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@ 2019-05-12T19:08:13Z

<?php

$string = "1XYZ";
$int = 1;

$start_int = (int) $string;
$start_str = str_replace($start_int, "", $string);
 
$result = $int+$start_int . $start_str;
echo $result;

Output
Performance
VLD
References
Branches

str_replace: documentation ( source)

preferences:dark modelive previewkey bindings

110.42 ms | 1404 KiB | 5 Q