Answers for "10 digit number mobile number validation in php"

php validate phone number

$phone = '000-0000-0000';

if(preg_match("/^[0-9]{3}-[0-9]{4}-[0-9]{4}$/", $phone)) {
  // $phone is valid
}

php show number 4 digit

echo str_pad( "1", 4, "0", STR_PAD_LEFT );
echo str_pad( "12", 4, "0", STR_PAD_LEFT );

validate number should by 12 digit in php

/^$|^[0-9]{12}$/