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filter_id> <Filter 関数
[edit] Last updated: Fri, 25 May 2012

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filter_has_var

(PHP 5 >= 5.2.0)

filter_has_var指定した型の変数が存在するかどうかを調べる

説明

bool filter_has_var ( int $type , string $variable_name )

パラメータ

type

INPUT_GETINPUT_POSTINPUT_COOKIEINPUT_SERVERINPUT_ENV のいずれか。

variable_name

調べたい変数の名前。

返り値

成功した場合に TRUE を、失敗した場合に FALSE を返します。



add a note add a note User Contributed Notes filter_has_var
Anonymous 21-May-2009 02:28
To note: filter_has_var() is a bit faster than isset()
drm at melp dot nl 16-Jan-2009 01:54
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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