Automattic\WooCommerce\Vendor\Pelago\Emogrifier\Utilities

Preg::replaceCallback │ public │ WC 1.0

Wraps preg_replace_callback, though does not support $subject being an array. If an error occurs, and exceptions are not being thrown, the original $subject is returned.

Note that (unlike when calling preg_replace_callback), $callback cannot be a non-public method represented by an array comprising an object or class name and the method name. To circumvent that, use \Closure::fromCallable([$objectOrClassName, 'method']).

Method of the class: Preg{}

No Hooks.

Returns

null. Nothing (null).

Usage

$Preg = new Preg();
$Preg->replaceCallback( $pattern, $callback, $subject, $limit, ?int $count ): string;
$pattern(non-empty-string|non-empty-array) (required)
.
$callback(callable) (required)
.
$subject(string) (required)
.
$limit(int)
.
Default: -1
?int $count(passed by reference — &)
.
Default: null

Preg::replaceCallback() code WC 10.5.0

woocommerce/lib/packages/Pelago/Emogrifier/Utilities/Preg.php 
public function replaceCallback(
    $pattern,
    callable $callback,
    string $subject,
    int $limit = -1,
    ?int &$count = null
): string {
    $result = \preg_replace_callback($pattern, $callback, $subject, $limit, $count);

    if ($result === null) {
        $this->logOrThrowPregLastError();
        $result = $subject;
    }

    return $result;
}