How to use the sort() function in php (with code examples)

In

php we often need to operate arrays. Sometimes we may need to sort the array. In this case, we need to use the built-in function sort() in php. This article will take you to take a look.

sort    ( array $array   , int $sort_flags = SORT_REGULAR   )

• $array: The array to be sorted.

• $sort_flags: The optional second parameter $sort_flags can change the behavior of sorting with the following values: SORT_REGULAR - normal comparison of cells; SORT_NUMERIC - cells are compared as numbers; SORT_STRING - Cells are compared as strings; SORT_LOCALE_STRING - Cells are compared as strings according to the current locale setting, which can be changed with setlocale(). SORT_NATURAL - Like natsort(), sorts strings in "natural order" per unit. SORT_FLAG_CASE - can be combined with SORT_STRING or SORT_NATURAL (OR bitwise operation) to sort strings in a case-insensitive manner.

• Return value: Return true on success, or return false on failure.

Code example

1. Normal comparison unit

<?php

$arr=array("a"=>"c张三","c"=>"b李四","b"=>"a王五");
sort($arr);
print_r($arr);

?>

2. Sort the strings in "natural order"

输出;Array ( [0] => a王五 [1] => b李四 [2] => c张三 )

<?php

$arr=array("a"=>"A张三","c"=>"b李四","b"=>"a王五");
sort($arr, SORT_NATURAL | SORT_FLAG_CASE);
print_r($arr);

?>

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