What does the __file__ attribute in php mysql refer to?

In PHP MySQL, the __file__ attribute represents the path of the current PHP file. Using this property allows for better management of file resources, as it enables more precise control over file paths and is suitable for writing PHP scripts.

In PHP, the __file__ attribute is usually used as a way to locate file paths in programs. In some cases, we need to get the absolute path of the current PHP file. In this case, we can use file to get the path of the current file.

Using the file attribute to get the path of the current script is very simple, just use __file__ in the PHP file. For example:

$current_dir = dirname(__FILE__);

In the above code, the dirname() function is used to get the directory name of file, so that we can get the directory where the current PHP file is located . This makes it very convenient to reference other files in the same directory.

In addition to file__, there are other similar properties and functions that can get the path of the current script, such as $_SERVER['SCRIPT_FILENAME'] and realpath() Function, etc., but __file is the simplest and safest way.

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