PHP strncmp() Function (original) (raw)
Last Updated : 22 Jun, 2023
The strncmp() is an inbuilt function in PHP which is used to compare first n character of two strings. This function is case-sensitive which points that capital and small cases will be treated differently, during comparison. This function compares two strings with first n character and tells whether the first string is greater or smaller or equal to the second string.
int strncmp( str1,str1, str1,str2, $len )
Parameters: This function accepts three parameters as mentioned above and described below:
- $str1: It is mandatory parameter. This parameter refers to the first string to be used in the comparison.
- $str2: It is mandatory parameter. This parameter refers to the second string to be used in the comparison.
- $len: It is mandatory parameter which is used to define the first $len number of characters compared.
Return Value: This function returns a random integer value depending on the comparison of string which is given below:
- Returns 0 if the first n character of both strings are equal.
- Returns a negative value ( < 0), if the first n character of string2isgreaterthanstring2 is greater than string2isgreaterthanstring1.
- Returns a positive value ( > 0), if the first n character of string1isgreaterthanstring1 is greater than string1isgreaterthanstring2.
Below programs illustrate the strncmp() function in PHP.
Program 1:
PHP
<?php
$str1 = "Welcome to GFG" ;
$str2 = "Welcome to GeeksforGeeks" ;
$str3 = "Welcome" ;
print_r( strncmp ( $str1 , $str3 , 7));
echo "\n" ;
print_r( strncmp ( $str2 , $str1 , 14));
echo "\n" ;
print_r( strncmp ( $str3 , $str2 , 10))
?>
Program 2:
PHP
<?php
$str1 = "GeeksforGeeks" ;
$str2 = "geeksforgeeks" ;
print_r( strncmp ( $str1 , $str2 , 13));
?>
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