Using PHP glob() Function to Match File Paths

In PHP, the glob() function retrieves file paths that match a specified pattern, providing a convenient way to filter files based on wildcards.

The function signature is array glob ( string $pattern [, int $flags = 0 ] ) , where $pattern supports *, ?, and [] wildcards, and $flags can modify matching behavior.

Examples:

$files = glob('path/to/directory/*');

This returns an array of all files in the given directory.

$files = glob('path/to/directory/*.txt');

Returns only files with the .txt extension.

$files = glob('path/to/directory/*.{jpg,png}', GLOB_BRACE);

Using GLOB_BRACE enables brace expansion to match .jpg or .png files.

$files = glob('path/to/directory/**/*', GLOB_BRACE);

With the ** wildcard, the function recursively matches files in sub‑directories.

The function may also support case‑sensitive matching and custom filters; it returns both files and directories and yields an empty array when no matches are found, so callers should handle these cases appropriately.

In summary, glob() is a flexible and powerful tool for file selection in PHP, but developers should be aware of case sensitivity, directory depth, and the need for appropriate flags or filters to achieve precise results.

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