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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$string[0] = 's:12:"Hello world!";';
$string[1] = 'not serialized';
$string[2] = 's:19:"wubba lubba dub dub";';
var_dump(unserialize($string[0]));
var_dump(unserialize($string[1]));
var_dump(unserialize($string[2]));