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@ 2018-10-15T15:26:36Z

<?php

function formatPhone($numOld) {
    return preg_replace('/^(?:\+?27|0)?/','+27', $numOld);
}

echo formatPhone("797734809") . "\n";
echo formatPhone("0797734809") . "\n";
echo formatPhone("27797734809") . "\n";
echo formatPhone("+27797734809");

Output
Performance
VLD
References
Branches

preg_replace: documentation ( source)

preferences:dark modelive previewkey bindings

34.09 ms | 404 KiB | 5 Q