使用post在php中未定义索引，但它可以使用update.php上的请求回显该值
我有这两个文件，我正在更新一个表，但是在update.php文件中，我得到了一个错误提示：未定义的索引：pname，$pcode<代码>$pname=$\u POST[“pname”]这里我将pname值存储在pname变量中。但它显示错误使用post在php中未定义索引，但它可以使用update.php上的请求回显该值,php,mysql,Php,Mysql,我有这两个文件，我正在更新一个表，但是在update.php文件中，我得到了一个错误提示：未定义的索引：pname，$pcode$pname=$\u POST[“pname”]这里我将pname值存储在pname变量中。但它显示错误 <address> <div class="control-group">
<address>
<div class="control-group">
<label class="control-label">Product Name:</label>
<div class="controls">
<input id="pname" name="pname" type="text" value="<?php echo $PName; ?>"
class="input-xlarge">
<p class="help-block"></p>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Code:</label>
<div class="controls">
<input id="code" name="pcode" type="text" value="<?php echo $PCode; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Product Price:</label>
<div class="controls">
<input id="price" name="pprice" type="text" value="<?php echo $PPrice; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Availability:</label>
<div class="controls">
<select id="stock" name="stock" class="input-xlarge">
<option value="1" selected="selected">Available</option>
<option value="0">Not Available</option>
</select>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Description:</label>
<div class="controls">
<textarea rows="4" cols="50" name="description" > <?php echo $PDescription; ?> </textarea>
</div>
</div>
<div class="control-group">
Picture 1 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic1"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 2 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic2"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 3 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic3"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<div class="controls">
<input type='hidden' name='id' value="<?php echo $ID; ?>"><br/>
<input type="submit" value="UPDATE" class="btn-large" />
</div>
</div>
</form>
<address>
<div class="control-group">
<label class="control-label">Product Name:</label>
<div class="controls">
<input id="pname" name="pname" type="text" value="<?php echo $PName; ?>"
class="input-xlarge">
<p class="help-block"></p>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Code:</label>
<div class="controls">
<input id="code" name="pcode" type="text" value="<?php echo $PCode; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Product Price:</label>
<div class="controls">
<input id="price" name="pprice" type="text" value="<?php echo $PPrice; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Availability:</label>
<div class="controls">
<select id="stock" name="stock" class="input-xlarge">
<option value="1" selected="selected">Available</option>
<option value="0">Not Available</option>
</select>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Description:</label>
<div class="controls">
<textarea rows="4" cols="50" name="description" > <?php echo $PDescription; ?> </textarea>
</div>
</div>
<div class="control-group">
Picture 1 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic1"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 2 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic2"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 3 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic3"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<div class="controls">
<input type='hidden' name='id' value="<?php echo $ID; ?>"><br/>
<input type="submit" value="UPDATE" class="btn-large" />
</div>
</div>
</form>
产品名称：
您是否检查表单提交
<address>
<div class="control-group">
<label class="control-label">Product Name:</label>
<div class="controls">
<input id="pname" name="pname" type="text" value="<?php echo $PName; ?>"
class="input-xlarge">
<p class="help-block"></p>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Code:</label>
<div class="controls">
<input id="code" name="pcode" type="text" value="<?php echo $PCode; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Product Price:</label>
<div class="controls">
<input id="price" name="pprice" type="text" value="<?php echo $PPrice; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Availability:</label>
<div class="controls">
<select id="stock" name="stock" class="input-xlarge">
<option value="1" selected="selected">Available</option>
<option value="0">Not Available</option>
</select>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Description:</label>
<div class="controls">
<textarea rows="4" cols="50" name="description" > <?php echo $PDescription; ?> </textarea>
</div>
</div>
<div class="control-group">
Picture 1 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic1"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 2 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic2"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 3 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic3"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<div class="controls">
<input type='hidden' name='id' value="<?php echo $ID; ?>"><br/>
<input type="submit" value="UPDATE" class="btn-large" />
</div>
</div>
</form>
if (isset($_POST["pname"])) {
// do all your form processing here.
}
这将检查$u POST中是否存在pname，然后设置它
<address>
<div class="control-group">
<label class="control-label">Product Name:</label>
<div class="controls">
<input id="pname" name="pname" type="text" value="<?php echo $PName; ?>"
class="input-xlarge">
<p class="help-block"></p>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Code:</label>
<div class="controls">
<input id="code" name="pcode" type="text" value="<?php echo $PCode; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Product Price:</label>
<div class="controls">
<input id="price" name="pprice" type="text" value="<?php echo $PPrice; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Availability:</label>
<div class="controls">
<select id="stock" name="stock" class="input-xlarge">
<option value="1" selected="selected">Available</option>
<option value="0">Not Available</option>
</select>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Description:</label>
<div class="controls">
<textarea rows="4" cols="50" name="description" > <?php echo $PDescription; ?> </textarea>
</div>
</div>
<div class="control-group">
Picture 1 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic1"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 2 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic2"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 3 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic3"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<div class="controls">
<input type='hidden' name='id' value="<?php echo $ID; ?>"><br/>
<input type="submit" value="UPDATE" class="btn-large" />
</div>
</div>
</form>
您收到该错误是因为您没有设置$_POST[“pname”]请正确缩进代码。错误不在您发布的代码中，而是在PHP处理程序中。我们还需要看看里面有什么。我猜你只有在第一次访问页面时才收到这个通知？（意思是：未提交表单。）表单提交后，不应显示该通知。-如果在那之后它仍然显示，我们需要看到更多的代码。另外，请使用下面显示的建议之一。这对我有效$pname=empty（$\u POST['pname']）？“”：$_POST['pname']；
<address>
<div class="control-group">
<label class="control-label">Product Name:</label>
<div class="controls">
<input id="pname" name="pname" type="text" value="<?php echo $PName; ?>"
class="input-xlarge">
<p class="help-block"></p>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Code:</label>
<div class="controls">
<input id="code" name="pcode" type="text" value="<?php echo $PCode; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Product Price:</label>
<div class="controls">
<input id="price" name="pprice" type="text" value="<?php echo $PPrice; ?>"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<label class="control-label">Availability:</label>
<div class="controls">
<select id="stock" name="stock" class="input-xlarge">
<option value="1" selected="selected">Available</option>
<option value="0">Not Available</option>
</select>
</div>
</div>
<div class="control-group">
<label class="control-label">Product Description:</label>
<div class="controls">
<textarea rows="4" cols="50" name="description" > <?php echo $PDescription; ?> </textarea>
</div>
</div>
<div class="control-group">
Picture 1 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic1"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 2 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic2"
class="input-xlarge">
</div>
</div>
<div class="control-group">
Picture 3 :
<div class="controls">
<input type="hidden" name="MAX_FILE_SIZE" value="3000000" />
<input type="file" name="pic3"
class="input-xlarge">
</div>
</div>
<div class="control-group">
<div class="controls">
<input type='hidden' name='id' value="<?php echo $ID; ?>"><br/>
<input type="submit" value="UPDATE" class="btn-large" />
</div>
</div>
</form>