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@ 2021-08-10T22:55:23Z

<?php

$s = 'hello';
$s[-1] = strtoupper($s[-1]);

echo $s;

Output
Performance
VLD
References
Branches

strtoupper: documentation ( source)

preferences:dark modelive previewkey bindings

42.83 ms | 1374 KiB | 5 Q