解决
用户已经在另一台PC上填写了表格，并且已经提供了B.php。用户的PC一定存在问题。 抱歉浪费了人们的时间。 我在Linux共享服务器上使用php和mysql建立了一个基于数据库的站点，我使用CPanel管理它。
我有一个页面A.php，使用表单调用B.php。
最近有两位用户在A.php上提交表单时收到了B.php的404消息。 CPanel错误日志中没有404的证据。
我在谷歌和这里搜索过一个解决方案，但找不到解决方案。
任何有关如何调试此功能的提示都将受到赞赏。
我已经提取了调用B.php的页面的表单组件，因为它很长，所以我没有包含在原始问题中。一个20 X 11单选按钮表。
此表单已经工作了数百次，但对于一个用户来说一直都失败
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Untitled Document</title>
</head>
<body>
<form action="InsertNewRating.php" method="post" name="myForm2 ">
<table id="ratingsInput">
<tr class "toprow" w">
<td align="right">
</td>
<td>
<strong>Low</strong>
</td>
<td>
</td>
<td>
</td>
<td>
</td>
<td>
</td>
<td>
</td>
<td>
</td>
<td>
</td>
<td>
</td>
<td>
High
</td>
<td>
</td>
</tr>
<tr>
<td class "col1" 1" align="left">
<strong>Attribute</strong>
</td>
<td>
1
</td>
<td>
2
</td>
<td>
3
</td>
<td>
4
</td>
<td>
5
</td>
<td>
6
</td>
<td>
7
</td>
<td>
8
</td>
<td>
9
</td>
<td>
10
</td>
<td>
N/A
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A1
</td>
<td class="otherCols">
<input type="radio" name="A0" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A0" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A2
</td>
<td class="otherCols">
<input type="radio" name="A1" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A1" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A3
</td>
<td class="otherCols">
<input type="radio" name="A2" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A2" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A4
</td>
<td class="otherCols">
<input type="radio" name="A3" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A3" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A5
</td>
<td class="otherCols">
<input type="radio" name="A4" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A4" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A6
</td>
<td class="otherCols">
<input type="radio" name="A5" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A5" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A7
</td>
<td class="otherCols">
<input type="radio" name="A6" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A6" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A8
</td>
<td class="otherCols">
<input type="radio" name="A7" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A7" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A9
</td>
<td class="otherCols">
<input type="radio" name="A8" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A8" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A10
</td>
<td class="otherCols">
<input type="radio" name="A9" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A9" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A11
</td>
<td class="otherCols">
<input type="radio" name="A10" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A10" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A12
</td>
<td class="otherCols">
<input type="radio" name="A11" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A11" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A13
</td>
<td class="otherCols">
<input type="radio" name="A12" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A12" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A14
</td>
<td class="otherCols">
<input type="radio" name="A13" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A13" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A15
</td>
<td class="otherCols">
<input type="radio" name="A14" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A14" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A16
</td>
<td class="otherCols">
<input type="radio" name="A15" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A15" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A17
</td>
<td class="otherCols">
<input type="radio" name="A16" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A16" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A18
</td>
<td class="otherCols">
<input type="radio" name="A17" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A17" value="11"/>
</td>
</tr>
<tr style="background-color: #CCC; height:30px">
<td class="Col1" align="left">
A19
</td>
<td class="otherCols">
<input type="radio" name="A18" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A18" value="11"/>
</td>
</tr>
<tr style="background-color: #C0C0C0;height:30px">
<td class="Col1" align="left">
A20
</td>
<td class="otherCols">
<input type="radio" name="A19" value="1"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="2"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="3"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="4"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="5"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="6"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="7"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="8"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="9"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="10"/>
</td>
<td class="otherCols">
<input type="radio" name="A19" value="11"/>
</td>
</tr>
</table>
<br/><br/>
<input type="submit" id "smallbutton" n" value="Submit"/>
</form>
</body>
</html>