Php array multisort
From w3cyberlearnings
PHP function array_multisort
This function sorts one or more arrays and it bases on the first array. All the arrays must have the same length.
Syntax array_multisort
- array1 : first array to be sort
- sorting order (optional): SORT_ASC (default, sorting in ascending order A-Z), SORT_DESC (sorting in descending order Z-A)
- sorting type (optional): SORT_REGULAR (default, compare element), SORT_NUMERIC (numeric values), SORT_STRING (string value)
- array2 (optional): second array (based on the sorting in array1)
- array3 (optional): third array (based on the sorting in array1)
array_multisort(array1, sorting order, sorting type, array2 , array3);
Example 1: sorting with default option
<?php
$list1 = array('banana', 'coconut', 'mango', 'apple');
array_multisort($list1);
print_r($list1);
?>
Output
Array
(
[0] => apple
[1] => banana
[2] => coconut
[3] => mango
)
Example 2: sorting with two arrays
<?php
$list1 = array('banana', 'coconut', 'mango', 'apple');
$list2 = array('lunch', 'dinner', 'breakfast','meal');
array_multisort($list1, $list2);
print_r($list1);
print_r($list2);
?>
Output
Array
(
[0] => apple
[1] => banana
[2] => coconut
[3] => mango
)
Array
(
[0] => meal
[1] => lunch
[2] => dinner
[3] => breakfast
)
Example 3: sorting with duplicated values
<?php
$list1 = array('banana', 'coconut', 'mango', 'apple', 'banana');
array_multisort($list1);
print_r($list1);
?>
Output
Array
(
[0] => apple
[1] => banana
[2] => banana
[3] => coconut
[4] => mango
)
Example 4: merge two arrays and do the sorting
<?php $score1 = array(30, 40, 58); $score2 = array(40, 20, 5); $score = array_merge($score1, $score2); array_multisort($score, SORT_DESC, SORT_NUMERIC); print_r($score); ?>
Output
Array
(
[0] => 58
[1] => 40
[2] => 40
[3] => 30
[4] => 20
[5] => 5
)
Example 5: sort string type
<?php
$list1 = array('Canana', 'Coconut', 'Mango', 'apple','APPLE');
$all_lower = array_map('strtolower', $list1);
array_multisort($all_lower, SORT_ASC, SORT_STRING, $list1);
print_r($list1);
print_r($all_lower);
?>
Output
Array
(
[0] => APPLE
[1] => apple
[2] => Canana
[3] => Coconut
[4] => Mango
)
Array
(
[0] => apple
[1] => apple
[2] => canana
[3] => coconut
[4] => mango
)
Example 6
<?php $score1 = array(10, 9, 8, 7, 6, 5); $score2 = array(100, 900, 800, 700, 600, 500000); $score3 = array(11, 99, 88, 77, 66, 55); array_multisort($score1, SORT_ASC, SORT_NUMERIC, $score2, $score3 ); print_r($score1); print_r($score2); print_r($score3); ?>
Output
Array
(
[0] => 5
[1] => 6
[2] => 7
[3] => 8
[4] => 9
[5] => 10
)
Array
(
[0] => 500000
[1] => 600
[2] => 700
[3] => 800
[4] => 900
[5] => 100
)
Array
(
[0] => 55
[1] => 66
[2] => 77
[3] => 88
[4] => 99
[5] => 11
)
Related Links
- array_change_key_case
- array_chunk
- array_combine
- array_count_values
- array_diff_assoc
- array_diff_key
- array_diff_uassoc
- array_diff_ukey
- array_diff
- array_fill_keys
- array_fill
- array_filter
- array_flip
- array_intersect_assoc
- array_intersect_key
- array_intersect_uassoc
- array_intersect_ukey
- array_intersect
- array_key_ exists
- array_keys
