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@ 2020-08-20T00:50:42Z

<?php

function reverseWords($str) {
    return implode(' ', array_map('strrev', explode(' ', $str)));
}

echo reverseWords("this is a string"), PHP_EOL;
echo reverseWords("this is     a string");

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
explode: documentation ( source)

preferences:dark modelive previewkey bindings

112.26 ms | 1476 KiB | 5 Q