PHP - Get the value by key in a multi-dimension array - php

Question

I have a multi-dimension array like:
$fields =
Array (
[1] => Array
(
[field_special_features5_value] => Special Function 5
)
[2] => Array
(
[field_special_features6_value] => Special Function 6
)
[3] => Array
(
[field_opticalzoom_value] => Optical Zoom
)
)
I want to get the value by key, I tried the code below but not work
$tmp = array_search('field_special_features5_value' , $fields);
echo $tmp;
How can I get the value Special Function 5 of the key field_special_features5_value?
Thanks

Answer 1

print $fields[1]['field_special_features5_value'];
or if you don't know at which index your array is, something like this:
function GetKey($key, $search)
{
foreach ($search as $array)
{
if (array_key_exists($key, $array))
{
return $array[$key];
}
}
return false;
}
$tmp = GetKey('field_special_features5_value' , $fields);
echo $tmp;

Answer 2

If you know where it is located in the $fields array, try :
$value = $fields[1]['field_special_features5_value'];
If not, try :
function getSubkey($key,$inArray)
{
for ($fields as $field)
{
$keys = array_keys($field);
if (isset($keys[$key])) return $keys[$key];
}
return NULL;
}
And use it like this :
<?php
$value = getSubkey("field_special_features5_value",$fields);
?>

Answer 3

You need to search recursive:
function array_search_recursive(array $array, $key) {
foreach ($array as $k => $v) {
if (is_array($v)) {
if($found = array_search_recursive($v, $key)){
return $found;
}
} elseif ($k == $key) {
return $v;
} else {
return false;
}
}
}
$result = array_search_recursive($fields, 'field_special_features5_value');

Answer 4

Your problem is that you have a top-level index first before you can search you array. So to access that value you need to do this:
$tmp = $fields[1]['field_special_features5_value'];

Answer 5

You can do it with recursive function like this
<?php
function multi_array_key_exists($needle, $haystack) {
foreach ($haystack as $key=>$value) {
if ($needle===$key) {
return $key;
}
if (is_array($value)) {
if(multi_array_key_exists($needle, $value)) {
return multi_array_key_exists($needle, $value);
}
}
}
return false;
}
?>