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PHP RegEx

Using preg_replace()

Visit W3Schools!

<?php
// define string
$str = "Visit Microsoft!";

// case-insensitive regular expression to replace Microsoft with W3Schools in a string
$pattern = "/microsoft/i";

// display the results of the case-insensitive regular expression search and replace Microsoft with W3Schools in a string
echo preg_replace($pattern, "W3Schools", $str);
?>

The preg_replace() function will replace all of the matches of the pattern in a string with another string.