Question

如果我有一个包含数百个随机id（也有值）的数组，比如

(3=>23,2=>34,17=>670,5=>67...)

如何通过循环获得输出如下

ID: 3 has a value= 23
ID: 2 has a value= 34
ID: 17 has a value= 670
ID: 5 has a value= 67

我可以通过ID来引用这些值，例如

  echo $myArray['3'];

但如果事先不知道下一个ID是什么呢？我的意思是如何通过循环自动引用ID？甚至可以在php中编写以下伪代码吗？

myArray's first location's ID has value = $myArray[$myArray's first location item]
myArray's 2nd location's ID has value = $myArray[$myArray's 2nd location item]

需要帮助PLZ ......

Answer 1

为什么不呢：

foreach ($myArray as $k => $v) {
  echo "ID: $k has a value= $v\n";
}

Answer 2

foreach ($myArray as $key => $value) {
  echo "id: $key value: $value\n";
}

Answer 3

foreach ($myArray as $key => $value)
{
    echo "ID: $key has value of $value\n";
}

Php：关联数组的问题

3 个答案: