ArrayObject::natsort

(PHP 5 >= 5.2.0)

ArrayObject::natsort — Sort entries using a "natural order" algorithm

说明

public void ArrayObject::natsort ( void )

This method implements a sort algorithm that orders alphanumeric strings in the way a human being would while maintaining key/value associations. This is described as a "natural ordering". An example of the difference between this algorithm and the regular computer string sorting algorithms (used in ArrayObject::asort) method can be seen in the example below.

参数

此函数没有参数。

返回值

没有返回值。

范例

Example #1 ArrayObject::natsort() example

  <?php
$array  = array( "img12.png" ,  "img10.png" ,  "img2.png" ,  "img1.png" );

 $arr1  = new  ArrayObject ( $array );
 $arr2  = clone  $arr1 ;

 $arr1 -> asort ();
echo  "Standard sorting\n" ;
 print_r ( $arr1 );

 $arr2 -> natsort ();
echo  "\nNatural order sorting\n" ;
 print_r ( $arr2 );
 ?>

以上例程会输出：

Standard sorting
ArrayObject Object
(
    [3] => img1.png
    [1] => img10.png
    [0] => img12.png
    [2] => img2.png
)Natural order sorting
ArrayObject Object
(
    [3] => img1.png
    [2] => img2.png
    [1] => img10.png
    [0] => img12.png
)

For more information see: Martin Pool's » Natural Order String Comparison page.

参见

ArrayObject::asort() - Sort the entries by value
ArrayObject::ksort() - Sort the entries by key
ArrayObject::natcasesort() - Sort an array using a case insensitive "natural order" algorithm
ArrayObject::uasort() - Sort the entries with a user-defined comparison function and maintain key association
ArrayObject::uksort() - Sort the entries by keys using a user-defined comparison function