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@ 2014-09-01T09:50:50Z

<?php

$data='iujhklsc'; 

if ( base64_encode(base64_decode($data, true)) === $data){
    echo '$data is valid';
} else {
    echo '$data is NOT valid';
}

Output
Performance
VLD
References
Branches

base64_decode: documentation ( source)
base64_encode: documentation ( source)

preferences:dark modelive preview

35.2 ms | 402 KiB | 5 Q