First look at the following code:
Copy the code The code is as follows:
$var1 = "# ####";
$var2 = "&&&&&";
function global_references($use_globals)
{
global $var1, $var2;
if (!$use_globals ) {
$var2 =&$var1; //1
} else {
$GLOBALS["var2"] =&$var1; //2
}
}
global_references(false);
echo "var2 is set to '$var2'
";
global_references(true);
echo "var2 is set to '$var2'
";
?>
The output result is as follows:
var2 is set to '&&&&&'
var2 is set to '# ####'
is visible, in the above code:
$var2 =&$var1; //1
is only visible inside the function.
And
$GLOBALS["var2"] =&$var1; //2
is visible in the global scope.
http://www.bkjia.com/PHPjc/319646.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/319646.htmlTechArticleLook at the following code first: Copy the code as follows: ?php $var1 = "#####"; $var2 = " function global_references($use_globals) { global $var1, $var2; if (!$use_globals) { $var2 = //1...
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