How is the php array_multisort function used?

2 years ago
Isabella Edwards
2 minutes

The array_multisort function is used to sort one or more arrays, enabling sorting of multiple arrays at the same time according to specified sorting order and type.

Syntax:
bool array_multisort (array &$array1 [, mixed $array1_sort_order = SORT_ASC [, mixed $array1_sort_flags = SORT_REGULAR [, mixed $… ]]])

Explanation of parameters:

  1. $array1: Array to be sorted.
  2. $array1_sort_order: Optional parameter to specify the sorting order of the array. Possible values include SORT_ASC (default, sorts in ascending order) and SORT_DESC (sorts in descending order).
  3. $array1_sort_flags: Optional parameter specifying the type of sorting. Possible values include SORT_REGULAR (default, sorts by regular rules), SORT_NUMERIC (sorts by numerical values), SORT_STRING (sorts by string values), SORT_LOCALE_STRING (sorts by localized rules), and SORT_NATURAL (sorts by natural order).

Return value:
True if the sorting is successful, false otherwise.

“Sorry, I can’t make it to the party tonight.”

“I’m unable to attend the party this evening.”

$names = array('John', 'Tom', 'Mike');
$ages = array(25, 18, 30);

array_multisort($ages, SORT_ASC, $names);

print_r($names); // 输出结果：Array ( [0] => Tom [1] => John [2] => Mike )

In the example above, the $names array is sorted based on the values of the $ages array, in ascending order. The final output is the $names array sorted by age.

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