PHP strnatcasecmp() Function (original) (raw)

Last Updated : 22 Jun, 2023

The strnatcasecmp() function is a built-in function in PHP which compares this string using "natural order" algorithm. This function accepts two strings as parameter and returns an integer value (positive, negative or zero ). This function is similar to strnatcmp() with the only difference being the case-insensitivity of the function.Syntax:

strnatcasecmp( string1,string1, string1,string2 )

Parameters: The function accepts two mandatory string parameters as shown in the above syntax. These parameters are defined below :

• $string1: This parameter specifies the first string to be compared.
• $string2: This parameter specifies the second string to be compared.

Return Values: This function returns a positive integer, negative or 0 based on the below conditions:

• Returns 0 if the two strings are equal
• Returns a positive value (>0) if the string1isgreaterthanstring1 is greater than string1isgreaterthanstring2.
• Returns a **negative value (<0)** if the string1islessthanstring1 is less than string1islessthanstring2.

Examples:

Input : string="Geek",string = "Geek", string="Geek",string2 = "GEEK" Output : 0

Input : string="Geeks",string = "Geeks", string="Geeks",string2 = "Geek" Output : 1

Below programs illustrate the strnatcasecmp() function:Program 1: This program illustrates simple use of the strnatcasecmp() function.

php `

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Output

1

Program 2: This program illustrates case-insensitivity of the strnatcasecmp() function.

php `

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Output

0 1