Regular Expressions in PHP

 Regular Expressions in PHP

PHP supports regular expressions, which are used to search, replace, and manipulate strings based on patterns. Regular expressions can be used to validate user input and extract data from strings.

Example:

php

// match a pattern

$text = "The quick brown fox jumps over the lazy dog.";

$pattern = "/quick/";

if (preg_match($pattern, $text)) {

    echo "Match found!";

} else {

    echo "Match not found.";

}

// replace a pattern

$text = "The quick brown fox jumps over the lazy dog.";

$pattern = "/quick/";

$replacement = "slow";

echo preg_replace($pattern, $replacement, $text);