Checking if Array exist?

Question

There is post of select form like:

<select name="option[color][0]">
<select name="option[color][1]">
// option[color][2] isnt posted

Some products doesnt have that select, and then when I try to get them from post, each time if select isn't posted, im getting error like:

Undefined offset: 2

How to check if something is posted? Tried:

$ids       = $_POST['id'];
$option = $_POST['option'];

foreach ($ids as $key => $id)
{
   //Undefined offset: 2
   if( $option['color'][$key] )
   {
      $_SESSION[$key]['option']['color'] = $option['color'][$key];
   }

   //Undefined offset: 2
   if( !empty($option['color'][$key]) )
   {
      $_SESSION[$key]['option']['color'] = $option['color'][$key];
   }

   //Undefined offset: 2
   if( isset($option['color'][$key]) )
   {
      $_SESSION[$key]['option']['color'] = $option['color'][$key];
   }

   //... etc
}

Etc.... what ever I try, there is error :( Please help

Daniel · Accepted Answer · 2012-04-27 13:06:33Z

2

Try array_key_exists to see if it exists.

answered Apr 27, 2012 at 13:06

Daniel

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Comments

bspellmeyer · Accepted Answer · 2012-04-27 13:16:25Z

1

isset($option['color'][$key]) is the way to go.

Check the exact line of code the error occurs when you still get it using isset().

answered Apr 27, 2012 at 13:16

bspellmeyer

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Comments

Sam Sussman · Accepted Answer · 2012-04-27 13:17:11Z

1

if it is always 0,1,2 or any line of consecutive integers you could do if(count($option['color']) > $key ){}

edited Apr 27, 2012 at 13:17

answered Apr 27, 2012 at 13:09

Sam Sussman

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2 Comments

Sam Sussman Over a year ago

sorry should be just > not >=

Bobo Over a year ago

This also workd, but allready gave best answer. Thanks one more time

ilyes kooli · Accepted Answer · 2012-04-27 13:09:19Z

0

if( isset($option['color'][$key]) )
{
  $_SESSION[$key]['option']['color'] = $option['color'][$key];
}

answered Apr 27, 2012 at 13:09

ilyes kooli

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Comments

Community · Accepted Answer · 2023-11-20 22:45:59Z

0

use isset or empty.

for example:

if (isset($array['idx'])){ ... }
if (!empty($array['idx'])){ ... }

edited Nov 20, 2023 at 22:45

CommunityBot

11 silver badge

answered Apr 27, 2012 at 13:11

Alex

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