先保存函数,再在函数头写/**+enter就行了
/**
* @param $num1
* @param $num2
* @param $opt
* @return float|int
*/
function calc($num1, $num2, $opt)
{
switch ($opt) {
case '+':
$res = $num1 + $num2;
break;
case '-':
$res = $num1 - $num2;
break;
case '*':
$res = $num1 * $num2;
break;
case '/':
if ($num2 != 0) {
$res = $num1 / $num2;
} else {
exit('除数不能为0');
}
break;
case '%':
$res = $num1 % $num2;
break;
}
return $res;
}
echo "\n";
echo calc(1, 2, '+');
echo "\n";
echo calc(1, 2, '/');
echo "\n";
echo calc(1, 2, '%');
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