PHP, $_GET["variable "] only works if with certain values

Question

I can't get my head round this. The code below works fine at getting the variable "s" from the url and displaying the h1 but I've found it only works is the variable is set as certain characters. It works if the variable is set as either "l", "m" or "n". But it doesn't work in most cases including if the variable is set as "w", "wind", "nn" or even a random collection of letter like "sfda".

if ($_GET["s"]=='l'){?>
    <h1>Services for Companies</h1><?php
}

When it isn't working, Wordpress displays a "Sorry, that page can't be found" page.

How should if ($_GET["s"]=='l') evaluate to true when s is set to something other than l ? — Daniel W.
– Daniel W., Commented Jul 15, 2014 at 15:07

Community · Accepted Answer · 2017-05-23 12:29:28Z

3

If you just want to check if a variable exists, you can use isset:

if( isset( $_GET['s'] ) ) {
    echo 'Yes, this variable exists.';
}

But in Wordpress you should use the get_query_var() function to access query parameters. This function has some basic security checks included.

if( get_query_var( 's' ) ) {
    echo 'Yes, this variable exists.';
}

Be aware that there are multiple GET variables, that are already used in Wordpress. For a full list see "WordPress Query Vars".

See also: How to pass extra variables in URL with Wordpress

edited May 23, 2017 at 12:29

CommunityBot

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answered Jul 15, 2014 at 15:08

feeela

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Comments

Prashant · Accepted Answer · 2014-07-15 15:14:42Z

0

you can try :

GET and POST method

if(isset($_REQUEST['s'])){
echo 's ='.$_REQUEST['s'];
}

or only get method

if(isset($_GET['s'])){
echo 's='.$_GET['s'];
}

answered Jul 15, 2014 at 15:14

community wiki

Prashant

Comments

Calvin deClaisse-Walford · Accepted Answer · 2014-07-15 17:14:13Z

0

WordPress uses query variables to perform certain functions. In this case, s is the normal WordPress search query. I would recommend using a very specific url query, like headerquery or titlequery to avoid any conflicts.

answered Jul 15, 2014 at 17:14

Calvin deClaisse-Walford

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