note 82866 modified in language.variables.variable by danbrown
| From: | danbrown@php.net | Date: | Wed, 24 Jun 2009 16:14:27 +0000 |
| Subject: | note 82866 modified in language.variables.variable by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-157372@lists.php.net to get a copy of this message | ||
You can use eval() to get around the limitation on using variable variables to reference superglobal
arrays. e.g.:
<?php
# this fails:
function indir($name) {
$moe = $$name;
echo "<pre>";
print_r($moe);
echo "</pre>";
}
indir("_SERVER");
# this works :-)
function indir($name) {
$moe = eval("return \$$name;");
echo "<pre>";
print_r($moe);
echo "</pre>";
}
indir("_SERVER");
?>
--was--
You can use eval() to get around the limitation on using variable variables to reference superglobal
arrays. e.g.:
# this fails:
function indir($name) {
$moe = $$name;
echo "<pre>";
print_r($moe);
echo "</pre>";
}
indir("_SERVER");
# this works :-)
function indir($name) {
$moe = eval("return \$$name;");
echo "<pre>";
print_r($moe);
echo "</pre>";
}
indir("_SERVER");
http://php.net/manual/en/language.variables.variable.php