PHP returns file path information

In PHP development, obtaining file path information is a common requirement. Whether you are reading a file or operating a file, processing the file path is essential. This article will introduce how to return file path information in PHP, including file name, path, extension, etc. By studying this article, readers will be able to skillfully handle various file path information and improve PHP development efficiency. PHP editor Banana will give you a detailed explanation so that you can easily master the processing skills of file path information.

php Get file path information

In PHP, you can obtain detailed information of the specified file path through the pathinfo() function. This function returns an array containing information about each part of the file path.

grammar

pathinfo(string $path, int $options = PATHINFO_DIRNAME | PATHINFO_BASENAME | PATHINFO_EXTENSION | PATHINFO_FILENAME)

parameter

• $path: The complete file path to obtain the information.
• $options (optional): Optional bitmask flag used to specify which path information to return.

Constant options

The following constants are available for $options Parameters:

• PATHINFO_DIRNAME: The directory part of the file path.
• PATHINFO_BASENAME: The complete file name of the file path (including extension).
• PATHINFO_EXTENSION: The file extension of the file path (without the dot).
• PATHINFO_FILENAME: The file name of the file path (excluding extension).

return value

pathinfo() The function returns an associative array in which the key name corresponds to the specified path information option and the key value corresponds to the corresponding part of the file path. For example:

$path = "/var/www/html/file.php";

$pathinfo = pathinfo($path);

print_r($pathinfo);

Output result:

Array
(
[dirname] => /var/www/html
[basename] => file.php
[extension] => php
[filename] => file
)

Handling different situations

pathinfo() The function can handle various file paths, including:

• Absolute path: The complete path from the root directory to the file, such as /var/www/html/file.php.
• Relative path: The path from the current working directory to the file, such as ./file.php.
• URL: UnifORM Resource Locator (Uniform Resource Locator), such as <strong class="keylink">Http</strong>://example.com/file.php.
• Windows paths: Use backslashes as path separators, for example C:UsersJohnDocumentsfile.php.

extensions

In addition to using the pathinfo() function, you can also use other PHP functions to obtain file path information:

• realpath(): Get the real path (absolute path) of the file or directory.
• dirname(): Get the directory part of the file path.
• basename(): Get the file name (including extension) of the file path.
• file_exists(): Check whether the specified file or directory exists.
• is_file(): Check whether the specified file exists.
• is_dir(): Check whether the specified directory exists.

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