Definition and Usage
Definition and usage
The strnatcmp() function compares two strings using a "natural" algorithm.
The function of the strnatcmp() function is to use natural algorithms to compare strings (case sensitive).
In a natural algorithm, the number 2 is less than the number 10. In computer sorting, 10 is less than 2, because the first number in "10" is less than 2.
In the "Natural Algorithm Rules", 2 is smaller than 10. In a computer sequence, 10 is smaller than 2 because the first number in "10" is "1", which is less than 2.
This function returns:
This function will return the following values:
•0 - if the two strings are equal
0 – If the string is equal
•<0 - if string1 is less than string2
<0 – if string1 is less than string2
•>0 - if string1 is greater than string2
>0 – if string1 is greater than string2
Syntax
grammar
strnatcmp(string1,string2)
| Parameter parameters | Description |
|---|---|
| string1 | Required. Specifies the first string to compare Required parameters. Specify the first string object participating in the comparison |
| string2 | Required. Specifies the second string to compare Required parameters. Specify the second string object for parameter comparison |
Tips and Notes
Note
Note: The strnatcmp() is case-sensitive.
Note: The strnatcmp() function is case sensitive.
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Example
Case
<?phpecho strnatcmp("2Hello world!","10Hello world!");echo "<br />";echo strnatcmp("10Hello world!","2Hello world!");?>
The output of the code above will be:
The above code will output the following result: -1 1