PHP 8.3.4 Released!

filter_has_var

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

filter_has_varChecks if variable of specified type exists

Açıklama

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

Bağımsız Değişkenler

input_type

One of INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, or INPUT_ENV.

var_name

Name of a variable to check.

Dönen Değerler

Başarı durumunda true, başarısızlık durumunda false döner.

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User Contributed Notes 3 notes

up
34
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
16
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
up
-16
dezlov
8 years ago
For people who are wondering whether "magic_quotes_gpc" has any affect on "filter_input" operation, here is an extract from a PHP source file:

* As the input filter acts on input data before the magic quotes function mangles data, all access through the filter() function will not have any quotes or slashes added - it will be the pure data as send by the browser.

So when using this function, there is no need to strip the slashes when "magic_quotes_gpc" is enabled.
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