How to use the dirname function in PHP to get the directory part of the path

PHP is a programming language widely used in Web development. It provides many built-in functions to facilitate us to deal with various file path issues during development. For example, the dirname function is one of the commonly used path processing functions in PHP. In this article, we will explore how to use the dirname function in PHP to get the directory portion of the path.

The dirname function can return the directory part of the specified path. The syntax of this function is as follows:

dirname($path)

Among them, $path is a string representing the path to be parsed. The dirname function will return the directory part of $path, or "." if there is no directory part.

The following are some specific examples:

echo dirname('/usr/local/bin/php');
// 输出：/usr/local/bin

echo dirname('/usr/local/bin/');
// 输出：/usr/local

echo dirname('/usr/local/');
// 输出：/usr

echo dirname('/usr/');
// 输出：/

echo dirname('.');
// 输出：.

echo dirname('/');
// 输出：/

As you can see, the dirname function can correctly handle various paths.

Of course, the dirname function can also be used to process paths in Windows systems. In Windows systems, the separator in the path is backslash () instead of forward slash (/). Therefore, when using the dirname function, you need to replace the backslash with a forward slash:

echo dirname('C:Program FilesPHPphp.exe');
// 输出：C:/Program Files/PHP

Summary:

The dirname function is a commonly used path processing function and is very practical in PHP development . By using the dirname function, you can easily get the directory portion of the path.

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