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@ 2020-12-23T04:13:14Z

<?php

function morsedecode($code){
    $search = array('.-', '-...');
    $replace = array('a', 'b');
    return strtr($code, array_combine($search, $replace));
}

echo morsedecode(".- -...");

Output
Performance
VLD
References
Branches

array_combine: documentation ( source)
strtr: documentation ( source)

preferences:dark modelive preview

60.78 ms | 402 KiB | 5 Q