我创建了一个简单的PHP表单,每次用户点击“添加”按钮时,都会通过调用javascript函数来附加字段。
表单代码:
<form name="academicForm" method="post" action="send.php">
<script src="addInput.js" language="Javascript" type="text/javascript"></script>
<tr>
<td align="center" valign="middle">
<div id="dynamicInput">
<span id="dynamicInput">Entry #1</span><br />
<input type="text" name="myInputs[]"/>
<select name="formGender[]">
<option value="">Choose one...</option>
<option value="First">first</option>
<option value="Second">second</option>
<option value="Third">third</option>
</select> <br>
<input type="submit" value="Submit">
<input type="button" value="Add fields" onclick="addInput('dynamicInput');"/>
</div>
</td>
</tr>
</table>
</form>
javascript代码:
var counter = 1;
function addInput(divName){
var newdiv = document.createElement('div');
newdiv.innerHTML = "Entry #" + (counter + 1) + "<br><input type='text' name='myInputs[]'> <select name='formGender[]'> <option value=''>Chose one...</option><option value='First'>first</option><option value='Second'>second</option><option value='Third'>third</option></select>";
newdiv.setAttribute('id', divName);
document.getElementById(divName).appendChild(newdiv);
counter++;
}
}
然后,当按下提交按钮时,将指向send.php,其中要解析表单中使用的$ _POST变量:
$myInputs = $_POST["myInputs"];
$formGender = $_POST["formGender"];
foreach ($myInputs as $eachInput) {
$output .= $eachInput . "\n";
}
foreach ($formGender as $eachInput2) {
$output .= $eachInput2 . "\n";
}
然后,无论何时我运行它,只打印第一个表单条目的结果。在Javascript生成的表单字段中插入的所有数据,尽管都是针对相同的变量,但不存在。
有人可以帮我吗?
更新
为了解决重复ID和“添加”位置,Javascript和PHP代码都已更改:
使用Javascript:
newdiv.setAttribute('id', divName+counter);
document.getElementById(divName).appendChild(newdiv);
PHP:
<form name="academicForm" method="post" action="send.php">
<script src="addInput.js" language="Javascript" type="text/javascript"></script>
<tr>
<td align="center" valign="middle">
<div id="dynamicInputForm">
<input type="button" value="Add fields" onclick="addInput('dynamicInput');"/>
<span id="dynamicInput">Entry #1</span><br />
<input type="text" name="myInputs[]"/>
<select name="formGender[]">
<option value="">Choose one...</option>
<option value="First">first</option>
<option value="Second">second</option>
<option value="Third">third</option>
</select> <br>
<input type="submit" value="Submit">
</div>
</td>
</tr>
</table>
</form>
以下是向表单中添加3个新元素的结果,如Chrome Inspector中所示:
<div id="dynamicInputForm">
<input type="button" value="Add" onclick="addInput('dynamicInputForm');">
<br>
<br>
<span id="dynamicInput">Entry #1</span><br>
<input type="text" name="myInputs[]">
<select name="formGender[]">
<option value="">Choose one...</option>
<option value="First">first</option>
<option value="Second">second</option>
<option value="Third">third</option>
</select>
</select> <br>
<div id="dynamicInputForm1"> /*HTML code above*/ </div>
<div id="dynamicInputForm2"> /*HTML code above*/</div>
<div id="dynamicInputForm3">/*HTML code above*/</div>
</div>
<input type="submit" value="Submit">
print_r($ _ POST);
的结果Array ([myInputs] => Array ( [0] => firstEntry ) [formGender] => Array ( [0] => Third )
提前致谢!
答案 0 :(得分:1)
首先,您有两个具有相同ID的元素。 ID必须是唯一的。其次,您将新的输入元素添加到div容器的末尾,而不是在表单内。我相信这是你的问题所在。尝试将它们添加到提交按钮上方。
答案 1 :(得分:0)
在您的代码中,您对多个元素使用相同的ID
var counter = 1;
function addInput(divName){
var newdiv = document.createElement('div');
newdiv.innerHTML = "Entry #" + (counter + 1) + "<br><input type='text' name='myInputs[]'> <select name='formGender[]'> <option value=''>Chose one...</option><option value='First'>first</option><option value='Second'>second</option><option value='Third'>third</option></select>";
/// newdiv.setAttribute('id', divName); //*** Element with id 'dynamicInput' already exist in the dom.
document.getElementById(divName).appendChild(newdiv);
counter++;
}
}