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@ 2024-09-25T14:58:07Z

<?php

$check = fn ($a) => ctype_upper($a);

$check(3);
$check([]);
$check(new stdClass);
$check(3.5);
$check(true);
$check(null);
$check(0);
$check(256);

Output
Performance
VLD
References
Branches

ctype_upper: documentation ( source)

preferences:dark modelive previewkey bindings

22.7 ms | 404 KiB | 5 Q