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PHP strnatcasecmp() Function

PHP strnatcasecmp() function is used to compare two given strings using the "natural order" algorithm. It accepts two strings as input parameter and returns an integer value as output. It is similar to strnatcmp() but the only difference is strnatcasecmp() function is case-insensitive.

Syntax:

strnatcasecmp( $string1, $string2);

Parameter Values

Parameter	Description
string1	This is a required parameter. This parameter defines the first string to compare.
string2	This is a required parameter. This parameter defines the second string to compare.

Here is an example of strnatcasecmp() function in PHP:

<html>
<body>

<?php
echo strnatcasecmp("PHPTPOINT","php");
echo "<br>";
echo strnatcasecmp("PhpPOint","PHPTPOINT");
echo "<br>";
echo strnatcasecmp("PhpTpoint","PHPTPOINT");

?>

</body>
</html>

Output:
1
-1
0

Here is an another example of strnatcasecmp() function in PHP:

<html>
<body>

<pre>
<?php
$arr1 = $arr2 = array("1","2","10","001","1000","20","130","200");

echo "Standard string comparison"."<br>";
usort($arr1,"strcmp");

print_r($arr1);

echo "<br>";
echo "<br>";

echo "Natural order string comparison"."<br>";
usort($arr2,"strnatcmp");

print_r($arr2);
?>
</pre>

</body>
</html>

Output:
Standard string comparison
Array
(
[0] => 001
[1] => 1
[2] => 10
[3] => 1000
[4] => 130
[5] => 2
[6] => 20
[7] => 200
)

Natural order string comparison
Array
(
[0] => 1
[1] => 001
[2] => 2
[3] => 10
[4] => 20
[5] => 130
[6] => 200
[7] => 1000
)

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