PHP 几个路径函数

 // dirname()// Returns directory name component of pathbasename()// Returns filename component of pathpathinfo()// Returns information about a file path;// pathinfo() returns an associative array containing information about path .parse_url()// Parse a URL and return its components;// This function parses a URL and returns an associative array // containing any of the various components of the URL that are present.realpath()// Returns canonicalized absolute pathname;// realpath() expands all symbolic links and resolves references to '/./', '/../' and// extra '/' characters in the input path . and return the canonicalized absolute pathname. http_build_query()// Generate URL-encoded query string;// Generates a URL-encoded query string // from the associative (or indexed) array provided. http_build_url()// Build an URL