Php：关联数组的问题

如果我有一个包含数百个随机ID（也有值）的数组，比如

如何通过循环获得如下输出

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

我可以通过它们的ID引用这些值，如

  echo $myArray['3'];

但是如果你事先不知道下一个ID是什么呢？我的意思是，如何通过循环自动引用ID？甚至可以用php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]

需要帮助请……

为什么不：

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

---

？

非常感谢pix0r的帮助

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

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

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