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@ 2017-07-11T20:36:26Z

<?php
$value='1392387900';
var_dump(ctype_digit($value));
var_dump(new \DateTime('@' .$value));
$value=1092387900;
var_dump(ctype_digit($value));
var_dump(new \DateTime('@' .$value));
for($i=0;$i<100;$i++){
    if(ctype_digit($i)){
        echo $i;break;
    }
}

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
ctype_digit: documentation ( source)

preferences:dark modelive preview

46.23 ms | 402 KiB | 5 Q