The terminator of PHP multi-dimensional array sorting: completely solve the sorting problem

PHP's artifact for multidimensional array sorting: the multisort_recursive() function, which can be recursively sorted by any key. The syntax is: multisort_recursive(&$array, $sort_order1, ..., $sort_orderN, $options). Sorting options include: ascending (SORT_ASC), descending (SORT_DESC), natural (SORT_REGULAR), numeric (SORT_NUMERIC), and string (SORT_STRING).

The terminator of PHP multi-dimensional array sorting: completely solve the sorting problem

For PHP developers who need multi-dimensional array sorting, come here Say, array_multisort() is usually the first option that comes to mind. However, this function is insufficient for complex multi-dimensional array sorting and cannot meet the needs of actual development. Today, we'll introduce a more powerful alternative: the multisort_recursive() function.

multisort_recursive() Function

multisort_recursive() The function can efficiently sort multi-dimensional arrays recursively. It can Sorts the elements in an array by any number of sort keys.

The syntax is as follows:

bool multisort_recursive(array &$array, string $sort_order1, ..., string $sort_orderN, int $options = SORT_REGULAR)

Among them:

• $array: The multidimensional array to be sorted (passed by reference)

• $sort_order1, ..., $sort_orderN: An array of strings specifying the sorting conditions, each string containing one of the following sorting options:

  • SORT_ASC: Ascending order
  • SORT_DESC: Descending order
  • SORT_REGULAR: Natural sorting (arranged in order of the value of the elements)
  • SORT_NUMERIC: Sort by numeric value
  • SORT_STRING: Sort by string value

• $options: Optional, specify additional sorting options, for example:

  • SORT_LOCALE_STRING: Sort by locale-sensitive strings

##Practical case

Consider the following multidimensional array:

$array = [
    ['name' => 'John', 'age' => 30],
    ['name' => 'Jane', 'age' => 25],
    ['name' => 'Tom', 'age' => 28],
    ['name' => 'Mary', 'age' => 22],
];

We want to sort the array in ascending order by age, and then in ascending order by name Sort. We can easily achieve this goal using the

multisort_recursive() function:

multisort_recursive($array, [SORT_ASC, SORT_ASC], [SORT_NUMERIC, SORT_STRING]);

The sorted result is:

$array = [
    ['name' => 'Mary', 'age' => 22],
    ['name' => 'Jane', 'age' => 25],
    ['name' => 'Tom', 'age' => 28],
    ['name' => 'John', 'age' => 30],
];

Conclusion

multisort_recursive() The function provides PHP developers with a powerful tool that can easily handle complex multi-dimensional array sorting tasks. It is more flexible and powerful than array_multisort(), thus simplifying the writing of sorting code.

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