How to use namespaces : fallback to global function in PHP?

[Nathen]

Hi friends,
I have just done the namespaces in PHP. I want to make the namespace to fallback to the global. But I don't know how to do that.!! So thought that someone over there will help me by providing the proper solution. I am in total mess now.!! Please explain me how to use namespaces : fallback to global function? Hope that I am clear with my question. Waiting for the replies.!!

[MELTRONICS]

Since, you have done the Namespaces to some extent, you might know that many times an unresolved warnings are encountered. When PHP encounters a unqualified Name in a class name, function or constant context it gets resolved with the different priorities. A fall back implies more computation which further implies a loss of speed or performance. According to me, you should be mentioned in the document.

[void]

I got what are you trying to say. In simple words you want to access the global classes inside a namespace which can be done very easily. I have provided you with the coding which does the exact thing :

<?php
namespace x\y\z;
class Exception extends \Exception {}

$x = new Exception('hello'); 
$y = new \Exception('hello');

$z = new ArrayObject;
?>

[CodGuru]

If a namespaced function or constant does not exist, then the PHP will fall back to global functions or constants. If you want to make the global functions to fallback inside a namespace, then the following example of coding would help you :

<?php
namespace x\y\z;

const E_ERROR = 45;
function strlen($str)
{
    return \strlen($str) - 1;
}

echo E_ERROR, "\n";
echo INI_ALL, "\n";

echo strlen('hello'), "\n";
if (is_array('hello')) { 
    echo "is array\n";
} else {
    echo "is not array\n";
}
?>