How can I check if a key exists in the sub keys of an array? And if that key of the item is found then return that item?
For instance, I have this array,
Array
(
[0] => Array
(
[a] => Array
(
[quantity_request] => 1
[time_created] => 1339688613
[variant] => Array
(
)
)
)
[1] => Array
(
[b] => Array
(
[quantity_request] => 1
[time_created] => 1339688631
[variant] => Array
(
)
)
)
[2] => Array
(
[c] => Array
(
[quantity_request] => 1
[time_created] => 1339688959
[variant] => Array
(
)
)
)
)
I want to find key 'b' and return everything under it, like this is what I am after,
[b] => Array
(
[quantity_request] => 1
[time_created] => 1339688631
[variant] => Array
(
)
)
I try with this, but nothing returns,
if (array_key_exists('b', $this->content)) {
echo "The 'b' element is in the array";
}
Any ideas?
function get_letter($letter){
foreach($this->content as $v){
if(array_key_exists($letter, $v) {
return $v[$letter];
}
}
return false;
}
$array = get_letter('a');
Couldn't you just loop over the outer array, checking each array inside for the key?
foreach($this->content as $arr) {
if(array_key_exists('b', $arr) {
echo "Found it";
}
}
foreach() the root Array, then array_key_exists().
foreach ($array as $key => $value) {
if (array_key_exists('b', $array[$key])) {
return $array[$key]['b'];
}
}
The code here looks ok, but I wonder where the array is coming from or where it is defined? One suggestion that may narrow it down is to use is_array on $this->content to make sure it is a proper array.
I wouldn't actually use this because it's not clear code, but, it's a cool one liner for php 5.4
$val = call_user_func_array('array_merge', $array)['b'];