Superglobais
this is technique that i always did for configuration file..
<?php
$conf['conf']['foo'] = 'this is foo';
$conf['conf']['bar'] = 'this is bar';
function foobar() {
global $conf;
var_dump($conf);
}
foobar();
/*
result is..
array
'conf' =>
array
'foo' => string 'this is foo' (length=11)
'bar' => string 'this is bar' (length=11)
*/
?>
$GLOBALS
$GLOBALS — Referencia todas variáveis disponíveis no escopo global
Descrição
Um array associativo contendo referências para todas as variáveis que estão atualmente definidas no escopo global do script. O nome das variáveis são chaves do array.
Exemplos
Exemplo #1 Exemplo da $GLOBALS
<?php
function test() {
$foo = "local variable";
echo '$foo in global scope: ' . $GLOBALS["foo"] . "\n";
echo '$foo in current scope: ' . $foo . "\n";
}
$foo = "Example content";
test();
?>
O exemplo acima irá imprimir algo similar a:
$foo in global scope: Example content $foo in current scope: local variable
Notas
Nota:
Esta é uma 'superglobal', ou global automática, variável. Isto simplismente significa que ela está disponível em todos escopos pelo script. Não há necessidade de fazer global $variable; para acessá-la dentro de uma função ou método.
Nota: Disponibilidade da variável
Diferente de todas as outras superglobais, $GLOBALS tem essencialmente sempre estado disponível no PHP.
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User Contributed Notes
$GLOBALS
Gratcy
13-May-2012 01:03
therandshow at gmail dot com
29-Jun-2011 12:32
As of PHP 5.4 $GLOBALS is now initialized just-in-time. This means there now is an advantage to not use the $GLOBALS variable as you can avoid the overhead of initializing it. How much of an advantage that is I'm not sure, but I've never liked $GLOBALS much anyways.
williams at 3cisd dot com
28-Jul-2009 09:53
Better yet, use print_r. While var_dump does detect the recursion that var_export fails on, it seems to recurse one level first for my setup. So var_dump ends up printing all globals twice, but print_r prints them only once since it detects the recursion right away. Serialize seems to not detect the recursion at all either, similar to var_export.
David
13-Aug-2008 11:47
Though you can use var_dump to output the value of $GLOBALS.
ravenswd at yahoo dot com
12-Aug-2008 07:02
Keep in mind that $GLOBALS is, itself, a global variable. So code like this won't work:
<?php
print '$GLOBALS = ' . var_export($GLOBALS, true) . "\n";
?>
This results in the error message: "Nesting level too deep - recursive dependency?"