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filter_has_var

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

filter_has_varПроверяет существование переменной указанного типа

Описание

filter_has_var(int $input_type, string $var_name): bool

Список параметров

input_type

Один из INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, INPUT_ENV.

var_name

Имя проверяемой переменной.

Возвращаемые значения

Функция возвращает true, если выполнилась успешно, или false, если возникла ошибка.

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Примечания пользователей 2 notes

up
33
drm at melp dot nl
15 years ago
Please note that the function does not check the live array, it actually checks the content received by php:

<?php
$_GET
['test'] = 1;
echo
filter_has_var(INPUT_GET, 'test') ? 'Yes' : 'No';
?>

would say "No", unless the parameter was actually in the querystring.

Also, if the input var is empty, it will say Yes.
up
19
nanhe dot kumar at gmail dot com
11 years ago
Through this example i think you can better understand

if ( !filter_has_var(INPUT_GET, 'email') ) {
echo "Email Not Found";
}else{
echo "Email Found";
}
Output

localhost/nanhe/test.php?email=1 //Email Found
localhost/nanhe/test.php?email //Email Found
http://localhost/nanhe/test.php //Email Not Found

Consider on second example

http://localhost/nanhe/test.php
$_GET['email']="info@nanhe.in";
if ( !filter_has_var(INPUT_GET, 'email') ) {
echo "Email Not Found";
}else{
echo "Email Found";
}
But output will be Email Not Found
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