The strncmp () function in PHP compares the first 2 characters of two strings with the same method _php tips

The example in this article describes how the STRNCMP () function in PHP compares the first 2 characters of a two string to be equal. Share to everyone for your reference, specific as follows:

The strncmp () function in PHP is used to compare two strings (case-sensitive) to determine whether the first n characters of two strings are equal.

The strncmp () function is defined as follows:

STRNCMP (String1,string2,length)

Parameter description:

String1 required. Specify the first string to compare.
string2 required. Specify the second string to compare.
Length required. Specify the number of characters for each string used in the comparison.

Return Value Description:

If two strings are equal, the return value is 0
If string1 is less than string2, the return value is less than 0
If string1 is greater than string2, the return value is greater than 0

The sample code is as follows:

<?php
/* STRNCMP () function compares two string first n characters equal * *
 return value:
 0-if two strings are equal
 <0-if string1 is less than string2
 >0-if string1 is greater than string2
 * * *
 $str 1= "Welcome to Www.jb51.net";
 $str 2= "WELCOME to WWW.JB51.NET";
 $str 3= "Welcome to PHP";
 Echo strncmp ($str 1, $str 2,2);
 echo "<br/>";
 Echo strncmp ($str 1, $str 3,2);
>

The results of the operation are as follows:

1
0

More about PHP string operations related to the site to see the topic: "PHP string (String) Usage Summary"

I hope this article will help you with the PHP program design.