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@ 2017-09-24T13:55:31Z

<?php
For($i=0; $i<10;$i++){
Echo substr(uniqid('', true),0,4) ."\n";
Sleep(0.5);
}

Output
Performance
VLD
References
Branches

substr: documentation ( source)
uniqid: documentation ( source)
sleep: documentation ( source)

preferences:dark modelive previewkey bindings

31.57 ms | 406 KiB | 5 Q