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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$password = 'You2rPassword!++123,?@#$%';
$specialCharacters = preg_match_all('/[^\+\*\?\[\]\^\\$\(\)\{\}\=\!]*/', '', $password);
$clearing = preg_replace('/[^a-zA-Z0-9]/', '', $specialCharacters);
echo $clearing;