Here’s a code snippet to flatten or merge multidimensional array. This is useful when we need to find if a value exists in any of the nodes in a multidimensional array.
I use this function in my Paid Content Packages WordPress Plugin to find out if any of the packages have any page or post assigned.
PHP Function:
function flattenArray($arrayToFlatten) {
$flatArray = array();
foreach($arrayToFlatten as $element) {
if (is_array($element)) {
$flatArray = array_merge($flatArray, flattenArray($element));
} else {
$flatArray[] = $element;
}
}
return $flatArray;
}Example:
$array = array( 'parent-one' => 'parent-one', 'parent-two' => 'parent-two', 'parent-three' => array( 'child-one' => 'child-one', 'child-two' => 'child-two', 'child-three' => array( 'kid-one' => 'kid-one', 'kid-two' => 'kid-two', ), ), ); print_r(flattenArray($array));
This code will print the following output.
Array
(
[0] => parent-one
[1] => parent-two
[2] => child-one
[3] => child-two
[4] => kid-one
[5] => kid-two
)There are shorter versions of this function available, however, I like to use the code which is clear and easy to read. Hope this helps you if you are finding a solution to this.
Mohit Aneja
I am an experienced designer and developer with a solid knowledge & experience of current web and mobile technology. I am a problem solver at heart and strive to develop the most effective solutions at the highest of standards and current technology.
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