<!DOCTYPE html>
<html>
<body>
<?php
/*
$x=5;
function mytest(){
$y=10;
echo "<p>测试函数内部的变量 </p>";
echo "变量 x 是: $x";
echo "<br>";
echo "变量 y 是 :$y";
}
mytest();
echo "<p>测试函数内部的变量</p>";
echo "变量 x 是: $x";
echo "<br>";
echo "变量 y 是 :$y";
*/
/*$x = 5;
$y= 10;
function metest(){
global $x,$y;
$y = $x+$y;
}
metest();
echo $y;*/
/*$x = 5;
$y = 10;
function mytest(){
$GLOBALS['y']= $GLOBALS['x']+$GLOBALS['y'];
//$globals['y']= $globals['x']+$globals['y'];报错不能为小写
}
mytest();
echo $y;*/
function metest(){
static $x = 0;
echo $x;
$x++;
}
metest();
metest();
metest();
?>
</body>
</html>