_wp_check_alternate_file_names() │ WP 5.8.1

Helper function to test if each of an array of file names could conflict with existing files.

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Returns

bool. True if the tested file name could match an existing file, false otherwise.

Usage

_wp_check_alternate_file_names( $filenames, $dir, $files );
$filenames(string[]) (required)
Array of file names to check.
$dir(string) (required)
The directory containing the files.
$files(array) (required)
An array of existing files in the directory. May be empty.

Changelog

Since 5.8.1 Introduced.

_wp_check_alternate_file_names() code WP 7.1.2

wp-includes/functions.php 
function _wp_check_alternate_file_names( $filenames, $dir, $files ) {
	foreach ( $filenames as $filename ) {
		if ( file_exists( $dir . $filename ) ) {
			return true;
		}

		if ( ! empty( $files ) && _wp_check_existing_file_names( $filename, $files ) ) {
			return true;
		}
	}

	return false;
}