if else 函数问题？
我在 while 循环中有以下带有 if...else 语句的代码。
$colour = array("50305A", "E33600", "DBDD02", "73BE58");
$nextcolr = next($colour);
if ($nextcolr == FALSE)
{
reset($colour);
echo current($colour);
}
else
{
echo next($colour);
}
我无法弄清楚为什么 else 语句中的内容没有被执行，即使我切换这两个语句并反转运算符。有人可以帮助我吗？
整个 while 循环：
while($row = mysql_fetch_array($result))
{
echo "by <a href='/neuro/profile.php?userid=$row[MemberID]'>" . $row['FirstName'] . " " . $row['LastName'] . "</a> on " . $row['Timestamp'] . " | " . $row['NumberOfComments'] . " comments.";
echo "<div id='blog' style='background-color:#";
if ($nextcolr == FALSE)
{
reset($colour);
echo current($colour);
}
else
{
echo next($colour);
}
echo "'><a href='blog.php?threadid=" . $row['tID'] . "'>" . $row['Title'] . "</a></div>";
}
I have the following code with the if...else statement within a while loop.
$colour = array("50305A", "E33600", "DBDD02", "73BE58");
$nextcolr = next($colour);
if ($nextcolr == FALSE)
{
reset($colour);
echo current($colour);
}
else
{
echo next($colour);
}
I can't work out why what ever is in the else statement isn't being executed, even if I switch the two statements and reverse the operator. Could anyone help me?
The entire while loop:
while($row = mysql_fetch_array($result))
{
echo "by <a href='/neuro/profile.php?userid=$row[MemberID]'>" . $row['FirstName'] . " " . $row['LastName'] . "</a> on " . $row['Timestamp'] . " | " . $row['NumberOfComments'] . " comments.";
echo "<div id='blog' style='background-color:#";
if ($nextcolr == FALSE)
{
reset($colour);
echo current($colour);
}
else
{
echo next($colour);
}
echo "'><a href='blog.php?threadid=" . $row['tID'] . "'>" . $row['Title'] . "</a></div>";
}
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评论（4）
这就是你的 while 循环应该是什么样子的。如果我是对的，您还在 while 循环中定义 $color，这可能会导致问题。
is how your while loop should look like. If I am right, you are also defining $colour in the while loop, which might cause problems.
如果所有这些都在 while 循环中，那么您将在每次迭代时重新声明数组，从而将数组内部指针返回到每次迭代的开头。
If all this is in the while loop, then you are re-declaring the array on each iteration, thus returning the array internal pointer to the beginning with each iteration.
如果你想多次迭代这个数组，你可以这样做：
所以你不需要这个 if-else 块。
If you want to iterate this array multiple times, you could do it this way:
So you don't need this if-else block.
原始 while 循环的问题是您从未更改 $nextcolr 的值。
因此，它始终保持 FALSE 并且 else 部分永远不会被执行。
The problem with your original while loop is that you never change the value of $nextcolr.
Thus, it always remains FALSE and the else part never gets executed.