I have a PHP array that looks like this if I print_r($myarray)
Array ( [0] => Array ( [description] => testdecr [link] => testlink [image_id] => 150 ) )
I am trying to check for a key called image_id by doing this...
if (array_key_exists("image_id",$myarray)) {
echo 'Image_id exists';
}
This is not working, anyone any ideas what I am doing wrong?
"image_id" key is on nested array under position 0.
It should be:
...
if (array_key_exists("image_id", $myarray[0]))
image_id key exists on any array level, but it sounds like new input conditionYou can use this function if you use a multi-dimensional array.
function array_key_exists_in_multi($key, $array)
{
$result = array_key_exists($key, $array);
foreach ($array as $value) {
$result = (is_array($value)) ? array_key_exists_in_multi($key, $value) : $result;
if ($result) return $result;
}
return $result;
}
This simple few lines function returns true if it finds any key from the array.
Example of the function:
if we pass this array as a parameter in the function, we can get the expected result.
$arr = array(
'1' => 100,
'2' => array(
'16' => 200,
'18' => array(
'example' => 100,
'101' => 101
),
),
'3' => 400
);
print array_key_exists_in_multi('example', $arr); //Output is: 1
print array_key_exists_in_multi('16', $arr); //Output is: 1
print array_key_exists_in_multi('2', $arr); //Output is: 1
print array_key_exists_in_multi('20', $arr); //Output is: 0
[0] => Array