Write a simple PHP program to check that emails are valid

Use FILTER_VALIDATE_EMAIL filter that validates value as an e-mail address.

The FILTER_VALIDATE_EMAIL filter validates an e-mail address.

filter_var()

filter_var — Filters a variable with a specified filter

syntax:-

filter_var(mixed $value, int $filter = FILTER_DEFAULT, array|int $options = 0): mixed

Parameters

value

Value to filter. Note that scalar values are converted to string internally before they are filtered.

filter

The ID of the filter to apply. The Types of filters manual page lists the available filters.

If omitted, FILTER_DEFAULT will be used, which is equivalent to FILTER_UNSAFE_RAW. This will result in no filtering taking place by default

options

Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array. For the "callback" filter, callable type should be passed. The callback must accept one argument, the value to be filtered, and return the value after filtering/sanitizing it.

code

<?php
$email = "mail@example.com";
if (filter_var($email, FILTER_VALIDATE_EMAIL)) 
{
     echo "Valid";
}
else 
{
    echo "Invalid";

}
?>

output:-

valid