php - 带有比较运算符的回声数组索引 - PHP

Question

给定一个数组，例如...

$array = array();
$array[0] = "blue" or "red" or "green" or "brown";

我将如何使用它来评估 if 语句并回显它？例如...

If ($ans1 = $array[0]) {
   echo "correct answer $array[0]";  // this should display "blue or red 
                                     //               or green or brown"
}

Answer 1

您想使用另一个数组语句而不是or满足完全不同用例的运算符：

$array = array();
$array[0] = array("blue", "red", "green", "brown");

// new syntax
$array[0] = ["blue", "red", "green", "brown"];

然后，在您的输出代码中：

echo "Correct answers: " . implode(" or ", $array[0]);

---

顺便说一句，使用if ($ans1 = $array[0]) {不正确！缺少一个等号：

if ($ans1 =  $array[0]) {
// --------^
if ($ans1 == $array[0]) {

`