Online PHP editor | output for vGXX1

<?php function hasChanged($array1, $array2) { return ( !empty(array_diff_assoc($array1, $array2)) || !empty(array_diff_assoc($array2, $array1)) ); } echo "Set 1\n"; $array1 = array("a" => "green", "b" => "brown", "c" => "blue"); $array2 = array("a" => "green", "b" => "brown2", "c" => "blue2"); $result = array_diff_assoc($array1, $array2); print_r($result); $result = array_diff_assoc($array2, $array1); print_r($result); var_dump(hasChanged($array1, $array2)); echo "Set 2\n"; $array3 = array("a" => "green", "b" => "brown", "c" => "blue"); $array4 = array("a" => "green", "b" => "brown", "c" => "blue", "e" => "bluee"); $result2 = array_diff_assoc($array3, $array4); print_r($result2); $result2 = array_diff_assoc($array4, $array3); print_r($result2); var_dump(hasChanged($array3, $array4)); echo "Set 3\n"; $array5 = array("a" => "green", "b" => "brown", "c" => "blue"); $array6 = array("a" => "green", "b" => "brown", "c" => "blue"); $result3 = array_diff_assoc($array5, $array6); print_r($result3); $result3 = array_diff_assoc($array6, $array5); print_r($result3); var_dump(hasChanged($array5, $array6));