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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

In PHP, there are two versions of logical AND and OR operators.

Operator True if
$a and $b Both $a and $b are true
$a && $b Both $a and $b are true
$a or $b Either $a or $b is true
$a || $b Either $a or $b is true

Note that the && and || opererators have higher precedence than and and or. See table below:

Evaluation Result of $e Evaluated as
$e = false || true True $e = (false || true)
$e = false or true False ($e = false) or true

Because of this it's safer to use && and || instead of and and or.