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PHP : Function Reference : String Functions : strcasecmp

strcasecmp

Binary safe case-insensitive string comparison (PHP 4, PHP 5)
int strcasecmp ( string str1, string str2 )

Binary safe case-insensitive string comparison.

Parameters

str1

The first string

str2

The second string

Return Values

Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.

Examples

Example2451.strcasecmp() example

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


Related Examples ( Source code ) » strcasecmp


Code Examples / Notes » strcasecmp

27-aug-2002 02:53

The sample above is only true on some platforms that only use a simple 'C' locale, where individual bytes are considered as complete characters that are converted to lowercase before being differentiated.
Other locales (see LC_COLLATE and LC_ALL) use the difference of collation order of characters, where characters may be groups of bytes taken from the input strings, or simply return -1, 0, or 1 as the collation order is not simply defined by comparing individual characters but by more complex rules.
Don't base your code on a specific non null value returned by strcmp() or strcasecmp(): it is not portable. Just consider the sign of the result and be sure to use the correct locale!


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