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--TEST-- Test asort() function : usage variations - sort array with diff. sub arrays, 'sort_flags' as default/SORT_REGULAR --FILE-- <?php /* Prototype : bool asort ( array &$array [, int $sort_flags] ) * Description: Sort an array and maintain index association. Elements will be arranged from lowest to highest when this function has completed. * Source code: ext/standard/array.c */ /* * testing asort() by providing arrays contains sub arrays for $array argument with flowing flag values * flag value as default * SORT_REGULAR - compare items normally * Note: arrays are sorted based on total count of elements inside it, when all the elements are arrays */ echo "*** Testing asort() : usage variations ***\n"; // array of arrays $various_arrays = array ( // null array "array[0]" => array(), // array contains null sub array "array[1]" => array( "sub_array[1][0]" => array() ), // array of arrays along with some values "array[2]" => array("data[2,0]" => 44, "data[2,1]" => 11, "sub_array[2][0] " => array(64,61) ), // array contains sub arrays "array[3]" => array ( "sub_array[3][0]" => array(33,-5,6), "sub_array[3][1]" => array(11), "sub_array[3][2]" => array(22,-55), "sub_array[3][3]" => array() ) ); $count = 1; echo "\n-- Testing asort() by supplying various arrays containing sub arrays --\n"; // loop through to test asort() with different arrays foreach ($various_arrays as $array) { echo "\n-- Iteration $count --\n"; // testing asort() function by supplying different arrays, flag value is default echo "- With default sort_flag -\n"; $temp_array = $array; var_dump(asort($temp_array) ); var_dump($temp_array); // testing asort() function by supplying different arrays, flag value = SORT_REGULAR echo "- Sort_flag = SORT_REGULAR -\n"; $temp_array = $array; var_dump(asort($temp_array, SORT_REGULAR) ); var_dump($temp_array); $count++; } echo "Done\n"; ?> --EXPECTF-- *** Testing asort() : usage variations *** -- Testing asort() by supplying various arrays containing sub arrays -- -- Iteration 1 -- - With default sort_flag - bool(true) array(0) { } - Sort_flag = SORT_REGULAR - bool(true) array(0) { } -- Iteration 2 -- - With default sort_flag - bool(true) array(1) { ["sub_array[1][0]"]=> array(0) { } } - Sort_flag = SORT_REGULAR - bool(true) array(1) { ["sub_array[1][0]"]=> array(0) { } } -- Iteration 3 -- - With default sort_flag - bool(true) array(3) { ["data[2,1]"]=> int(11) ["data[2,0]"]=> int(44) ["sub_array[2][0] "]=> array(2) { [0]=> int(64) [1]=> int(61) } } - Sort_flag = SORT_REGULAR - bool(true) array(3) { ["data[2,1]"]=> int(11) ["data[2,0]"]=> int(44) ["sub_array[2][0] "]=> array(2) { [0]=> int(64) [1]=> int(61) } } -- Iteration 4 -- - With default sort_flag - bool(true) array(4) { ["sub_array[3][3]"]=> array(0) { } ["sub_array[3][1]"]=> array(1) { [0]=> int(11) } ["sub_array[3][2]"]=> array(2) { [0]=> int(22) [1]=> int(-55) } ["sub_array[3][0]"]=> array(3) { [0]=> int(33) [1]=> int(-5) [2]=> int(6) } } - Sort_flag = SORT_REGULAR - bool(true) array(4) { ["sub_array[3][3]"]=> array(0) { } ["sub_array[3][1]"]=> array(1) { [0]=> int(11) } ["sub_array[3][2]"]=> array(2) { [0]=> int(22) [1]=> int(-55) } ["sub_array[3][0]"]=> array(3) { [0]=> int(33) [1]=> int(-5) [2]=> int(6) } } Done