_wp_check_existing_file_names( string $filename, array $files )

This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

Helper function to check if a file name could match an existing image sub-size file name.

Parameters

$filename

(string) (Required) The file name to check.

$files

(array) (Required) An array of existing files in the directory.

Return

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

Source

File: wp-includes/functions.php 

function _wp_check_existing_file_names( $filename, $files ) {
	$fname = pathinfo( $filename, PATHINFO_FILENAME );
	$ext   = pathinfo( $filename, PATHINFO_EXTENSION );

	// Edge case, file names like `.ext`.
	if ( empty( $fname ) ) {
		return false;
	}

	if ( $ext ) {
		$ext = ".$ext";
	}

	$regex = '/^' . preg_quote( $fname ) . '-(?:\d+x\d+|scaled|rotated)' . preg_quote( $ext ) . '$/i';

	foreach ( $files as $file ) {
		if ( preg_match( $regex, $file ) ) {
			return true;
		}
	}

	return false;
}

Used By

Used By Description
wp-includes/functions.php: wp_unique_filename()

Get a filename that is sanitized and unique for the given directory.

Changelog

Version Description
5.3.1 Introduced.

© 2003–2021 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/_wp_check_existing_file_names