What are some alternative tools or methods for testing and debugging regular expressions in PHP?

When testing and debugging regular expressions in PHP, one alternative tool that can be used is an online regex tester such as regex101.com or regexr.com. These tools allow you to input your regular expression and test it against sample strings, providing detailed explanations of each match. Another method is to use the preg_match() function in PHP along with var_dump() to print out the results of the match and debug any issues. 

$pattern = '/^(\d{3})-(\d{3})-(\d{4})$/';
$string = '123-456-7890';

if (preg_match($pattern, $string, $matches)) {
    var_dump($matches);
} else {
    echo 'No match found.';
}

Keywords

Regular expressions testing debugging tools methods

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