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: http://old.master.cmc.msu.ru/php/function.strnatcmp.html
Дата изменения: Sun Feb 3 22:56:31 2002 Дата индексирования: Tue Oct 2 03:43:08 2012 Кодировка: |
This function implements a comparison algorithm that orders alphanumeric strings in the way a human being would, this is described as a "natural ordering". An example of the difference between this algorithm and the regular computer string sorting algorithms (used in strcmp()) can be seen below:
$arr1 = $arr2 = array("img12.png","img10.png","img2.png","img1.png"); echo "Standard string comparison\n"; usort($arr1,"strcmp"); print_r($arr1); echo "\nNatural order string comparison\n"; usort($arr2,"strnatcmp"); print_r($arr2); |
Standard string comparison Array ( [0] => img1.png [1] => img10.png [2] => img12.png [3] => img2.png ) Natural order string comparison Array ( [0] => img1.png [1] => img2.png [2] => img10.png [3] => img12.png ) |
Similar to other string comparison functions, this one returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.
Note that this comparison is case sensitive.
See also ereg(), strcasecmp(), substr(), stristr(), strcmp(), strncmp(), strncasecmp(), strnatcasecmp(), strstr(), natsort() and natcasesort().