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PHP: remove reference to POSIX regex functions #153

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dingo-d merged 1 commit into from
Sep 17, 2025
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PHP: remove reference to POSIX regex functions #153

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3 changes: 2 additions & 1 deletion wordpress-coding-standards/php.md
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Expand Up @@ -1012,7 +1012,8 @@ Closures should not be passed as filter or action callbacks, as removing these v

### Regular Expressions

Perl compatible regular expressions ([PCRE](https://www.php.net/pcre), `preg_` functions) should be used in preference to their POSIX counterparts. Never use the `/e` switch, use `preg_replace_callback` instead.
Perl compatible regular expressions ([PCRE](https://www.php.net/pcre), `preg_` functions) should be used.
Never use the `/e` switch, use `preg_replace_callback` instead.

It's most convenient to use single-quoted strings for regular expressions since, contrary to double-quoted strings, they have only two metasequences which need escaping: `\'` and `\\`.

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