Get difference between associative rows of two 2-dimensional arrays

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To check multi-deminsions try something like this:

$pageWithNoChildren = array_map('unserialize',
    array_diff(array_map('serialize', $pageids), array_map('serialize', $parentpage)));
  • array_map() runs each sub-array of the main arrays through serialize() which converts each sub-array into a string representation of that sub-array
    • the main arrays now have values that are not arrays but string representations of the sub-arrays
  • array_diff() now has a one-dimensional array for each of the arrays to compare
  • after the difference is returned array_map() runs the array result (differences) through unserialize() to turn the string representations back into sub-arrays

Q.E.D.

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