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<title>[57056] trunk/src/wp-includes/kses.php: Coding Standards: Remove unnecessary ignore annotation in `wp_kses_hair_parse()`.</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/57056">57056</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/57056","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-11-03 15:31:51 +0000 (Fri, 03 Nov 2023)</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'>Coding Standards: Remove unnecessary ignore annotation in `wp_kses_hair_parse()`.
It is perfectly possible to write a commented regex with layout for readability by using the `x` modifier.
As per the manual:
> x (`PCRE_EXTENDED`)
>
> If this modifier is set, whitespace data characters in the pattern are totally ignored except when escaped or inside a character class, and characters between an unescaped # outside a character class and the next newline character, inclusive, are also ignored. This is equivalent to Perl's /x modifier, and makes it possible to include commentary inside complicated patterns.
>
> Note, however, that this applies only to data characters. Whitespace characters may never appear within special character sequences in a pattern, for example within the sequence (?( which introduces a conditional subpattern.
Reference: [https://www.php.net/manual/en/reference.pcre.pattern.modifiers.php PHP Manual: Pattern Modifiers].
This commit rewrites these two regexes to use the `x` modifier and gets rid of the unnecessary `phpcs:disable` comments.
The tests in the `tests/phpunit/tests/db/dbDelta.php` file cover this change.
Follow-up to <a href="https://core.trac.wordpress.org/changeset/42249">[42249]</a>.
Props jrf.
See <a href="https://core.trac.wordpress.org/ticket/59650">#59650</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesksesphp">trunk/src/wp-includes/kses.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpincludesksesphp"></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/kses.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/kses.php 2023-11-02 15:00:42 UTC (rev 57055)
+++ trunk/src/wp-includes/kses.php 2023-11-03 15:31:51 UTC (rev 57056)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1536,36 +1536,37 @@
</span><span class="cx" style="display: block; padding: 0 10px"> return array();
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- // phpcs:disable Squiz.Strings.ConcatenationSpacing.PaddingFound -- don't remove regex indentation
</del><span class="cx" style="display: block; padding: 0 10px"> $regex =
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- '(?:'
- . '[_a-zA-Z][-_a-zA-Z0-9:.]*' // Attribute name.
- . '|'
- . '\[\[?[^\[\]]+\]\]?' // Shortcode in the name position implies unfiltered_html.
- . ')'
- . '(?:' // Attribute value.
- . '\s*=\s*' // All values begin with '='.
- . '(?:'
- . '"[^"]*"' // Double-quoted.
- . '|'
- . "'[^']*'" // Single-quoted.
- . '|'
- . '[^\s"\']+' // Non-quoted.
- . '(?:\s|$)' // Must have a space.
- . ')'
- . '|'
- . '(?:\s|$)' // If attribute has no value, space is required.
- . ')'
- . '\s*'; // Trailing space is optional except as mentioned above.
- // phpcs:enable
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ '(?:
+ [_a-zA-Z][-_a-zA-Z0-9:.]* # Attribute name.
+ |
+ \[\[?[^\[\]]+\]\]? # Shortcode in the name position implies unfiltered_html.
+ )
+ (?: # Attribute value.
+ \s*=\s* # All values begin with "=".
+ (?:
+ "[^"]*" # Double-quoted.
+ |
+ \'[^\']*\' # Single-quoted.
+ |
+ [^\s"\']+ # Non-quoted.
+ (?:\s|$) # Must have a space.
+ )
+ |
+ (?:\s|$) # If attribute has no value, space is required.
+ )
+ \s* # Trailing space is optional except as mentioned above.
+ ';
</ins><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"> * Although it is possible to reduce this procedure to a single regexp,
</span><span class="cx" style="display: block; padding: 0 10px"> * we must run that regexp twice to get exactly the expected result.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ *
+ * Note: do NOT remove the `x` modifiers as they are essential for the above regex!
</ins><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $validation = "%^($regex)+$%";
- $extraction = "%$regex%";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $validation = "%^($regex)+$%x";
+ $extraction = "%$regex%x";
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> if ( 1 === preg_match( $validation, $attr ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> preg_match_all( $extraction, $attr, $attrarr );
</span></span></pre>
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