Comparison of strings in php

Source: Internet
Author: User
Tags constant strcmp

Use strcmp () function strings for comparison


Int strcmp (string str1, string str2 ))
The str1 and str2 parameters define the two strings to be compared. If they are equal, 0 is returned. If str1 is greater than str2, the return value is greater than 0. If str1 is smaller than str2, the return value is less than 0.

Instance:

The code is as follows: Copy code
<? Php
$ Str1 = "a"; // defines a string constant
$ Str2 = "B"; // defines a string constant.
$ Str3 = "ccc"; // defines a string constant.
$ Str4 = "CCC"; // defines a string constant.
Echo strcmp ($ str1, $ str2); // The two strings are equal.
Echo strcmp ($ str3, $ str4); // note that this function is case sensitive.
?>

Note: This function is case sensitive.

Use = for comparison

The code is as follows: Copy code

$ A = "joe ";
$ B = "jerry ";
If ($! = $ B)
{
Echo "not equal ";
}
Else
{
Echo "equal ";
}

For more details, see: http://www.111cn.net/phper/php-function/35413.htm

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