PHP strncmp() Function

In this chapter you will learn:

1. Definition for PHP strncmp() Function
2. Syntax for PHP strncmp() Function
3. Parameter for PHP strncmp() Function
4. Return for PHP strncmp() Function
5. Example - Compare two strings
6. Example - Compare two string values for the first 6 characters

Definition

The strncmp() function compares two strings case-sensitive for specified length.

Syntax

PHP strncmp() Function has the following syntax.

Parameter

Return

This function returns:

• 0 - if the two strings are equal
• <0 - if string1 is less than string2
• >0 - if string1 is greater than string2

Example 1

Compare two strings (case-sensitive):

<?php
echo strncmp("Hello world!","Hello earth!",6);
?>

The code above generates the following result.

Example 2

Compare two strings (case-sensitive = Hello and hELLo will not output the same):

<?php//  j  a  v  a 2s.c o  m
echo strncmp("Hello","Hello",6);
echo "<br>";
echo strncmp("Hello","hELLo",6);
?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

1. Definition for PHP strpbrk() Function
2. Syntax for PHP strpbrk() Function
3. Parameter for PHP strpbrk() Function
4. Return for PHP strpbrk() Function
5. Example - Search a string for the characters "oe"
6. Example - Search illegal characters in user name
7. Example - case-sensitive search

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