May 12, 2022 in Php, Tips and Tricks
Validate phone number and email in php
Phone number validation using regular expression
$user_phone = $_POST['user_phone'];
if(!preg_match('/^([0-9]+)$/', $user_phone))
{
$_SESSION['info']="Please enter valid phone number";
header('location:/register');
}Phone number validation using is_numeric function
$user_phone = $_POST['user_phone'];
if(!is_numeric($user_phone))
{
$_SESSION['info']="Please enter valid phone number";
header('location:/register');
}if (filter_var($user_email, FILTER_VALIDATE_EMAIL) == false){
$_SESSION['info']="Please enter valid email";
header('location:/register');
}- is_int or is_integer
- is_numeric
- regular expressions
- ctype_digit
- filter_var
is_integer()
for this function these values are are not valid: “0010”, “123”
is_numeric()
for this function these values are valid: 1.3, +1234e44 and 0x539
filter_var()
for this function a value as “00123” is not valid
CONSLUSION
it seems that only regex and ctype_digit work always fine.
