How to Find Differences Between Associative Rows of Two Multidimensional Arrays in PHP?

Retrieve Differences Between Associative Rows of Two Multidimensional Arrays

In PHP, we can leverage array functions to compare and identify differences between arrays. Consider the need to find the information present in $pageids but not in $parentpage. However, using array_diff_assoc() alone may not suffice in this scenario.

To effectively compare the nested arrays, we can employ a combination of techniques:

$serializedPageIds = array_map('serialize', $pageids);
$serializedParentPage = array_map('serialize', $parentpage);

$pageWithNoChildren = array_map('unserialize',
    array_diff($serializedPageIds, $serializedParentPage));

This approach involves the following steps:

1. Serialize Multidimensional Arrays: Using array_map('serialize', ...), we convert the multidimensional arrays $pageids and $parentpage into one-dimensional arrays containing string representations of each sub-array.
2. Compare Serialized Arrays: array_diff() compares the one-dimensional arrays created in step 1, identifying the differences between them.
3. Unserialize Differences: After the differences are identified, array_map('unserialize', ...) is applied to convert the string representations back into sub-arrays, resulting in the desired output.

The result, $pageWithNoChildren, will contain the associative rows from $pageids that are not present in $parentpage. This technique allows for efficient and accurate comparison of nested arrays.

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