how to call global functions classes from namespace PHP

Question

Is there any way how to avoid to using so often backslash ?

Now if i'm using namespace and calling something global inside it i have to use backslash:

namespace foo;
$a = new \my\name(); // instantiates "my\name" class
echo \strlen('hi'); // calls function "strlen"
$a = \INI_ALL; // $a is set to the value of constant "INI_ALL"

in that case code inside namespace become really ugly, is there any way how to avoid that situation ???

The example was taken from that url: http://www.php.net/manual/en/language.namespaces.faq.php

But my problem in that, if I need call some built in class from namespace i have to use backslash in front of the name, can I somehow avoid it ?

You do not need to prefix every built-in function of PHP.

fdomig
– fdomig

2012-08-28 10:22:45 +00:00
Commented Aug 28, 2012 at 10:22 — fdomig
– fdomig, Commented Aug 28, 2012 at 10:22
namespace documentation is really bad

xkeshav
– xkeshav

2012-08-28 10:23:41 +00:00
Commented Aug 28, 2012 at 10:23 — xkeshav
– xkeshav, Commented Aug 28, 2012 at 10:23

Gordon · Accepted Answer · 2012-08-28 10:23:14Z

9

constants and functions from the global namespace do not have to be prepended with a backslash. PHP will fallback to the global namespace for those on it's own. There is a whole chapter in the PHP manual explaining this:

Using namespaces: fallback to global function/constant

Inside a namespace, when PHP encounters a unqualified Name in a class name, function or constant context, it resolves these with different priorities. Class names always resolve to the current namespace name. […] For functions and constants, PHP will fall back to global functions or constants if a namespaced function or constant does not exist.

answered Aug 28, 2012 at 10:23

Gordon

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10 Comments

user1016265 Over a year ago

Yep, and what should I do with exceptions, for instance, or any other buil in classes ? like memcached etc... ? it does not work if I call it without backslash even php builded extension class. It means in code there are a lot of back slashes :(

Gordon Over a year ago

@user1016265 an exception is neither a function, nor a constant but a class and the manual clearly states that class names resolve to the current namespace name so you have to prepend them or alias them on top of your script.

Michael Over a year ago

You do however need to add the backslash infront of "native" class like \Exception, \Memcached or you can choose to add: use \Exception; to the top of your file. Then you can use new Exception('..'); without the backslash.

user1016265 Over a year ago

@Gordon that PHP manual fully crap. What solution do you think better, what Michael suggested or manual described ? My opinion Michael suggestion better in 100%

Gordon Over a year ago

@user1016265 what Michael describes is the same that I describe is the same that the Manual describes. We all describe the same thing because we bothered to read and understand the manual.

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