Checkbox with Result from Database in PHP - php

Question

I have a record fetch from database based on a dropdown selection.The result is shown as a table, in which the user is expected to tick his choice.After the selection,the user clicks a button which will automatically add his selection to a table.Now the issue is: the id that is fetched for each item changes when the button is clicked by turning it to ascending number.see image below:
For instance, in the table below, id 773,774,777,895 and 901 are selected.When Add to Float Button is cliked, the Id now becomes: 773,774,775,776,777(arranged ascending). See code below:
for Displaying Table
<table>
<tr>
<td><input type="text" value="<?php echo $r['item_code'];?>" name="itmcode[]" readonly="readonly"/></td>
<td><?php echo $r['description'];?></td>
<td><?php echo $r['qty'];?></td>
<td><?php echo $r['price_per_qty'];?>
<td><input type="text" value="<?php echo $r['total_value'];?>" name="tvalue[]" readonly="readonly" /></td>
<td><?php echo $r['preferred_supplier'];?></td>
<td><input type="checkbox" name="chkbx[]" value="<?php echo $r['id'];?>">
<input type="hidden" name="gid[]" value="<?php echo $r['id'];?>">
</tr>
</table>
Processing Script:
<?php
if(array_key_exists('chkbx', $_POST)&&(!empty($_POST['chkbx']))&&(isset($_POST['floatBtn']))){
foreach($_POST['chkbx'] as $rec=>$value)
{
$itm = $_POST['itmcode'][$rec];
$tval = $_POST['tvalue'][$rec];
$t = $_POST['gid'][$rec];
$apno =$_POST['aNo'];
$fno = $_POST['fno'];
echo "itm:".$itm." tval: ".$tval." t:".$t." appno:".$apno."fno:".$fno."<br/>";
}
}
?>
How can I correct this, so that it can display the correct id when the button is clicked after selecting.

Answer 1

Change your code like this
<table>
<tr>
<td><input type="text" value="<?php echo $r['item_code'];?>" name="itmcode[]" readonly="readonly"/></td>
<td><?php echo $r['description'];?></td>
<td><?php echo $r['qty'];?></td>
<td><?php echo $r['price_per_qty'];?>
<td><input type="text" value="<?php echo $r['total_value'];?>" name="tvalue[]" readonly="readonly" /></td>
<td><?php echo $r['preferred_supplier'];?></td>
<td><input type="checkbox" name="chkbx[]" value="<?php echo $r['id'];?>">
//change gid[] to gid[<?php echo $r['id'];?>]
<input type="hidden" name="gid[<?php echo $r['id'];?>]" value="<?php echo $r['id'];?>">
</td>
</tr>
</table>
in processing
<?php
if(array_key_exists('chkbx', $_POST)&&(!empty($_POST['chkbx']))&& (isset($_POST['floatBtn']))){
foreach($_POST['chkbx'] as $rec=>$value)
{
$itm = $_POST['itmcode'][$rec];
$tval = $_POST['tvalue'][$rec];
$t = $_POST['gid'][$value]; //--> changed from $_POST['gid'][$rec] to $_POST['gid'][$value]
$apno =$_POST['aNo'];
$fno = $_POST['fno'];
echo "itm:".$itm." tval: ".$tval." t:".$t." appno:".$apno."fno:".$fno."<br/>";
}
}
?>
The issue when you post the data with the checkbox checked, you get an array like this
Array
(
[itmcode] => Array
(
[0] => 1"
[1] => 1"
[2] => 1"
)
[tvalue] => Array
(
[0] => 5
[1] => 5
[2] => 5
)
[chkbx] => Array
(
[0] => 1
)
[gid] => Array
(
[0] => 1
[1] => 2
[2] => 3
)
)
so when looping the $_POST['chkbx'], the value for
`$_POST['gid'][$rec] always loops with the keys of $_POST['chkbx'] which is 0,1,2 etc always. So you get values of $_POST['gid'][0], $_POST['gid'][1],$_POST['gid'][2], etc which is 773, 774, 775 respectively.