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@ 2015-05-05T16:50:44Z

<?php
    $str = "COenrdmr";
    
    $str[0] = chr(ord($str[0]) + hexdec('6b') - hexdec('42'));
    

    var_dump($str);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
chr: documentation ( source)
hexdec: documentation ( source)
ord: documentation ( source)

preferences:dark modelive preview

44.43 ms | 402 KiB | 5 Q