How to use php strncmp function?

php The strncmp function is used to compare two strings. Its syntax is strncmp(string1,string2,length). The parameter string1 is required and refers to the first string to be compared; string2 is required and refers to the second string to be compared. string.

php How to use strncmp function?

Definition and usage

strncmp() function compares two strings.

Note: strncmp() is binary safe and case-sensitive.

Tips: This function is similar to the strcmp() function, except that strcmp() does not have a length parameter.

Syntax

strncmp(string1,string2,length)

Parameters

string1 Required. Specifies the first string to compare.

string2 Required. Specifies the second string to be compared.

length Required. Specifies the number of characters of each string used in the comparison.

Return value:

This function returns:

0 - if the two strings are equal

<0 - if string1 is less than string2

>0 - if string1 is greater than string2

PHP version: 4

Example 1

Compare two String (case sensitive, China and CHINA output are different):

<?php
echo strncmp("China","China",6);
echo "<br>";
echo strncmp("China","CHINA",6);
?>

Output:

0
1

Example 2

Compare two strings (case sensitive):

<?php
echo strncmp("I love China!","I love Shanghai!",6);
?>

Output:

0

The above is the detailed content of How to use php strncmp function?. For more information, please follow other related articles on the PHP Chinese website!