function a() {
$a = 3;
$b = 4;
$a = $a + $b;
$b = $a - $b;
$a = $a - $b;
echo $a;
echo $b;
} 芝麻教程
全栈开发工程师，开源爱好者。
function a() {
$a = 3;
$b = 4;
$a = $a + $b;
$b = $a - $b;
$a = $a - $b;
echo $a;
echo $b;
} 全栈开发工程师，开源爱好者。