如何将 PHP 字符串传递到 Javascript 函数调用中？
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How do I pass a PHP string into a Javascript function call?
提问by Brecon
Possible Duplicate:
Pass a PHP string to a Javascript variable (and escape newlines)
So, essentially I am trying to pass a string from a PHP page as an argument for a javascript function. The PHP is included in the page that the script is on, but they are in two separate files.
所以，本质上我试图从 PHP 页面传递一个字符串作为 javascript 函数的参数。PHP 包含在脚本所在的页面中，但它们位于两个单独的文件中。
However, whenever I try to pass a string, it stops the javascript from running. I can pass PHP integers, but not strings. Is it possible to fix this? I've been looking around the internet for what might be causing my error, but I can't find anything. Any help would be greatly appreciated.
但是，每当我尝试传递字符串时，它都会停止运行 javascript。我可以传递 PHP 整数，但不能传递字符串。有没有可能解决这个问题？我一直在互联网上寻找可能导致我出错的原因，但我找不到任何东西。任何帮助将不胜感激。
This is the PHP and HTML. The function runs when submit is clicked.
这是 PHP 和 HTML。该函数在单击提交时运行。
$comment = "7b";
echo"
<table>
<p><input type='text' id='newPostComment' value='' placeholder='WRITE YOUR COMMENT HERE...' size='35'/><input type='submit' value='UPLOAD' onclick='uploadPostComment($parentID, $comment);fetchComment()'/></p>
</table>
This is the javascript function.
这是javascript函数。
function uploadPostComment(PostCID, Comment){
var PostCommentData = "fsPostID="+PostCID;
PostCommentData += "&fsPostComment="+Comment;
var xmlHttp = new XMLHttpRequest();
xmlHttp.open("post", "uploadPostComment.php", true);
xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlHttp.setRequestHeader("Content-length", PostCommentData.length);
xmlHttp.setRequestHeader("Connection", "close");
xmlHttp.onreadystatechange = function()
{
if(xmlHttp.readyState == 4)
{
if(xmlHttp.status == 200)
{
alert("Message Posted");
}
else
{
alert("Oh no, an error occured2");
}
}
};
xmlHttp.send(PostCommentData);}
回答by cryptic ツ
echo"
<table>
<p><input type='text' id='newPostComment' value='' placeholder='WRITE YOUR COMMENT HERE...' size='35'/><input type='submit' value='UPLOAD' onclick='uploadPostComment(\"$parentID\", \"" . str_replace('"', '\"', $comment) . "\");fetchComment()'/></p>
</table>
You need to quote the fields. If your field is an integer it does not need to be quoted, if it is a string it needs to be. I quoted both because I don't know if parentID is a string id or a numeric id. Do what your application needs of course.
您需要引用字段。如果您的字段是整数，则不需要引用，如果是字符串，则需要引用。我引用了两者，因为我不知道 parentID 是字符串 id 还是数字 id。做你的应用程序当然需要什么。
Update: in regards to Michael's comment about breaking if comment contains a quote. We now escape all double quotes in $comment to prevent that.
更新：关于迈克尔关于打破如果评论包含引用的评论。我们现在转义 $comment 中的所有双引号以防止这种情况发生。
回答by Eugen Rieck
<input type='submit' value='UPLOAD' onclick='uploadPostComment($parentID, $comment);fetchComment()'/>
is your culprit, especially uploadPostComment($parentID, $comment);- if $comment is a string, you need to put quotes in place: uploadPostComment($parentID, \"$comment\");
是你的罪魁祸首，尤其是uploadPostComment($parentID, $comment);- 如果 $comment 是一个字符串，你需要把引号放在适当的位置：uploadPostComment($parentID, \"$comment\");
回答by Viral Patel
Wrap the string in escaped double quotes like \"$comment\"
将字符串包裹在转义的双引号中，例如 \"$comment\"
$comment = "7b";
echo"
<table>
<p><input type='text' id='newPostComment' value='' placeholder='WRITE YOUR COMMENT HERE...' size='35'/><input type='submit' value='UPLOAD' onclick='uploadPostComment(\"$parentID\", \"$comment\");fetchComment()'/></p>
</table>
