PHP strnatcmp() function (original) (raw)
Last Updated : 22 Jun, 2023
The strnatcmp() is a built-in function on PHP. This function compares two strings using a "natural order" algorithm and return a positive integer, negative or zero. This function is case-sensitive.Syntax:
strnatcmp( string1,string1, string1,string2 )
Parameters: The functions accepts two mandatory string parameters for comparison as shown in the above syntax.
- $string1: This parameter specifies the first string to compare.
- $string 2: This parameter specifies the first string to compare.
Return Value: This function returns an integer value based on the following criteria:
- The function returns 0 if both the strings are equal.
- The function returns a **negative value(<0)** if string1islessthanstring1 is less than string1islessthanstring2.
- The function returns a positive value(>0) if string2islessthanstring2 is less than string2islessthanstring1.
Examples:
Input : string1="Hello",string1 = "Hello", string1="Hello",string2 = "HEllo" Output : 1
Input : string1="Geek",string1 = "Geek", string1="Geek",string2 = "Geeks" Output : -1
Below programs illustrate the strnatcmp() function in PHP : Program 1: This program shows simple use of the strnatcmp() function.
php `
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Output:
-1
Program 2: This program shows case-sensitivity of the strnatcmp() function.
php `
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Output:
1
Program 3: This program illustrates the difference between strcmp() and strnatcmp() functions.
php `
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Output:
-1 256
Explanation : In a natural algorithm, the number 2 is less than the number 10 whereas in computer sorting, 10 is considered to be less than 2 as the first number in "10" is less than 2.