Access uneven high leveled associative array in php - php

Question

I have nested associative array with more than 4 levels. Some values goes to all 4 levels while some ends on first level. Now how do I access all values from php.
For 2 levels array I can just:
foreach($options as $o){
foreach($m as $check){
if(isset($check[$o])) echo $check[$o];
}
}
to check if a value is set and then use it.
But how do I do this for the array having unknown depth or a lot of levels with uneven level.

Answer 1

It depends by what you mean with 'access'. If you just want to print out the values you could use a recursive function like this:
function crawlArray($myArray, $depth=0) {
foreach ($myArray as $k => $v) {
if (is_array($v)) {
crawlArray($v, ++$depth);
} else {
echo $v;
}
}
}
crawlArray($options);

Answer 2

You can use a recursive function as so:
<?php
function getSetValues($array, $searchKeys) {
$values = array();
foreach ($array as $key => $value) {
if (is_array($value)) {
$values = array_merge($values, getSetValues($value, $searchKeys));
} else if (in_array($key, $searchKeys)) {
$values[] = $value;
}
}
return $values;
}
$values = getSetValues(array(
'foo' => array(
'bar' => 123,
'rab' => array(
'oof' => 'abc'
),
'oof' => 'cba'
),
'oof' => 912
), array('bar', 'oof')); //Search for keys called 'bar' or 'oof'
print_r($values);
?>
Which will output:
Array
(
[0] => 123 (because the key is 'bar')
[1] => abc (because the key is 'oof')
[2] => cba (because the key is 'oof')
[3] => 912 (because the key is 'oof')
)
DEMO