我正在尝试根据用户的需求将特定记录输出到.csv。到目前为止,我能够使.csv工作,但现在我正在尝试从表单中获取记录,我不断收到消息,它无法获取我的sql记录。
是的,你可能会说我的PHP代码放在页面顶部可能是个问题,但我把它放在那里的原因是为了避免将html标签打印到.csv文件中。
这是我目前的代码:
<?php
if(isset($_POST['submit']))
{
$material = $_POST['materials'];
mysql_connect('localhost', 'root', 'pw');
mysql_select_db ("db");
$result = mysql_query("SELECT " . $material . " FROM materials");
if (!$result)
die('Couldn\'t fetch records');
$num_fields = mysql_num_fields($result);
$headers = array();
for ($i = 0; $i < $num_fields; $i++)
{
$headers[] = mysql_field_name($result , $i);
}
$fp = fopen('php://output', 'w');
if ($fp && $result)
{
header('Content-Type: text/csv');
header('Content-Disposition: attachment; filename="export.csv"');
header('Pragma: no-cache');
header('Expires: 0');
fputcsv($fp, $headers);
while ($row = mysql_fetch_row($result))
{
fputcsv($fp, array_values($row));
}
die;
}
}
?>
<h1>Generate Reports</h1>
<form enctype="multipart/form-data" action="create" method="post">
<table>
<tr>
<td><strong>Materials</strong></td>
<?php
mysql_connect('localhost', 'root', 'pw');
mysql_select_db ("db");
$sql = "SELECT material_name FROM materials";
$result = mysql_query($sql);
echo "<td><select name='materials'>";
while ($row = mysql_fetch_array($result))
{
echo "<option value='" . $row['material_name'] . "'>" .
$row['material_name'] . "</option>";
}
echo "</select></td></tr> ";
$sql2 = "SELECT location_name From locations";
$result2 = mysql_query($sql2);
?>
<td><strong>Locations</strong></td>
<?php
echo "<td><select name='locations'>";
while ($row2 = mysql_fetch_array($result2))
{
echo "<option value='" . $row2['location_name'] . "'>" .
$row2['location_name'] . "</option>";
}
echo "</select></td></tr>";
?>
<tr>
<td><button name="submit" type=submit>Generate</button></td>
</tr>
</table>
</form>
答案 0 :(得分:2)
你想从表中获取特定材料的记录吗?
如果您使用 -
$result = mysql_query("SELECT " . $material . " FROM materials");
这一行看起来不太好..实际上选择必须具有where子句的材料,并且在变量$ material的位置,你需要传递你要为所有列选择或*的列。您的查询可能是这样的 -
$result = mysql_query("SELECT * FROM materials where Material_Name = ".$material);
现在它将返回材料表中所有记录,其中材料名称是您传递的值。