wp_is_writable() WP 3.6.0

Determine if a directory is writable.

This function is used to work around certain ACL issues in PHP primarily affecting Windows Servers.

No Hooks.

Return

true/false. Whether the path is writable.

Usage

wp_is_writable( $path );

$path(string) (required)

Path to check for write-ability.

Code of wp is writable: wp-includes/functions.php ^{VER 5.0.3}

<?php
function wp_is_writable( $path ) {
	if ( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) )
		return win_is_writable( $path );
	else
		return @is_writable( $path );
}