Simple with str_replace:
<?php
$string = "\b\fs\'80.\b";
$replacement = 4;
echo str_replace("\\'", $replacement, $string);
solved How to find the substring \’ in string, PHP
Simple with str_replace:
<?php
$string = "\b\fs\'80.\b";
$replacement = 4;
echo str_replace("\\'", $replacement, $string);
solved How to find the substring \’ in string, PHP