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Bug #1974 Comparison of strings "2.2" and "2.20" returns TRUE
Submitted: 1999-08-05 12:40 UTC Modified: 1999-08-05 14:48 UTC
From: stewart-a at moving-picture dot co dot uk Assigned:
Status: Closed Package: Other
PHP Version: 3.0.11 OS: Linux 2.2.5-15
Private report: No CVE-ID: None
 [1999-08-05 12:40 UTC] stewart-a at moving-picture dot co dot uk
Strings seems to get converted to double for "==" comparison.

<?
$a = (string) 2.2;
$b = (string) 2.20;
if ( "$a" == "$b" ) {
        echo "The string $a equals string $b";
} else {
        echo "The string $a does not equal string $b";
}
?>

Clearly the "strings" 2.2 and 2.20 should not be equivalent.

If this isn't considered a bug then how does one compare two strings like this. I've tried :
if (strval($a) == strval($b) 

but the only successful workaround I've found is:
if ( "$a" == "$b" && strlen($a) == strlen($b) ) {

PHP Modules:
./configure  --with-mysql=/usr/local/mysql --with-apache=/usr/local/src/apache_1.3.6 --enable-track-vars

Configuration

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                                  highlight_keyword
                                                          #007700
                                                                               #007700




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 [1999-08-05 14:48 UTC] rasmus at cvs dot php dot net
strcmp() just like C
 
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