PHP __autoload Cannot redeclare [duplicate]

Question

I started to use the PHP __autoload function and now I'm getting those weird Fatal error: Cannot redeclare class xxx errors.

It's weird since these errors occur on classes I don't even load with the autoload function. And I also use require_once to include the files.

I'm really puzzled about this. Anyone knows anything about this kind of errors when using autoload?

Answer 1

require_once/include_once only looks at the file name when they're trying to include a file, not a class name. So you can have class Foo in both Foo.php and B.php, and then you'll get that error.

I'm not sure how __autoload would cause you any problems, unless __autoload requires Foo.php because it needs class Foo, and you require B.php manually which redefines class Foo.

By the way, use spl_autoload_register instead of __autoload.