- var_dump: documentation ( source)
- is_numeric: documentation ( source)
<?php
//var_dump((int)"81ec2a7a42905aad8d1a67628778cac6");
//var_dump((int)"81e1");
//var_dump("+0.1" == ".1");
var_dump("81.00" == "81ec2a7a42905aad8d1a67628778cac6");
var_dump("9445" == "9445a1102cdc21d6a2b00ddfc601cbb8");
var_dump(is_numeric("81ec2a7a42905aad8d1a67628778cac6"));