win_is_writable( string $path ): bool

Workaround for Windows bug in is_writable() function


Description

PHP has issues with Windows ACL’s for determine if a directory is writable or not, this works around them by checking the ability to open files rather than relying upon PHP to interprate the OS ACL.

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See also


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Parameters

$path string Required
Windows path to check for write-ability.

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Return

bool Whether the path is writable.


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Source

File: wp-includes/functions.php. View all references

function win_is_writable( $path ) {
	if ( '/' === $path[ strlen( $path ) - 1 ] ) {
		// If it looks like a directory, check a random file within the directory.
		return win_is_writable( $path . uniqid( mt_rand() ) . '.tmp' );
	} elseif ( is_dir( $path ) ) {
		// If it's a directory (and not a file), check a random file within the directory.
		return win_is_writable( $path . '/' . uniqid( mt_rand() ) . '.tmp' );
	}

	// Check tmp file for read/write capabilities.
	$should_delete_tmp_file = ! file_exists( $path );

	$f = @fopen( $path, 'a' );
	if ( false === $f ) {
		return false;
	}
	fclose( $f );

	if ( $should_delete_tmp_file ) {
		unlink( $path );
	}

	return true;
}


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Changelog

Changelog
Version Description
2.8.0 Introduced.

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