如何在PHP中将不同的对象串在一起

我想让一个字符串全部连接在一起，这样我就可以只回显一个已定义的组。我想这可能有用

$randomnum = rand(500000,600000);
$refnum = (echo 'ST' . $randomnum . '-' . $coupon_id . '-' . $userid . '');
$refnum;

照办

$refnum = 'ST' . $randomnum . '-' . $coupon_id . '-' . $userid;

照办

$refnum = 'ST' . $randomnum . '-' . $coupon_id . '-' . $userid;

---

你快到了。您不能将

echo

赋值给这样的变量

$randomnum = rand(500000,600000);
$refnum = 'ST' . $randomnum . '-' . $coupon_id . '-' . $userid . '';
echo $refnum;

---

你快到了。您不能将

echo

赋值给这样的变量

$randomnum = rand(500000,600000);
$refnum = 'ST' . $randomnum . '-' . $coupon_id . '-' . $userid . '';
echo $refnum;