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Comment on why it's a non-greedy match.

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Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
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Edward Z. Yang 2017-03-06 23:27:30 -08:00
parent 5886326cd0
commit 66bbae73a9
1 changed files with 3 additions and 0 deletions
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3
library/HTMLPurifier/Filter/ExtractStyleBlocks.php
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@ -95,6 +95,9 @@ class HTMLPurifier_Filter_ExtractStyleBlocks extends HTMLPurifier_Filter
if ($tidy !== null) { if ($tidy !== null) {
$this->_tidy = $tidy; $this->_tidy = $tidy;
} }
// NB: this must be NON-greedy because if we have
// <style>foo</style> <style>bar</style>
// we must not grab foo</style> <style>bar
$html = preg_replace_callback('#<style(?:\s.*)?>(.*)<\/style>#isU', array($this, 'styleCallback'), $html); $html = preg_replace_callback('#<style(?:\s.*)?>(.*)<\/style>#isU', array($this, 'styleCallback'), $html);
$style_blocks = $this->_styleMatches; $style_blocks = $this->_styleMatches;
$this->_styleMatches = array(); // reset $this->_styleMatches = array(); // reset