توابع strnatcmp() PHP

PHP String Function

مثال

از "الطبیعی" برای مقایسه دو رشته (با توجه به بزرگ و کوچک بودن حروف) استفاده می‌شود:

<?php
echo strnatcmp("2Hello world!","10Hello world!");
echo "<br>";
echo strnatcmp("10Hello world!","2Hello world!");
?>

Run Instance

Definition and Usage

The strnatcmp() function uses a "natural" algorithm to compare two strings.

In natural algorithms, the number 2 is less than the number 10. In computer sorting, 10 is less than 2, because the first digit of 10 is less than 2.

Note:This function is case sensitive.

Syntax

strnatcmp(string1,string2)
Parameters Description
string1 Required. Specify the first string to be compared.
string2 Required. Specify the second string to be compared.

Technical Details

Return value:

This function returns:

  • 0 - If two strings are equal
  • <0 - If string1 Less than string2
  • >0 - If string1 Greater than string2
PHP Version: 4+

More Examples

Example 1

The difference between natural algorithm (strnatcmp) and conventional computer string sorting algorithm (strcmp):

<?php
$arr1 = $arr2 = array("pic1","pic2","pic10","pic01","pic100","pic20","pic30","pic200");
echo "Standard string comparison"."<br>";
usort($arr1,"strcmp");
print_r($arr1);
echo "<br>";
echo "Natural order string comparison"."<br>";
usort($arr2,"strnatcmp");
print_r($arr2);
?>

Run Instance

PHP String Function