<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php.cn</title>
</head>
<body>
<?php
$x=5;
$y=6;
function test(){
global $x,$y;
$y= $x $y;
}
test();
echo $y;
?>
</ body>
</html>
After execution, the result is 6, shouldn’t it be 11? I checked that $x has no value
明日边缘2019-03-01 16:22:59
You only used the value of the global variable in the method, and the value of the global variable did not change.
失去过去2019-02-05 20:24:50
Use the $GLOBAL super global function to print the data and you will know how much the data is
过客2019-02-03 09:53:02
//是可以正常显示11呀，不行你复制本地测试一下看看
$x=5;
$y=6;
function test(){
global $x,$y;
$y=$x+$y; //11= 5 + 6
}
test();
echo $x; //5
echo "<br>";
echo $y; //11