Check array for existence

Question

$array = Array
(
    [0] => Array
        (
            [id] => 46
            [title] => sometext
        )

    [1] => Array
        (
            [id] => 47
            [title] => sometext
        )
    [2] => Array
        (
            [id] => 48
            [title] => sometext
        )
    [3] => Array
        (
            [id] => 49
            [title] => sometext
        )
    [4] => Array
        (
            [id] => 50
            [title] => sometext
        )

)

We have an array and a variable:

$variable = 48; //some number

How do we check whether $variable exists in some arrays ['id'] inside $array?

Return true or false.

Python is *sooo* much more understandable: `48 in [18, 48]`. just saying ;) — Blender, Feb 03 '11 at 14:59
come on ! Are you a developer ? So do a loop and find your value ! Even if there is a built in function it has to loop through your object. Is it homework ? — remi bourgarel, Feb 03 '11 at 15:00
look on http://stackoverflow.com/questions/1019076/how-to-search-by-key-value-in-a-multidimensional-array-in-php — Haim Evgi, Feb 03 '11 at 15:00

score 11 · Accepted Answer · edited Feb 03 '11 at 15:00

11

function myCheck($array, $variable)
    foreach($array as $subArray) {
        if($subArray['id'] == $variable) {
            return true;
        }
    }
    return false;
}

edited Feb 03 '11 at 15:00

TJHeuvel

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answered Feb 03 '11 at 14:57

ThiefMaster

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score 3 · Answer 2 · edited Mar 23 '12 at 19:05

3

Use this function:

function check_array() {
  foreach ($array as $ar) {
    if ($ar['id'] == $variable)
      return true;
  }
  return false;
}

edited Mar 23 '12 at 19:05

Somnath Muluk

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answered Feb 03 '11 at 15:01

RDL

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This answer was added like 5 minutes after the first answers, and it's identical... how did it get up-voted over the others? – xil3 Feb 03 '11 at 15:13
1

@xil3, When I browse through the questions I usually open several in tabs at once and then go through them. Just b/c my answer was later doesn't mean it was copied. – RDL Feb 03 '11 at 15:24

score -1 · Answer 3 · answered Feb 03 '11 at 14:59

-1

Have you tried array_search? It returns the key value if found, or false if not found.

answered Feb 03 '11 at 14:59

JohnK813

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Check array for existence

3 Answers3