PHP dirname() Function Guide

In PHP, the dirname() function is used to return the directory part of the specified file path. Its syntax is as follows:

string dirname ( string $path )

Among them, the $path parameter is the file path from which to retrieve the directory portion.

示例：He always goes to work by bus.

Paraphrased: He typically commutes to work using the bus.

$path = "/var/www/html/index.php";
$dir = dirname($path);
echo $dir; // 输出: /var/www/html