방법 1:
함수 hidtel($phone){
$IsWhat = preg_match('/(0[0-9]{2,3}[-]?[2-9][0-9]{6,7}[-]?[0-9]?)/ i',$phone) //유선전화
If($IsWhat == 1){
return preg_replace('/(0[0-9]{2,3}[-]?[2-9])[0-9]{3,4}([0-9]{3}[-]? [0-9]?)/i','$1****$2',$phone);
}그밖에{
return preg_replace('/(1[358]{1}[0-9])[0-9]{4}([0-9]{4})/i','$1****$2', $phone);
}
}
방법 2:
$num = "13966778888"
$str = substr_replace($num,'****',3,4);