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* Simple conversion of HTML to plaintext.
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*
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* @param string $data Input data
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* @param bool $preserveLinks
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* @param int $wordWrap
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* @param array $config
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* @return string
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*/
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public static function html2raw($data, $preserveLinks = false, $wordWrap = 0, $config = null) {
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$defaultConfig = array(
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'PreserveLinks' => false,
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'ReplaceBoldAsterisk' => true,
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'CompressWhitespace' => true,
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'ReplaceImagesWithAlt' => true,
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);
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if(isset($config)) {
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$config = array_merge($defaultConfig,$config);
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} else {
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$config = $defaultConfig;
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}
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$data = preg_replace("/<style([^A-Za-z0-9>][^>]*)?>.*?<\/style[^>]*>/is","", $data);
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$data = preg_replace("/<script([^A-Za-z0-9>][^>]*)?>.*?<\/script[^>]*>/is","", $data);
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if($config['ReplaceBoldAsterisk']) {
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$data = preg_replace('%<(strong|b)( [^>]*)?>|</(strong|b)>%i','*',$data);
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}
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// Expand hyperlinks
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if(!$preserveLinks && !$config['PreserveLinks']) {
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$data = preg_replace_callback('/<a[^>]*href\s*=\s*"([^"]*)">(.*?)<\/a>/i', function($matches) {
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return Convert::html2raw($matches[2]) . "[$matches[1]]";
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}, $data);
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$data = preg_replace_callback('/<a[^>]*href\s*=\s*([^ ]*)>(.*?)<\/a>/i', function($matches) {
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return Convert::html2raw($matches[2]) . "[$matches[1]]";
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}, $data);
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}
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// Replace images with their alt tags
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if($config['ReplaceImagesWithAlt']) {
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$data = preg_replace('/<img[^>]*alt *= *"([^"]*)"[^>]*>/i', ' \\1 ', $data);
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$data = preg_replace('/<img[^>]*alt *= *([^ ]*)[^>]*>/i', ' \\1 ', $data);
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}
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// Compress whitespace
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if($config['CompressWhitespace']) {
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$data = preg_replace("/\s+/", " ", $data);
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}
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// Parse newline tags
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$data = preg_replace("/\s*<[Hh][1-6]([^A-Za-z0-9>][^>]*)?> */", "\n\n", $data);
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$data = preg_replace("/\s*<[Pp]([^A-Za-z0-9>][^>]*)?> */", "\n\n", $data);
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$data = preg_replace("/\s*<[Dd][Ii][Vv]([^A-Za-z0-9>][^>]*)?> */", "\n\n", $data);
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$data = preg_replace("/\n\n\n+/", "\n\n", $data);
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$data = preg_replace("/<[Bb][Rr]([^A-Za-z0-9>][^>]*)?> */", "\n", $data);
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$data = preg_replace("/<[Tt][Rr]([^A-Za-z0-9>][^>]*)?> */", "\n", $data);
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$data = preg_replace("/<\/[Tt][Dd]([^A-Za-z0-9>][^>]*)?> */", " ", $data);
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$data = preg_replace('/<\/p>/i', "\n\n", $data );
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// Replace HTML entities
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$data = html_entity_decode($data, ENT_QUOTES, 'UTF-8');
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// Remove all tags (but optionally keep links)
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// strip_tags seemed to be restricting the length of the output
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// arbitrarily. This essentially does the same thing.
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if(!$preserveLinks && !$config['PreserveLinks']) {
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$data = preg_replace('/<\/?[^>]*>/','', $data);
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} else {
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$data = strip_tags($data, '<a>');
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}
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// Wrap
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if($wordWrap) $data = wordwrap(trim($data), $wordWrap);
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return trim($data);
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}
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/**
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* There are no real specifications on correctly encoding mailto-links,
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* but this seems to be compatible with most of the user-agents.
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* Does nearly the same as rawurlencode().
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* Please only encode the values, not the whole url, e.g.
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* "mailto:test@test.com?subject=" . Convert::raw2mailto($subject)
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*
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* @param $data string
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* @return string
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* @see http://www.ietf.org/rfc/rfc1738.txt
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*/
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public static function raw2mailto($data) {
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return str_ireplace(
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array("\n",'?','=',' ','(',')','&','@','"','\'',';'),
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array('%0A','%3F','%3D','%20','%28','%29','%26','%40','%22','%27','%3B'),
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$data
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);
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}
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/**
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* Convert a string (normally a title) to a string suitable for using in
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* urls and other html attributes. Uses {@link URLSegmentFilter}.
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*
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* @param string
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* @return string
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*/
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public static function raw2url($title) {
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$f = URLSegmentFilter::create();
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return $f->filter($title);
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}
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/**
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* Normalises newline sequences to conform to (an) OS specific format.
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*
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* @param string $data Text containing potentially mixed formats of newline
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* sequences including \r, \r\n, \n, or unicode newline characters
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* @param string $nl The newline sequence to normalise to. Defaults to that
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* specified by the current OS
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* @return string
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*/
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public static function nl2os($data, $nl = PHP_EOL) {
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return preg_replace('~\R~u', $nl, $data);
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}
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/**
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* Encode a value into a string that can be used as part of a filename.
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* All string data must be UTF-8 encoded.
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*
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* @param mixed $val Value to be encoded
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* @return string
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*/
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public static function base64url_encode($val) {
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return rtrim(strtr(base64_encode(json_encode($val)), '+/', '~_'), '=');
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}
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/**
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* Decode a value that was encoded with Convert::base64url_encode.
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*
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* @param string $val Value to be decoded
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* @return mixed Original value
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*/
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public static function base64url_decode($val) {
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return json_decode(
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base64_decode(str_pad(strtr($val, '~_', '+/'), strlen($val) % 4, '=', STR_PAD_RIGHT)),
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true
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);
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}
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}
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