wp_spaces_regexp()
Returns the regexp for common whitespace characters.
By default, spaces include new lines, tabs, nbsp entities, and the UTF-8 nbsp. This is designed to replace the PCRE \s sequence. In ticket #22692, that sequence was found to be unreliable due to random inclusion of the A0 byte.
1 time — 0.000001 sec (speed of light) | 50000 times — 0.000001 sec (speed of light) | PHP 7.3.12, WP 5.3.2
Hooks from the function
Return
String
. The spaces regexp.
Usage
wp_spaces_regexp();
Examples
#1 Example of using the function
An example of a regular expression using the wp_spaces_regexp() function.
$spaces = wp_spaces_regexp(); // string(25) "[\r\n\t ]|\xC2\xA0| " var_dump($spaces); $text = " \t footer"; $pattern = "(?:{$spaces})*foo"; // possible starting spaces echo preg_replace( "/$pattern/", '', $text ); // outputs "ter"
Changelog
Since 4.0.0 | Introduced. |
wp_spaces_regexp() wp spaces regexp code WP 6.7.1
function wp_spaces_regexp() { static $spaces = ''; if ( empty( $spaces ) ) { /** * Filters the regexp for common whitespace characters. * * This string is substituted for the \s sequence as needed in regular * expressions. For websites not written in English, different characters * may represent whitespace. For websites not encoded in UTF-8, the 0xC2 0xA0 * sequence may not be in use. * * @since 4.0.0 * * @param string $spaces Regexp pattern for matching common whitespace characters. */ $spaces = apply_filters( 'wp_spaces_regexp', '[\r\n\t ]|\xC2\xA0| ' ); } return $spaces; }