Included files will default to the global namespace.
<?php
//test.php
namespace test {
include 'test1.inc';
echo '-',__NAMESPACE__,'-<br />';
}
?>
<?php
//test1.inc
echo '-',__NAMESPACE__,'-<br />';
?>
Results of test.php:
--
-test-
Espacio global
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
Sin ninguna definición de espacios de nombres, todas las definiciones de clases y funciones son
colocadas en el espacio global, como si lo estuvieran antes de que PHP soportara los
espacios de nombres. Prefijar un nombre con \ especificará que
el nombre es requerido desde el espacio global incluso en el contexto del
espacio de nombres.
Ejemplo #1 Usar la especificación de espacio global
<?php
namespace A\B\C;
/* Esta función es A\B\C\fopen */
function fopen() {
/* ... */
$f = \fopen(...); // llamar a fopen global
return $f;
}
?>
add a note
User Contributed Notes 6 notes
routinet ¶
13 years ago
PhoneixSegovia at gmail dot com ¶
2 years ago
Note that variables aren't part of the namespace so they are always global (or scoped to function, etc.) and can't be accessed the same way as other namespace stuff.
So no:
namespace Foo;
$var = "hello";
echo \Foo\$var;
nobody at example dot com ¶
9 years ago
In namespaced context the Exception class needs to be prefixed with global prefix operator.
<?php
namespace hey\ho\lets\go;
class MyClass
{
public function failToCatch()
{
try {
$thing = somethingThrowingAnException();
} catch (Exception $ex) {
// Not catched
}
}
public function succeedToCatch()
{
try {
$thing = somethingThrowingAnException();
} catch (\Exception $ex) {
// This is now catched
}
}
}
dmc60 at cam dot ac dot uk ¶
11 months ago
To define an associative array (hash) so that it is part of the namespace, instead of going into the global namespace, just declare it as const, istead of as a variable.
This is handy for lookup tables, config settings, etc.
// Example. Instead of writing:
$my_datatypes = [
"sterility" => [
"xlsx" => [
"Sample Type",
"Run Pass/Fail",
"Result"
],
"db" => [
"SampleType",
"RunPassFail",
"Result"
]
]
];
// ...declare the lookup table like this:
const MY_DATATYPES = [
"sterility" => [
"xlsx" => [
"Sample Type",
"Run Pass/Fail",
"Result"
],
"db" => [
"SampleType",
"RunPassFail",
"Result"
]
]
];
// ...and it will be declared within the current namespace.
hileon at gmail dot com ¶
9 years ago
This design of access globe name is bad, at least inconvenient.
In case that you have some legacy code, and try to copy and re-use it under some namespace. You have to add prefix "\" on any global function call.
xmarcos at gmail dot com ¶
12 years ago
That's the expected behavior, you have to declare the namespace at the top of the file to "extend" it.
If you include a global namespaced file, it will operate on the global namespace.
