How to reference global variables within functions in PHP_PHP Tutorial

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...