Superglobals
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.
$GLOBALS
$GLOBALS — References all variables available in global scope
설명
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.
예제
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();
?>
위 예제의 출력 예시:
$foo in global scope: Example content $foo in current scope: local variable
주의
Note: 이는 '자동전역' 변수입니다. 스크립트의 모든 영역에서 사용할 수 있습니다. 함수나 메쏘드 안에서 접근하기 위해서 global $variable;를 할 필요가 없습니다.
Note: Variable availability
Unlike all of the other superglobals, $GLOBALS has essentially always been available in PHP.
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User Contributed Notes$GLOBALS
williams at 3cisd dot com
28-Jul-2009 10:53
28-Jul-2009 10:53
ravenswd at yahoo dot com
12-Aug-2008 08:02
12-Aug-2008 08:02
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?"