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@ 2021-06-16T08:33:30Z

<?php
function hyphenate($str) {
    return implode("-", str_split($str, 3));
}

echo hyphenate("ABCDEF");

Output
Performance
VLD
References
Branches

implode: documentation ( source)
str_split: documentation ( source)

preferences:dark modelive preview

57.51 ms | 402 KiB | 5 Q