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<title>[29781] trunk: The joys of `wptexturize()`:</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/29781">29781</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/29781","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>wonderboymusic</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2014-09-29 04:06:54 +0000 (Mon, 29 Sep 2014)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>The joys of `wptexturize()`:
* Revert parts of <a href="https://core.trac.wordpress.org/changeset/28773">[28773]</a> and <a href="https://core.trac.wordpress.org/changeset/28727">[28727]</a> and <a href="https://core.trac.wordpress.org/changeset/29748">[29748]</a>.
* Do not crash PHP. Make the shortcode quantifier possessive to avoid backtracks.
* Reduce backtracking in long HTML comments by 100x.
* Do not ignore unclosed HTML comments.
* Do not break unregistered shortcodes, e.g. `[hello attr="value"]`.
* Do not break HTML in shortcode attributes, e.g. `[hello attr="<"]`.
* Do not match for shortcodes when there is extra whitespace, e.g. `[ hello ]`.
* Add unit tests to show <a href="https://core.trac.wordpress.org/ticket/12690">#12690</a> was not fully resolved.
* Tested PHP 5.2.4, 5.2.13, 5.4.32, and 5.5.8.
Adds/modifies unit tests.
Props miqrogroove.
See <a href="https://core.trac.wordpress.org/ticket/29557">#29557</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesformattingphp">trunk/src/wp-includes/formatting.php</a></li>
<li><a href="#trunksrcwpincludesshortcodesphp">trunk/src/wp-includes/shortcodes.php</a></li>
<li><a href="#trunktestsphpunittestsformattingWPTexturizephp">trunk/tests/phpunit/tests/formatting/WPTexturize.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesformattingphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/formatting.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/formatting.php 2014-09-29 04:02:23 UTC (rev 29780)
+++ trunk/src/wp-includes/formatting.php 2014-09-29 04:06:54 UTC (rev 29781)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -28,7 +28,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return string The string replaced with html entities
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function wptexturize($text, $reset = false) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- global $wp_cockneyreplace, $shortcode_tags;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ global $wp_cockneyreplace;
</ins><span class="cx" style="display: block; padding: 0 10px"> static $static_characters, $static_replacements, $dynamic_characters, $dynamic_replacements,
</span><span class="cx" style="display: block; padding: 0 10px"> $default_no_texturize_tags, $default_no_texturize_shortcodes, $run_texturize = true;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -205,45 +205,55 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // Look for shortcodes and HTML elements.
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $tagnames = array_keys( $shortcode_tags );
- $tagregexp = join( '|', array_map( 'preg_quote', $tagnames ) );
- $tagregexp = "(?:$tagregexp)(?![\\w-])"; // Excerpt of get_shortcode_regex().
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $comment_regex =
+ '!' // Start of comment, after the <.
+ . '(?:' // Unroll the loop: Consume everything until --> is found.
+ . '-(?!->)' // Dash not followed by end of comment.
+ . '[^\-]*+' // Consume non-dashes.
+ . ')*+' // Loop possessively.
+ . '(?:-->)?'; // End of comment. If not found, match all input.
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $regex = '/(' // Capture the entire match.
- . '<' // Find start of element.
- . '(?(?=!--)' // Is this a comment?
- . '.+?--\s*>' // Find end of comment
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $shortcode_regex =
+ '\[' // Find start of shortcode.
+ . '[\/\[]?' // Shortcodes may begin with [/ or [[
+ . '[^\s\/\[\]]' // No whitespace before name.
+ . '[^\[\]]*+' // Shortcodes do not contain other shortcodes. Possessive critical.
+ . '\]' // Find end of shortcode.
+ . '\]?'; // Shortcodes may end with ]]
+
+ $regex =
+ '/(' // Capture the entire match.
+ . '<' // Find start of element.
+ . '(?(?=!--)' // Is this a comment?
+ . $comment_regex // Find end of comment.
+ . '|'
+ . '[^>]+>' // Find end of element.
+ . ')'
</ins><span class="cx" style="display: block; padding: 0 10px"> . '|'
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- . '[^>]+>' // Find end of element
- . ')'
- . '|'
- . '\[' // Find start of shortcode.
- . '\[?' // Shortcodes may begin with [[
- . '\/?' // Closing slash may precede name.
- . $tagregexp // Only match registered shortcodes, because performance.
- . '[^\[\]]*' // Shortcodes do not contain other shortcodes.
- . '\]' // Find end of shortcode.
- . '\]?' // Shortcodes may end with ]]
- . ')/s';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ . $shortcode_regex // Find shortcodes.
+ . ')/s';
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $textarr = preg_split( $regex, $text, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> foreach ( $textarr as &$curl ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // Only call _wptexturize_pushpop_element if $curl is a delimiter.
</span><span class="cx" style="display: block; padding: 0 10px"> $first = $curl[0];
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( '<' === $first && '>' === substr( $curl, -1 ) ) {
- // This is an HTML delimiter.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( '<' === $first && '<!--' === substr( $curl, 0, 4 ) ) {
+ // This is an HTML comment delimeter.
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( '<!--' !== substr( $curl, 0, 4 ) ) {
- _wptexturize_pushpop_element( $curl, $no_texturize_tags_stack, $no_texturize_tags );
- }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ continue;
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ } elseif ( '<' === $first && '>' === substr( $curl, -1 ) ) {
+ // This is an HTML element delimiter.
+
+ _wptexturize_pushpop_element( $curl, $no_texturize_tags_stack, $no_texturize_tags );
+
</ins><span class="cx" style="display: block; padding: 0 10px"> } elseif ( '' === trim( $curl ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // This is a newline between delimiters. Performance improves when we check this.
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> continue;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- } elseif ( '[' === $first && 1 === preg_match( '/^\[\[?\/?' . $tagregexp . '[^\[\]]*\]\]?$/', $curl ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ } elseif ( '[' === $first && 1 === preg_match( '/^' . $shortcode_regex . '$/', $curl ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> // This is a shortcode delimiter.
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> if ( '[[' !== substr( $curl, 0, 2 ) && ']]' !== substr( $curl, -2 ) ) {
</span></span></pre></div>
<a id="trunksrcwpincludesshortcodesphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/shortcodes.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/shortcodes.php 2014-09-29 04:02:23 UTC (rev 29780)
+++ trunk/src/wp-includes/shortcodes.php 2014-09-29 04:06:54 UTC (rev 29781)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -231,7 +231,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $tagregexp = join( '|', array_map('preg_quote', $tagnames) );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // WARNING! Do not change this regex without changing do_shortcode_tag() and strip_shortcode_tag()
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- // Also, see shortcode_unautop() and shortcode.js and wptexturize().
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Also, see shortcode_unautop() and shortcode.js.
</ins><span class="cx" style="display: block; padding: 0 10px"> return
</span><span class="cx" style="display: block; padding: 0 10px"> '\\[' // Opening bracket
</span><span class="cx" style="display: block; padding: 0 10px"> . '(\\[?)' // 1: Optional second opening bracket for escaping shortcodes: [[tag]]
</span></span></pre></div>
<a id="trunktestsphpunittestsformattingWPTexturizephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/formatting/WPTexturize.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/formatting/WPTexturize.php 2014-09-29 04:02:23 UTC (rev 29780)
+++ trunk/tests/phpunit/tests/formatting/WPTexturize.php 2014-09-29 04:06:54 UTC (rev 29781)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1188,14 +1188,30 @@
</span><span class="cx" style="display: block; padding: 0 10px"> function data_tag_avoidance() {
</span><span class="cx" style="display: block; padding: 0 10px"> return array(
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '[ ... ]',
+ '[ … ]',
+ ),
+ array(
</ins><span class="cx" style="display: block; padding: 0 10px"> '[ is it wise to <a title="allow user content ] here? hmm"> maybe </a> ]',
</span><span class="cx" style="display: block; padding: 0 10px"> '[ is it wise to <a title="allow user content ] here? hmm"> maybe </a> ]',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '[is it wise to <a title="allow user content ] here? hmm"> maybe </a> ]', // HTML corruption is a known bug. See tickets #12690 and #29557.
+ '[is it wise to <a title="allow user content ] here? hmm”> maybe </a> ]',
+ ),
+ array(
+ '[caption - is it wise to <a title="allow user content ] here? hmm"> maybe </a> ]',
+ '[caption - is it wise to <a title="allow user content ] here? hmm”> maybe </a> ]',
+ ),
+ array(
</ins><span class="cx" style="display: block; padding: 0 10px"> '[ photos by <a href="http://example.com/?a[]=1&a[]=2"> this guy </a> ]',
</span><span class="cx" style="display: block; padding: 0 10px"> '[ photos by <a href="http://example.com/?a[]=1&a[]=2"> this guy </a> ]',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '[photos by <a href="http://example.com/?a[]=1&a[]=2"> this guy </a>]',
+ '[photos by <a href="http://example.com/?a[]=1&a[]=2"> this guy </a>]',
+ ),
+ array(
</ins><span class="cx" style="display: block; padding: 0 10px"> '[gallery ...]',
</span><span class="cx" style="display: block; padding: 0 10px"> '[gallery ...]',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1212,10 +1228,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> '[/gallery ...]',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- '[...]...[/...]', // These are potentially usable shortcodes.
- '[…]…[/…]',
- ),
- array(
</del><span class="cx" style="display: block; padding: 0 10px"> '[[gallery]]...[[/gallery]]', // Shortcode parsing will ignore the inner ]...[ part and treat this as a single escaped shortcode.
</span><span class="cx" style="display: block; padding: 0 10px"> '[[gallery]]…[[/gallery]]',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1224,10 +1236,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> '[[[gallery]]]…[[[/gallery]]]',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- '[gal>ery ...]',
- '[gal>ery …]',
- ),
- array(
</del><span class="cx" style="display: block; padding: 0 10px"> '[gallery ...',
</span><span class="cx" style="display: block; padding: 0 10px"> '[gallery …',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1300,10 +1308,42 @@
</span><span class="cx" style="display: block; padding: 0 10px"> '<!--...-->',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- '<!-- ... -- >',
- '<!-- ... -- >',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '<!-- ... -- > ...',
+ '<!-- ... -- > ...',
</ins><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '<!-- ...', // An unclosed comment is still a comment.
+ '<!-- ...',
+ ),
+ array(
+ 'a<!-->b', // Browsers seem to allow this.
+ 'a<!-->b',
+ ),
+ array(
+ 'a<!--->b',
+ 'a<!--->b',
+ ),
+ array(
+ 'a<!---->b',
+ 'a<!---->b',
+ ),
+ array(
+ 'a<!----->b',
+ 'a<!----->b',
+ ),
+ array(
+ 'a<!-- c --->b',
+ 'a<!-- c --->b',
+ ),
+ array(
+ 'a<!-- c -- d -->b',
+ 'a<!-- c -- d -->b',
+ ),
+ array(
+ 'a<!-- <!-- c --> -->b<!-- close -->',
+ 'a<!-- <!-- c --> –>b<!-- close -->',
+ ),
+ array(
</ins><span class="cx" style="display: block; padding: 0 10px"> '<!-- <br /> [gallery] ... -->',
</span><span class="cx" style="display: block; padding: 0 10px"> '<!-- <br /> [gallery] ... -->',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1727,13 +1767,25 @@
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><span class="cx" style="display: block; padding: 0 10px"> '[code ...]...[/code]', // code is not a registered shortcode.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- '[code …]…[/code]',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '[code ...]...[/code]',
</ins><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><span class="cx" style="display: block; padding: 0 10px"> '[hello ...]...[/hello]', // hello is not a registered shortcode.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- '[hello …]…[/hello]',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '[hello ...]…[/hello]',
</ins><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '[...]...[/...]', // These are potentially usable shortcodes.
+ '[...]…[/...]',
+ ),
+ array(
+ '[gal>ery ...]',
+ '[gal>ery ...]',
+ ),
+ array(
+ '[randomthing param="test"]',
+ '[randomthing param="test"]',
+ ),
+ array(
</ins><span class="cx" style="display: block; padding: 0 10px"> '[[audio]...[/audio]...', // These are potentially usable shortcodes. Unfortunately, the meaning of [[audio] is ambiguous unless we run the entire shortcode regexp.
</span><span class="cx" style="display: block; padding: 0 10px"> '[[audio]…[/audio]…',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span></span></pre>
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