Question

我能够创建一个textarea框，它将接受文本并将该文本存储到$ _POST超级全局，但是一旦我提交，我就无法将文本“返回”到框中。（表格是自我提交）。但是，如果我对提交的数据运行简单的回显，它就会显示正常（如下面脚本末尾所示。

 $http.get('iata.php').then(function(response){
        $scope.originLatLong = response.data;
console.log($scope.originLatLong);
    });

使用“<!DOCTYPE html> <body> <?php require("Connection_to_WS.php"); echo ("<form action='Edit_Thread_Description.php' method='post'>"); IF (ISSET($_POST['revised_thread_descr'])) { $revised_thread_descr=($_POST['revised_thread_descr']); ECHO "Edit the Revised_Thread_Description here: <br> <textarea name='revised_thread_descr' rows='5' cols='50' value= $_POST[revised_thread_descr]"; // Fails to return any text on Submit. ?><p></textarea></p><br><?php } ELSE {$revised_thread_descr= '[some default]'; ECHO "Edit the Revised_Thread_Description here: <br> <textarea name= 'revised_thread_descr' rows='5' cols='50' value= $revised_thread_descr"; ?><p></textarea></p><br><?php } ECHO '<br>'; echo $_POST['revised_thread_descr']; // Succeeds in returning POST text from the textarea box upon Submit (but outside of the textarea box). ECHO '<br>'; echo "Click 'Submit': <input type='Submit' name='submit' value='Submit'/>"; echo '<br>'; mysqli_close($connection); ?> </body> </html>”轻松做同样的事情，但是我已经陷入了让<input type合作的时间。我对任何帮助表示感谢。

Answer 1

正如Ann Sophie所说，textarea元素没有“价值”属性（https://www.w3schools.com/tags/tag_textarea.asp）

如果您想动态地向其添加内容，可以使用：

<?php if (isset($_POST['revised_thread_descr'])): ?>
 <textarea><?= $_POST['revised_thread_descr'] ?></textarea>
<?php else: ?>
  //

请注意，你必须回应它，在我的例子中我使用了替代语法，（http://php.net/manual/fr/control-structures.alternative-syntax.php）我认为使用PHP + HTML

时会更清晰

<?= XXX ?>是<?php echo XXX; ?>

的缩写

Answer 2

我通过上面的“评论”拙劣地回复了一下。这继续发表评论：

此代码有效，但不会重新填充带有通过POST超级全局提交回脚本的备注的框。

IF(ISSET($_POST['revised_thread_descr'])):
$revised_thread_descr=($_POST['revised_thread_descr']); ?>
<p> Revised_thread_descr - Edit here:</p><textarea   
name='revised_thread_descr' rows='5' cols='50' 
<p></textarea></p><br>
<?php 

ELSE:
    $revised_thread_descr= '[some default]'; ?>
<p> Revised_thread_descr - Edit here:</p><textarea name=      'revised_thread_descr' rows='5' cols='50' 
<p></textarea></p><br>
<?php
    ENDIF;

echo "Click 'Submit': <input type='Submit' name='submit' value='Submit'/>";
echo '<br>';
mysqli_close($connection); 
?>
</body>
</html>

此代码只有略微不同的<p>标记位置，吞噬并显示结束</textarea>标记后的所有html素材。

IF(ISSET($_POST['revised_thread_descr'])):
$revised_thread_descr=($_POST['revised_thread_descr']); ?>
<p> Revised_thread_descr - EDIT HERE:</p><p><textarea name=     'revised_thread_descr' rows='5' cols='50' 
</textarea></p><br>
<?php

如下面的浏览器渲染截图所示。

谢谢，顺便说一句，让我尝试替代语法！不那么容易混淆。

Answer 3

保佑你！我放弃了，并且正在寻找解决方法。我按照你的建议放入了标签插头，这一切都奏效了。这是它的要点，一切正常，textarea框正确填充。非常感谢你的耐心和坚持。告诉我它变得更容易......。

<!DOCTYPE html> <body> 
<?php
echo ("<form action='Textarea_Example.php' method='post'>");

// The first IF only executes after the script has run once and created a POST value.  On the second run, the first IF executes and successfully populates the textarea box with the latest POSTed value 
IF (ISSET($_POST['revised_thread_descr'])): ?>
<p>Edit current thread description:<p>
<textarea name= 'revised_thread_descr' rows='5' cols='50'> 
<?php echo $_POST['revised_thread_descr'] ?>
</textarea> 

<?php ELSE: 
$revised_thread_descr = 'some default'; ?>
<p>Edit current thread description:<p>
<p><textarea name= 'revised_thread_descr' rows='5' cols='50'> 
The textarea box opens with this in it, but only on the first run.  Then it successfully switches to the value typed to the textarea box and saved to POST
</textarea> 
<?php ENDIF; ?>
</p>
<?php
// here's the submit button
echo "Click 'Submit': <input type='Submit' name='submit' value='Submit'/>";
?>
</body> </html>

我可以自己提交回textarea盒子吗？

3 个答案: