多列的复选框与PHP

Question

Hi I want to use Multi array of checkbox with php , and i want to get all values in each array checked or not checked . my problem is the array is content only the checked value .

this is my code :-

  if($_POST['send']){
            $co = count($_POST['recomID']);
               for($i=0; $i<= $co -1 ;$i++) {
 $result = mysql_query("UPDATE `recom` SET
 `crit1` = '".$_POST['ch1'][$i] ."',
 `crit2` = '".$_POST['ch2'][$i]."',
 `crit3` = '".$_POST['ch3'][$i]."',
 `crit4` = '".$_POST['ch4'][$i]."', WHERE `id` = '".$_POST['recomID'][$i]."'");
               }
       }


 while($recomObject = mysql_fetch_object($recomResult)){

    echo '   
    <tr>
    <td>'.$recomObject->op.'</td>
    <td align="center"><input type="checkbox" value="1" name="ch1[]" /></td>
    <td align="center"><input type="checkbox" value="1" name="ch2[]" /></td>
    <td align="center"><input type="checkbox" value="1" name="ch3[]" /></td>
    <td align="center"><input type="checkbox" value="1" name="ch4[]" /></td>
    <td><input type="hidden" name="recomID[]" value="'.$recomObject->id.'"/>
    </td>
    </tr>';}

Answer 1

I have ran into this situation before and I resolved by placing a hidden input before the checkbox with the same name. If the checkbox is checked then that value will override the hidden. This should work for you.

The second input always overrides the first. In this case checkboxes don't POST if unchecked which means the hidden input would POST a value of 0

PHP:

<?php 

if (isset($_POST['ch1'])) {
    echo '<pre>', print_r($_POST['ch1'], true), '</pre>';
    echo '<pre>', print_r($_POST['ch2'], true), '</pre>';
    echo '<pre>', print_r($_POST['ch3'], true), '</pre>';
    echo '<pre>', print_r($_POST['ch4'], true), '</pre>';
}

?>

HTML:

<form action="<?php $_SERVER['PHP_SELF'] ?>" method="post">
    <!-- Row 1 Checkboxes -->
    <input type="hidden" value="0" name="ch1[0]" />
    <input type="checkbox" value="1" name="ch1[0]" />
    <input type="hidden" value="0" name="ch2[0]" />
    <input type="checkbox" value="1" name="ch2[0]" />
    <input type="hidden" value="0" name="ch3[0]" />
    <input type="checkbox" value="1" name="ch3[0]" />
    <input type="hidden" value="0" name="ch4[0]" />
    <input type="checkbox" value="1" name="ch4[0]" />

    <br />

    <!-- Row 2 Checkboxes -->
    <input type="hidden" value="0" name="ch1[1]" />
    <input type="checkbox" value="1" name="ch1[1]" />
    <input type="hidden" value="0" name="ch2[1]" />
    <input type="checkbox" value="1" name="ch2[1]" />
    <input type="hidden" value="0" name="ch3[1]" />
    <input type="checkbox" value="1" name="ch3[1]" />
    <input type="hidden" value="0" name="ch4[1]" />
    <input type="checkbox" value="1" name="ch4[1]" />

    <!-- And so forth... -->

    <input type="submit">
</form>

---

[x] [ ] [x] [ ]
[ ] [x] [ ] [x]  [ SUBMIT ]

Output:

Array
(
    [0] => 1
    [1] => 0
)
Array
(
    [0] => 0
    [1] => 1
)
Array
(
    [0] => 1
    [1] => 0
)
Array
(
    [0] => 0
    [1] => 1
)

Edit

$i = 0;
while($recomObject = mysql_fetch_object($recomResult)){
    echo '   
        <tr>
        <td>'.$recomObject->op.'</td>
        <input type="hidden" value="0" name="ch1['.$i.']" />
        <input type="hidden" value="0" name="ch2['.$i.']" />
        <input type="hidden" value="0" name="ch3['.$i.']" />
        <input type="hidden" value="0" name="ch4['.$i.']" />
        <td align="center"><input type="checkbox" value="1" name="ch1['.$i.']" /></td>
        <td align="center"><input type="checkbox" value="1" name="ch2['.$i.']" /></td>
        <td align="center"><input type="checkbox" value="1" name="ch3['.$i.']" /></td>
        <td align="center"><input type="checkbox" value="1" name="ch4['.$i.']" /></td>
        <td><input type="hidden" name="recomID[]" value="'.$recomObject->id.'"/>
        </td>
        </tr>';
    $i++;
}