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@ 2022-05-11T08:51:11Z

<?php

$str = '🏴󠁧󠁢󠁥󠁮󠁧󠁿';
$res = [
    'strlen'  => strlen($str),
    'mb_strlen'  => mb_strlen($str),
    'grapheme_strlen'  => grapheme_strlen($str),
];
echo json_encode($res, JSON_PRETTY_PRINT);
/*
{
    "strlen": 28,
    "mb_strlen": 7,
    "grapheme_strlen": 1
}
 */

Output
Performance
VLD
References
Branches

mb_strlen: documentation ( source)
json_encode: documentation ( source)

preferences:dark modelive preview

54.48 ms | 402 KiB | 5 Q