Home >Backend Development >PHP Tutorial >How to reference global variables within functions in PHP_PHP Tutorial
How to reference global variables within functions in PHP_PHP Tutorial
- WBOYOriginal
- 2016-07-21 15:48:55882browse
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'
";
?>
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.
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：Cannot modify header information error solution_PHP tutorialNext article：Cannot modify header information error solution_PHP tutorial