Hi people, i wanna know from you if this is the way to complete a filed with zeros 
"0"...

if i type 01 it completes to 0001




function zero4($campo) {

if(strlen($campo) == 4) {

 $status = "ok";

}else{

while(strlen($campo) < 4) {

$campo = 0 . $campo;

}
}
}
what do you think?




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