w3resource

PHP: strncmp() function

Description

The strncmp() function compare two strings of the first n characters.

Note : The comparison is case sensitive.

Version:

(PHP 4 and above)

Syntax:

strncmp(string1, string2, no_of_characters)

Parameters:

Name Description Required /
Optional		 Type
string1 The first string. Required String
string2 The second string. Required String
no_of_characters Specified the number of characters from each string to be used in the comparison. Required Integer

Return value:

< 0 if string1 < string2.
> 0 if string1 > string2.
0 if string1 = string2.

Value Type: Integer.

Example: 

<?php
echo strncmp('Hello John...', 'Hello Anirban....', 6);
?>

Output :

0

View the example in the browser

See also

PHP Function Reference

Previous: strncasecmp
Next: strrchr



PHP: Tips of the Day

A resource is a special type of variable that references an external resource, such as a file, socket, stream, document, or connection

Example:

$file = fopen('/etc/passwd', 'r');
echo gettype($file);
# Out: resource
echo $file;
# Out: Resource id #2

There are different (sub-)types of resource. You can check the resource type using get_resource_type():

$file = fopen('/etc/passwd', 'r'); 
echo get_resource_type($file);
#Out: stream
$sock = fsockopen('www.google.com', 80);
echo get_resource_type($sock);
#Out: stream