php-regexHow to use regex in PHP to extract matched values?

Regex (Regular Expressions) is a powerful tool used to match patterns in strings. It can be used in PHP to extract matched values from a string.

Example

$string = 'This is a string';
$pattern = '/\w+/';

preg_match_all($pattern, $string, $matches);

print_r($matches);

Output example

Array
(
    [0] => Array
        (
            [0] => This
            [1] => is
            [2] => a
            [3] => string
        )

)

Code explanation

• $string: This is the string that we want to match against.
• $pattern: This is the regex pattern that we want to use to match against the string.
• preg_match_all(): This is the PHP function used to match the pattern against the string. It takes three parameters: the pattern, the string, and an array to store the matches.
• print_r(): This is the PHP function used to print out the matches.

Helpful links

• PHP Regex Documentation
• Regular Expressions Tutorial

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