php 警告：explode() 期望参数 2 是字符串，给定数组
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Warning: explode() expects parameter 2 to be string, array given
提问by user1938508
Im trying to use a script. And when I go to use it I get the following error:
我正在尝试使用脚本。当我去使用它时，我收到以下错误：
Warning: explode() expects parameter 2 to be string, array given in /myred/include/functions.php on line 16
Warning: in_array() expects parameter 2 to be array, null given in /myred/include/functions.php on line 17
警告：explode() 期望参数 2 是字符串，数组在第 16 行的 /myred/include/functions.php 中给出
警告：in_array() 期望参数 2 是数组，在第 17 行的 /myred/include/functions.php 中给出空值
Now, Below is line 16 and 17 of the functions.php. Anyone have any idea what is wrong with it?
现在，下面是functions.php 的第16 和17 行。任何人都知道它有什么问题吗？
$reserved = explode("--",$reserved);
if (in_array("$dname", $reserved)) {
$errormsg .= "$text_17<br>";
}
return $errormsg;
For reference, this is the script I am using: http://www.milliscripts.at/downloads/myred_14_mysql_5.zip
作为参考，这是我使用的脚本：http: //www.milliscripts.at/downloads/myred_14_mysql_5.zip
THANKS!
谢谢！
回答by rcorrie
It's simple, on line 16, your trying to explode an array, look at the php manual for explode, it splits a string by any delimiter you specify.
很简单，在第 16 行，您尝试explode分解一个数组，查看 php 手册 for ，它会按您指定的任何分隔符拆分字符串。
Since $reservedon line 16 is failing, line 17 fails too because $reservedis not being set properly.
由于$reserved第 16 行失败，第 17 行也失败，因为$reserved没有正确设置。
Post more code, we need to see where $reservedis first being declared.
发布更多代码，我们需要查看$reserved首先声明的位置。
回答by leepowers
This line is the cause of your woes:
这条线是你的困境的原因：
$reserved = explode("--",$reserved);
From the error message it appears the $reservedis already an array. I'm going to guess at it and say that each element of the initial $reservedarray are strings that contain "--"that you want to split on.
从错误消息看来，$reserved它已经是一个数组。我将猜测它并说初始$reserved数组的每个元素都是包含"--"要拆分的字符串。
If this assumption is right you'll need to convert $reservedto a string using implode():
如果这个假设是正确的，你需要$reserved使用implode()以下方法转换为字符串：
$reserved = explode("--", implode($reserved));
Which will solve the error and potentially give you the results you're looking for.
这将解决错误并可能为您提供您正在寻找的结果。
