Sort array maintaining index association

# Collator::asort

# collator_asort

(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)

Collator::asort -- collator_asort — Sort array maintaining index association

### 说明

面向对象风格

public function Collator::asort(array `&$array`, int `$flags` = `Collator::SORT_REGULAR`): bool

过程化风格

function collator_asort(Collator `$object`, array `&$array`, int `$flags` = `Collator::SORT_REGULAR`): bool

This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant. Array elements will have sort order according to current locale rules.

Equivalent to standard PHP asort().

### 参数

`object`

  Collator object.

`array`

  Array of strings to sort.

`flags`

  Optional sorting type, one of the following:

  - `Collator::SORT_REGULAR` - compare items normally (don't change types)

  - `Collator::SORT_NUMERIC` - compare items numerically

  - `Collator::SORT_STRING` - compare items as strings

  Default `flags` value is `Collator::SORT_REGULAR`. It is also used if an invalid `flags` value has been specified.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 示例

示例 #1 collator_asort() example

    <?php
    $coll = collator_create( 'en_US' );
    $arr = array(
         'a' => '100',
         'b' => '50',
         'c' => '7'
    );
    collator_asort( $coll, $arr, Collator::SORT_NUMERIC );
    var_export( $arr );

    collator_asort( $coll, $arr, Collator::SORT_STRING );
    var_export( $arr );
    ?>

以上示例会输出：

    array (
      'c' => '7',
      'b' => '50',
      'a' => '100',
    )array (
      'a' => '100',
      'b' => '50',
      'c' => '7',
    )

### 参见

- Collator constants
- collator_sort() - Sort array using specified collator
- collator_sort_with_sort_keys() - Sort array using specified collator and sort keys

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