Superglobals
Though you can use var_dump to output the value of $GLOBALS.
$GLOBALS
(No version information available, might be only in CVS)
$GLOBALS — References all variables available in global scope
Descrizione
An associative array containing references to all variables which are currently defined in the global scope of the script. The variable names are the keys of the array.
Esempi
Example #1 $GLOBALS example
<?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();
?>
Il precedente esempio visualizzerà qualcosa simile a:
$foo in global scope: Example content $foo in current scope: local variable
Note
Nota: This is a 'superglobal', or automatic global, variable. This simply means that it is available in all scopes throughout a script. There is no need to do global $variable; to access it within functions or methods.
Nota: Variable availability Unlike all of the other superglobals, $GLOBALS has essentially always been available in PHP.
add a note
User Contributed Notes$GLOBALS
ravenswd at yahoo dot com
12-Aug-2008 01:02
12-Aug-2008 01:02
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?"