案例:PHP案例     状态:不可编辑再运行    进入竖版
 运行结果 
x
 
1
<?php
2
function sum($x,$y) {
3
   $z=$x+$y;
4
   return $z;
5
}
6
7
echo "5 + 10 = " . sum(5,10) . "\n";
8
echo "7 + 13 = " . sum(7,13) . "\n";
9
echo "2 + 4 = " . sum(2,4);
10
?>