嗨,我正在开发一个 php 表单,当按下添加按钮时,它必须动态添加一个表格行,并且我正在使用 for 循环来保存值,问题是它没有将数据保存到我的数据库中并给出错误我的文本框的循环值未定义任何人都可以帮助我这是我的脚本
<?php
session_start();
?>
<!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">
<script language="javascript" type="text/javascript">
var i=1;
function addRow()
{
var tbl = document.getElementById('table1');
var lastRow = tbl.rows.length;
var iteration = lastRow - 1;
var row = tbl.insertRow(lastRow);
var firstCell = row.insertCell(0);
var el = document.createElement('input');
el.type = 'text';
el.name = 'name' + i;
el.id = 'name' + i;
el.size = 20;
el.maxlength = 20;
firstCell.appendChild(el);
var secondCell = row.insertCell(1);
var el2 = document.createElement('input');
el2.type = 'text';
el2.name = 'address' + i;
el2.id = 'address' + i;
el2.size = 20;
el2.maxlength = 20;
secondCell.appendChild(el2);
var thirdCell = row.insertCell(2);
var el3 = document.createElement('input');
el3.type = 'text';
el3.name = 'contactNum' + i;
el3.id = 'contactNum' + i;
el3.size = 20;
el3.maxlength = 20;
thirdCell.appendChild(el3);
alert(i);
i++;
frm.h.value=i;
alert(i);
}
</script>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title></head>
<body>
<form action="submit.php" method="post" name="frm" id="frm">
<table width="40%" border="2" cellpadding="0" cellspacing="0" id="table1">
<tr>
<td><strong>Name</strong></td>
<td><strong>Address</strong> </td>
<td><strong>Contact Num</strong> </td>
</tr>
<tr>
<td><input name="name" type="text" id="name" size="20" maxlength="20" /></td>
<td><input name="address" type="text" id="address" size="20" maxlength="20" /></td>
<td><input name="contactNum" type="text" id="contactNum" size="20" maxlength="12" /></td>
</tr>
</table>
<input type="button" value="Add" onclick="addRow();" />
<input name="Submit" type="submit" value="Submit" />
<label>
<input name="h" type="hidden" id="h" value="0" />
</label>
</form>
</body>
</html>
这是我的 submit.php 代码
<?php
mysql_connect("localhost", "root", '')or die(mysql_error());
mysql_select_db("test") or die(mysql_error());
$num = $_POST['h'];
for($i=0;$i<=$num;$i++)
{
$name = $_POST["name_$i"];
$address = $_POST["address_$i"];
$contactNum = $_POST["contactNum_$i"];
mysql_query("INSERT INTO `com`(`name`, `add`, contact) Values('$name', '$address', '$contactNum')") or die(mysql_error());
}
echo "<h1>Done!</h1>";
?>