mirror of
https://github.com/silverstripe/silverstripe-textextraction
synced 2024-10-22 11:06:00 +02:00
65 lines
2.0 KiB
PHP
65 lines
2.0 KiB
PHP
<?php
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/**
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* Text extractor that uses php function strip_tags to get just the text. OK for indexing, not the best for readable text.
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* @author mstephens
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*
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*/
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class HTMLTextExtractor extends FileTextExtractor {
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function isAvailable() {
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return true;
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}
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function supportedExtensions() {
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return array("html", "htm", "xhtml");
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}
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/**
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* Lower priority because its not the most clever HTML extraction. If there is something better, use it
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*/
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public static $priority = 10;
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/**
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* Extracts content from regex, by using strip_tags()
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* combined with regular expressions to remove non-content tags like <style> or <script>,
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* as well as adding line breaks after block tags.
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*
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* @param [type] $path [description]
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* @return [type] [description]
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*/
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function getContent($path) {
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$content = file_get_contents($path);
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// Yes, yes, regex'ing HTML is evil.
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// Since we don't care about well-formedness or markup here, it does the job.
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$content = preg_replace(
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array(
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// Remove invisible content
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'@<head[^>]*?>.*?</head>@siu',
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'@<style[^>]*?>.*?</style>@siu',
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'@<script[^>]*?.*?</script>@siu',
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'@<object[^>]*?.*?</object>@siu',
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'@<embed[^>]*?.*?</embed>@siu',
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'@<applet[^>]*?.*?</applet>@siu',
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'@<noframes[^>]*?.*?</noframes>@siu',
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'@<noscript[^>]*?.*?</noscript>@siu',
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'@<noembed[^>]*?.*?</noembed>@siu',
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// Add line breaks before and after blocks
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'@</?((address)|(blockquote)|(center)|(del))@iu',
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'@</?((div)|(h[1-9])|(ins)|(isindex)|(p)|(pre))@iu',
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'@</?((dir)|(dl)|(dt)|(dd)|(li)|(menu)|(ol)|(ul))@iu',
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'@</?((table)|(th)|(td)|(caption))@iu',
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'@</?((form)|(button)|(fieldset)|(legend)|(input))@iu',
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'@</?((label)|(select)|(optgroup)|(option)|(textarea))@iu',
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'@</?((frameset)|(frame)|(iframe))@iu',
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),
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array(
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' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',"$0", "$0", "$0", "$0", "$0", "$0","$0", "$0",
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),
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$content
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);
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return strip_tags($content);
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}
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}
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?>
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