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wp_normalize_path( string $path )

Normalize a filesystem path.

Description

On windows systems, replaces backslashes with forward slashes and forces upper-case drive letters. Allows for two leading slashes for Windows network shares, but ensures that all other duplicate slashes are reduced to a single.

Parameters

$path

(string) (Required) Path to normalize.

Return

(string) Normalized path.

Source

File: wp-includes/functions.php

function wp_normalize_path( $path ) {
	$wrapper = '';
	if ( wp_is_stream( $path ) ) {
		list( $wrapper, $path ) = explode( '://', $path, 2 );
		$wrapper               .= '://';
	}

	// Standardise all paths to use /
	$path = str_replace( '\\', '/', $path );

	// Replace multiple slashes down to a singular, allowing for network shares having two slashes.
	$path = preg_replace( '|(?<=.)/+|', '/', $path );

	// Windows paths should uppercase the drive letter
	if ( ':' === substr( $path, 1, 1 ) ) {
		$path = ucfirst( $path );
	}

	return $wrapper . $path;
}

Changelog

Version Description
4.9.7 Allows for PHP file wrappers.
4.5.0 Allows for Windows network shares.
4.4.0 Ensures upper-case drive letters on Windows systems.
3.9.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/wp_normalize_path