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svn://svn.silverstripe.com/silverstripe/modules/sapphire/branches/2.2.0-mesq ........ r47807 | ischommer | 2008-01-10 14:07:06 +1300 (Thu, 10 Jan 2008) | 1 line added is_associative() ........ git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@47810 467b73ca-7a2a-4603-9d3b-597d59a354a9
89 lines
1.8 KiB
PHP
Executable File
89 lines
1.8 KiB
PHP
Executable File
<?php
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/**
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* @package sapphire
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* @subpackage misc
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*/
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/**
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* Library of static methods for manipulating arrays.
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* @package sapphire
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* @subpackage misc
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*/
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class ArrayLib extends Object {
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static function invert($arr) {
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if (! $arr) return false;
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foreach($arr as $columnName => $column) {
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foreach($column as $rowName => $cell) {
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$output[$rowName][$columnName] = $cell;
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}
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}
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return $output;
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}
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/**
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* Return an array where the keys are all equal to the values
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*
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* @param $arr array
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* @return array
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*/
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static function valuekey($arr) {
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foreach($arr as $val) {
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$newArr[$val] = $val;
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}
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return $newArr;
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}
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static function array_values_recursive($arr) {
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$lst = array();
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foreach(array_keys($arr) as $k){
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$v = $arr[$k];
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if (is_scalar($v)) {
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$lst[] = $v;
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} elseif (is_array($v)) {
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$lst = array_merge( $lst,
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self::array_values_recursive($v)
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);
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}
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}
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return $lst;
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}
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/**
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* Filter an array by keys (useful for only allowing certain form-input to be saved).
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*
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* @param $arr array
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* @param $keys array
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* @return array
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*/
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static function filter_keys($arr, $keys)
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{
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foreach ($arr as $key => $v) {
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if (!in_array($key, $keys)) {
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unset($arr[$key]);
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}
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}
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return $arr;
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}
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/**
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* Determines if an array is associative by checking
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* for existing keys via array_key_exists().
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* @see http://nz.php.net/manual/en/function.is-array.php#76188
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*
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* @param array $arr
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* @return boolean
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*/
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static function is_associative($arr) {
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if(is_array($arr) && ! empty($arr)) {
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for($iterator = count($arr) - 1; $iterator; $iterator--) {
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if (!array_key_exists($iterator, $arr)) return true;
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}
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return !array_key_exists(0, $arr);
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}
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return false;
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}
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}
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?>
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