filter_has_var

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

filter_has_varChecks if variable of specified type exists

Descrizione

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

Elenco dei parametri

input_type

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

var_name

Name of a variable to check.

Valori restituiti

Restituisce true in caso di successo, false in caso di fallimento.

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User Contributed Notes 3 notes

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26
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.
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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
up
-12
dezlov
9 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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