PHP复选框问题

Question

I am going nuts here, I have an array of checkboxes from a form that I am trying to $_POST with PHP. EVERYTHING on my form posts fine except the check boxes. The checkboxes DO post, but in the wrong order. For instance when I want checkbox[0] and checkbox[2] I actually get checkbox[0] and checkbox[1].

I have tried many different ways to get the value of the checkbox, including isset but I still have the same problem. I just need the checkbox value of on to be stored in my database if the checkbox is indeed checked.

My code is below. $in_production is the checkbox. I can provide the code that generates the checkbox too if it is needed.

Thanks in advance.

if ($_GET['action'] == 'Edit_Product'){

    include("../dbinfo.php");

    $q_id = $_GET['q_id'];

    for ($i = 0; $i < count($_POST['p_id']); $i++){

        $result = mysql_query('SELECT * FROM products WHERE q_id = '.$q_id);
        $num = mysql_num_rows($result);

        $p_id = ($_POST['p_id'][$i]);
        $in_production = ($_POST['in_production'][$i]);
        $p_name = ($_POST['p_name'][$i]);
        $p_price = ($_POST['p_price'][$i]);

        $p_name_conflict = FALSE;

        for ($ii = 0; $ii < $num; $ii++){
            $row = mysql_fetch_array($result);
            $p_name_conflict_check = $row['p_name'];
            $p_id_conflict_check = $row['p_id'];

            if($p_name_conflict_check == $p_name &&
              $p_id_conflict_check != $p_id){
                $p_name_conflict = TRUE;
            }

        }

        if ($p_name_conflict == FALSE){
            $query = "UPDATE products SET p_name='$p_name',
              p_price='$p_price', in_production='$in_production',
              last_modified=CURDATE() WHERE p_id = '$p_id'";
            mysql_query($query);
        }

        else{
            $update_failures =+1;
        }

    }

    mysql_close($link);

    if($update_failures == 0){
        header("Location: Products_Updated.html");
    }

    elseif ($update_failures != 0){
        header("Location: Products_Exist.php?update_failures=".$update_failures);
    }

}

P.S. I don't know why but the code block icons are not present on SO right now... so my code is not all pretty. Also, I know my code is horribly inefficient, but I am just trying to get this working right now, then fine tune later. I am open to efficiency suggestions as well, but that is not my primary objective with this question.

EDIT: Here is the form from the HTML...

        <form id="form" name="form" method="post" action="/Management/Products/Product_Management.php?action=Edit_Product&q_id=<?php echo "$q_id" ?>">

                <?php

                    include("../dbinfo.php");   

                    $result = mysql_query('SELECT * FROM products WHERE q_id =' . $q_id);
                    $num = mysql_num_rows($result);
                    mysql_close($link);

                    for ($i = 0; $i < $num; $i++){
                        $row = mysql_fetch_array($result);

                        $p_id = $row['p_id'];
                        $p_name = $row['p_name'];               
                        $p_price = $row['p_price'];
                        $in_production = $row['in_production'];
                        $date_added = $row['date_added'];
                        $last_modified = $row['last_modified'];

                        if($in_production == 'on'){
                            $checked = 'checked';
                        }

                        else{
                            $checked = '';
                        }

                        echo "<div>Product ID# " . $p_id . "<label style=\"font-style:italic\"> (Originally added on " . $date_added . ", last modified on " . $last_modified . ")</label></div><br/>";
                        echo "<input id=\"p_id" . $p_id . "\" class=\"text\" type=\"hidden\" name=\"p_id[]\" value=\"" . $p_id . "\"/>";

                        echo "<label>Product Name *</label><br/>";
                        echo "<div><label style=\"font-style:italic\">(Product still in production <input type=\"checkbox\" name=\"in_production[]\"" . $checked . " style=\"width:15px\"/>)</label></div>";    
                        echo "<input id=\"p_name" . $p_id . "\" class=\"text\" type=\"text\" name=\"p_name[]\" maxlength=\"20\" onfocus=\"on_focus(this)\" onblur=\"on_blur(this)\" value=\"" . $p_name . "\"/><br/><br/>";

                        echo "<label>Product Price *</label><br/>";
                        echo "<div><label style=\"font-style:italic\">(Without taxes)</label></div>";
                        echo "<input id=\"p_price" . $p_id . "\" class=\"text\" type=\"text\" name=\"p_price[]\" maxlength=\"6\" onkeypress=\"return currency(this, event)\" onchange=\"currency_format(this)\" onfocus=\"on_focus(this)\" onblur=\"on_blur(this)\" value=\"" . $p_price . "\"/><br/><br/><br/><br/>";

                    }

                ?>

            <input class="button" type="button" value="Submit" onclick="product_edit_form_check()"/><br/><br/>

        </form>

Answer 1

It would be helpful if you could post some of the HTML-part so we could see how you create your form. It seems you're generating your checkboxes without indexes in your array, so all checkboxes have the name/id "checkbox[]", which is ok if you don't care about the index, but if posted, the array will be numbered starting from "0" and then counting up which is the reason why you'll get "0" and "1" posted, even if "0" and "2" were checked.

Try to give your checkboxes' name/id numbers when generating the HTML, like "checkbox[0]", "checkbox[1]", "checkbox[2]", and so on. So when checkbox 0 and 2 are checked, you should get those values (including the correct index) posted.