PHP function strcasecmp() that compares two strings

Example

Compare two strings (case-insensitive):

<?php
echo strcasecmp("Hello world!","HELLO WORLD!");
?>

Definition and usage

strcasecmp() Function Compares two strings.

Tip: The strcasecmp() function is binary safe and is not case-sensitive.

Tip: This function is similar to the strncasecmp() function, except that with strncasecmp() you can specify the number of characters for each string to be compared.

Syntax

strcasecmp(string1,string2)

Parameters	Description
string1	Required. Specifies the first string to compare.
string2	Required. Specifies the second string to be compared.

Technical details

##PHP version: More Multiple instances

Return value:	This function returns: 0 - if the two strings are equal ##<0 - if string1 is less than string2 >0 - if string1 Greater than string2
4+

Instance 1

Compare two strings (not case sensitive, HELLO and hELLo output the same):

<?php
echo strcasecmp("Hello","HELLO");
echo "<br>";
echo strcasecmp("Hello","hELLo");
?>

Instance 2

Different Return value:

<?php
echo strcasecmp("Hello world!","HELLO WORLD!"); // The two strings are equal
echo strcasecmp("Hello world!","HELLO"); // String1 is greater than string2
echo strcasecmp("Hello world!","HELLO WORLD! HELLO!"); // String1 is less than string2 
?>

strcasecmp — Binary safe comparison of strings (case-insensitive)

int strcasecmp ( string $str1 , string $str2 )

Return value:

//如果 str1 小于 str2，返回负数；如果 str1 大于 str2，返回正数；二者相等则返回 0。

Simple example:

<?php
$var1 = "Hello";
$var2 = "hello";
if (strcasecmp($var1, $var2) == 0) {
    echo &#39;$var1 is equal to $var2 in a case-insensitive string comparison&#39;;
}
?>

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