我有一個php代碼添加/刪除新行(tr)到html表格。一列(td)有文本字段,第二列(td)有一個下拉列表。下拉菜單是 mysql表。 第一行(tr)值正確。但是dropdonwn列表爲空當我添加新行(TR)值沒有出現在下拉列表中
代碼:
<html>
<head>
<title></title>
<style type="text/css">
input {
display: block; /* makes one <input> per line */
}
</style>
</head>
<?php
include 'dbconnection\dbconnection.php'; // Database connection
$count=1;
if(isset($_POST['btnadd']) == "ADD NEW ITEM") {
// add 1 to the row counter
if (isset($_POST['count'])) $count = $_POST['count'] + 1;
// set value for first load
else $count = 1;
}
if(isset($_POST['btnremove']) == "DELTE ITEM") {
// decrement the row counter
$count = $_POST['count'] - 1;
// set minimum row number
if ($count < 1) $count = 1;
}
?>
<body>
<!-- call same file on submit -->
<form name="form1" method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<?php
$cdquery="select cmc_id,cmc_name from cat_main_category";
$result2=mysqli_query($conn,$cdquery) or die(mysqli_error());
echo '<table>';
// print $count rows
for ($i=1; $i<=$count; $i++) {
echo ' <tr> <td> <input type="text" name="text'.$i.'" align="center"> </td>';
echo '<td> <select id="basicgroup'.$i.'" name="basicgroup'.$i.'" onchange=reload(this.form)>';
echo '<option value=0>Select</option>';
while ($row=mysqli_fetch_array($result2)) {
$cdTitle=$row["cmc_name"];
$id=$row["cmc_id"];
//if([email protected]$basicgroup){
echo "<option selected value=$id>
$cdTitle
</option>";
/*}
else{echo "<option value=$id>
$cdTitle
</option>""."<BR>";;*/
}
echo '</select></td></tr> ';
}
?>
</table>
<!-- you only need one set of buttons and only one counter for this script
because every button would do the same -->
<input type="submit" name="btnadd" id="btnadd" value="ADD NEW ITEM" >
<input type="submit" name="btnremove" id="btnremove" value="DELETE ITEM">
<input type="hidden" name="count" value="<?php echo $count; ?>">
</form>
</body>
</html>
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