Definition
arg($index = NULL, $path = NULL)
drupal/includes/path.inc, line 159
Description
Return a component of the current Drupal path.
When viewing a page at the path "admin/build/types", for example, arg(0) would return "admin", arg(1) would return "content", and arg(2) would return "types".
Avoid use of this function where possible, as resulting code is hard to read. Instead, attempt to use named arguments in menu callback functions. See the explanation in menu.inc for how to construct callbacks that take arguments.
Parameters
$index The index of the component, where each component is separated by a '/' (forward-slash), and where the first component has an index of 0 (zero).
Return value
The component specified by $index, or NULL if the specified component was not found.
Code
function arg($index = NULL, $path = NULL) {
static $arguments;
if (!isset($path)) {
$path = $_GET['q'];
}
if (!isset($arguments[$path])) {
$arguments[$path] = explode('/', $path);
}
if (!isset($index)) {
return $arguments[$path];
}
if (isset($arguments[$path][$index])) {
return $arguments[$path][$index];
}
}