ID: 35215 User updated by: timo dot hummel at 4fb dot de Reported By: timo dot hummel at 4fb dot de Status: Bogus Bug Type: Strings related Operating System: any PHP Version: 5.0.5 New Comment:
I know it is not a bug, it's rather a design issue. However, I suggest to implement something to get the technical value of a float variable. This design issue renders either floating-point values or locale settings useless. Something like http://www.php.net/strval which ignores the locale settings would be more useful: $float = 0.12; $sql = "SELECT * FROM test WHERE value=".strval($float, IGNORE_LOCALE); It would be nice if something like that would be included in a later version of the zend engine or in PHP itself. Previous Comments: ------------------------------------------------------------------------ [2005-11-14 16:47:03] [EMAIL PROTECTED] Not a bug. I don't like that behaviour either, anyway there's number_format() and *printf(). ------------------------------------------------------------------------ [2005-11-14 15:51:28] timo dot hummel at 4fb dot de Description: ------------ Currently, the whole way PHP does type juggling is affected using setlocale. Right now, PHP respects the setlocale-Settings for LC_NUMERIC when doing type-juggling (e.g. converting a float to a string or when outputting data): $float = 0.12; setlocale(LC_ALL, "de_DE"); echo $float; The simple example above outputs 0,12. If you need to build up SQL queries, this behaviour is unwanted and causes errors: $float = 0.12; setlocale(LC_ALL, "de_DE"); $sql = "SELECT * FROM test WHERE value=$float;"; The query will be "juggled" to SELECT * FROM test WHERE value=0,12; - which is not the expected result. If setlocale is used, there's no way (at least not to my knowledge) to access the original, english (I also call it technical) representation of a floating point number. This is not really a bug, but rather a limitation by design, but it effectively prevents PHP developers from implementing multi-lingual applications. Reproduce code: --------------- <?php /* Nicer output for browsers */ echo "<pre>"; /* Predefine some variables to play around with */ $float = 0.12; $sql = "SELECT * FROM test WHERE amount="; setlocale(LC_ALL, "C"); // Set standard locale echo strval($float). "\n"; // Outputs 0.12, which is OK echo $sql . $float."\n"; // Outputs SELECT * FROM test WHERE amount=0.12, which can be used by a database. setlocale(LC_ALL, "de_DE"); // Set german locale echo strval($float). "\n"; // Outputs 0,12, which is OK for display purposes, but not for data processing echo $sql . $float."\n"; // Outputs SELECT * FROM test WHERE amount=0,12, which cannot be used by a database with english locale. echo "</pre>"; ?> ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=35215&edit=1
