在HTML textarea中打印PHP变量
[英]Printing a PHP variable in HTML textarea
问题描述
I have a PHP snippet which generates the required output in a variable $ans1 . 
我有一个PHP代码段，它在变量$ans1生成所需的输出。 What I want to do is print this variable $ans1 in a <textarea> . 我想做的是在<textarea>打印此变量$ans1 。 I tried to write the following code but it generates the output as usual and not in the textbox. 我试图编写以下代码，但是它照常生成输出，而不是在文本框中。 The following is my PHP code: 以下是我的PHP代码：
while($row = mysqli_fetch_array($result)) {
if($submit3 == "Positive") {
$ans1 = $row['reply_yes'];
echo $ans1;
} else if($submit3 == "Negative") {
$ans1 = $row['reply_no'];
echo $ans1;
}
echo "<br/>";
break;
}
And following is my HTML code: 以下是我的HTML代码：
<form method="post" action="fetch_page.php">
<input type="submit" name="submit1" value="Positive" onclick="enter()"/>
<input type="submit" name="submit2" value="Negative" onclick="enter()"/>
<textarea name="txt1" cols="66" rows="10" id="txt1"> </textarea>
<script>
function enter()
{
document.getElementById('txt1').value= <?php echo htmlspecialchars($ans1);?>;
}
</script>
</form>
Please tell me where am I going wrong. 请告诉我我要去哪里错了。
Adding quotes like this isnt working either 像这样添加引号也不起作用
document.getElementById('txt1').value= "<?php echo htmlspecialchars($ans1);?>";
As you can see in the following image, the answer(the not bold part) should get printed in the textbox also according to my html code 如下图所示，答案（非粗体部分）也应根据我的html代码打印在文本框中
4 个解决方案
解决方案1
2 2014-04-13 05:52:44
You need to add quotes around the echoed value: 您需要在回显值周围添加quotes ：
document.getElementById('txt1').value = "<?php echo htmlspecialchars($ans1);?>";
And your script should be situated in <head> 并且您的脚本应位于<head>
Edit 编辑
What about using this: 怎么使用这个：
document.getElementById('txt1').value = "<?php Print($ans1); ?>";
解决方案2
2 已采纳 2014-04-13 16:40:45
You can add the text you want to be displayed in the textarea between the <textarea> tag. 您可以在<textarea>标签之间的<textarea>添加要显示的文本。
<textarea name="txt1" cols="66" rows="10" id="txt1">
<?php echo $ans1; ?>
</textarea>
If the text still doesn't appear or you get an error then make sure you access variables from the global scope. 如果文本仍然没有出现或出现错误，请确保您从全局范围访问变量。 Like below. 像下面。
<textarea name="txt1" cols="66" rows="10" id="txt1">
<?php echo $GLOBALS['ans1']; ?>
</textarea>
解决方案3
1 2014-04-13 05:55:08
You didn't surround the php with quotes. 您没有用引号将php引起来。 The following works: 以下作品：
<form method="post" action="fetch_page.php">
<input type="submit" name="submit1" value="Positive" onclick="enter()"/>
<input type="submit" name="submit2" value="Negative" onclick="enter()"/>
<textarea name="txt1" cols="66" rows="10" id="txt1"> </textarea>
<script>
function enter()
{
document.getElementById('txt1').value = "<?php echo htmlspecialchars($ans1); ?>";
}
</script>
</form>
解决方案4
0 2014-04-13 18:39:24
Your question is not a PHP problem. 您的问题不是PHP问题。 You can't see any output from the function because your script is halted upon submission! 您看不到函数的任何输出，因为您的脚本在提交后就暂停了！ So change the submit buttons to type="button" and add a ID, then use the script below. 因此，将提交按钮更改为type="button"并添加一个ID，然后使用以下脚本。 Using jQuery (to minimize t he code you need to write) and use a timeout to actually have time for the function be able to display the results. 使用jQuery（以最大程度地减少需要编写的代码），并使用超时来实际让函数有时间显示结果。
$(".button").click(function() {
var buttonName = $(this).attr('name'),
elm = $(this);
$('#txt1').val( buttonName + ' was clicked.' ); // Add response
setTimeout(function(){
elm.get(0).form.submit(); // Submit form
}, 5000); // After 5 seconds
});
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