search associative array by value

Question

I\'m fetching some JSON from flickrs API. My problem is that the exif data is in different order depending on the camera. So I can\'t hard-code an array number to get, for i

Answer 1

This would be fairly trivial to implement:

$model = '';

foreach ($exif['photo']['exif'] as $data) {
    if ($data['label'] == 'Model') {
        $model = $data['raw']['_content'];
        break;
    }
}

Answer 2

$key = array_search('model', array_column($data, 'label'));

In more recent versions of PHP, specifically PHP 5 >= 5.5.0, the function above will work.

Answer 3

The following function, searches in an associative array both for string values and values inside other arrays. For example , given the following array

 $array= [  "one" => ["a","b"],
            "two" => "c" ];

the following function can find both a,b and c as well

 function search_assoc($value, $array){
         $result = false;
         foreach ( $array as $el){
             if (!is_array($el)){
                 $result = $result||($el==$value);
             }
             else if (in_array($value,$el))
                 $result= $result||true;
             else $result= $result||false;
         }
         return $result;
     }

Answer 4

As far as I know , PHP does not have in built-in search function for multidimensional array. It has only for indexed and associative array. Therefore you have to write your own search function!!

Answer 5

$key = array_search('Model', array_map(function($data) {return $data['label'];}, $exif))

The array_map() function sends each value of an array to a user-made function, and returns an array with new values, given by the user-made function. In this case we are returning the label.

The array_search() function search an array for a value and returns the key. (in this case we are searching the returned array from array_map for the label value 'Model')

Answer 6

foreach($exif['photo']['exif'] as $row) {
    foreach ($row as $k => $v) {
        if ($k == "label" AND $v == "Model")
            $needle[] = $row["raw"];
    }
}
print_r($needle);