PHP strnatcmp function "Natural sorting algorithm" for string comparison usage analysis comparison strcmp function

This example describes the use of the STRNATCMP () function "Natural sorting algorithm" in PHP for string comparison. Share to everyone for your reference, as follows:

The strnatcmp () function in PHP uses a "natural" algorithm to compare two strings (case-sensitive), usually in natural algorithms, where the number 2 is less than the number 10. In the computer sort, 10 is less than 2, because the first number in 10 is less than 2.

The strnatcmp () function is defined as follows:

STRNATCMP (STRING1,STRING2)

Parameter description:

String1 required. Specifies the first string to compare.
string2 required. Specifies a second string to compare.

Return Value Description:

If two strings are equal, the return value is 0
If string1 is less than string2, the return value is less than 0
If string1 is greater than string2, the return value is greater than 0

The sample code is as follows:

<?php $str 1= "2.jpg"; $str 2= "10.jpg"; $str 3= "Jb51.net_1"; $str 4= "Jb51.net_2"; Echo strcmp ($str 1, $str 2);//Compare by Byte, return 1 echo "
"; Echo strcmp ($str 3, $str 4);//Compare by Byte, return 1 echo "
"; Echo strnatcmp ($str 1, $str 2);//Compare by "natural sort" method, return-1 echo "
"; Echo strnatcmp ($str 3, $str 4);//Compare by "natural sort" method, return 1?>

The results of the operation are as follows:

11-11

Read more about PHP string Operations For more information on this site: PHP string Usage Summary

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