PHP - I'm a little confused on $_POST and in_array

Question

Alright so i receive from $_POST and i need my code do something like this

if ($_POST contains EU-London) {
//do stuff here
}else{
//failed to find EU-London
}

Now i've been told several ways to find a certain phrase in code but the posted data contains:

 Array
 (
     [EU-London] => 
 )

How would i check if the EU-London is there? because pregmatch uses strings and im not sure how to grab this using in_array()

Paul · Accepted Answer · 2016-04-13T12:54:32.427

4

You seem to be looking for a key in $_POST:

if (isset($_POST['EU-London'])) {
  // Key exists.
}

As correctly commented by Robert, the proper way to check for an existing key would be

if (array_key_exists('EU-London', $_POST)) {
  // Key exists.
}

edited Apr 13 '16 at 12:54

answered Apr 13 '16 at 12:49

Paul

actually the proper way to check if key exists is function` array_key_exists()` isset check if key exists and is set but you can have 'key' = null and isset will return false – Robert Apr 13 '16 at 12:50
Thank you so much! i can't believe it was that simple! I feel pretty stupid i get confused when it comes to using $_POST – tryzombie501 Apr 13 '16 at 12:52
@Robert True, but we talking about POST data, this corner case is very unlikely. Will update my answer though. – Paul Apr 13 '16 at 12:53

Shay Altman · Answer 2 · 2016-04-13T13:50:36.233

2

You can check if isset key

if (isset($_POST['EU-London'])) {
    //key isset
}

edited Apr 13 '16 at 13:50

answered Apr 13 '16 at 12:48

Shay Altman

2 Answers2