PHP的跳过空数组

Question

I have a form(page2) with 2 checkboxes when a user selects checkbox 1 the script on the 3rd page will send instructions 1 to the emailaddress. When chkbox 2 is selected it sends instructions2.

This is working but i also get errors like filename cannot be empty when only 1 chkbox is checked.

this is the code from page 2

    <form name="form" method="POST" action="instructies_verzenden2.php"> 
    <p></p>
    <input type="checkbox" name="i_allinonewebsolution" value="file_1.txt"><span       class="info-image information">All-in-One Websolution</span>
    <input type="checkbox" name="i_custommade" value="file_2.txt"><span class="info-image information">Custom Made</span>
    <input type="hidden" name="keyfield" value="<?php echo $domeinnaam?>"><input type="hidden" name="emailadres" value="<?php echo $data2[emailadres]?>"><input type="submit"  class="sub-small sub-opslaan green" value="Update gegevens">
    <p></p>
    </form>

this is the code from page 3

    // array with filenames to be sent as attachment
    $i_allinonewebsolution=$_POST['i_allinonewebsolution'];
    $i_custommade=$_POST['i_custommade'];
    $files = array("$i_allinonewebsolution","$i_custommade");

    // preparing attachments
    for($x=0;$x<count($files);$x++){
    $file = fopen($files[$x],"rb");
    $data = fread($file,filesize($files[$x]));
    fclose($file);
    $data = chunk_split(base64_encode($data));
    $message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"$files[$x]\"\n" . 
"Content-Disposition: attachment;\n" . " filename=\"$files[$x]\"\n" . 
"Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
    $message .= "--{$mime_boundary}\n";
    }

I think the problem is here:

    // array with filenames to be sent as attachment
    $i_allinonewebsolution=$_POST['i_allinonewebsolution'];
    $i_custommade=$_POST['i_custommade'];
    $files = array("$i_allinonewebsolution","$i_custommade");

I have tried to use implode and array_filter but i am doing that wrong i guess. Thanks for any help.

UPDATE

I have added the form pages to jsfiddle. there are 3 pages links are in the first jsfiddle

http://jsfiddle.net/BNDfg/3/

Answer 1

Try something like this

$files = array();
if(isset($_POST['i_allinonewebsolution'])) {
   array_push($files, $_POST['i_allinonewebsolution']);
}
if(isset($_POST['i_custommade'])) {
   array_push($files, $_POST['i_custommade']);
}

If you are wanting to scale this and have more check boxes you could put them in an array like

$checkboxes = array('i_allinonewebsolution',
                    'i_custommade',
                    'i_checkbox3',
                    'i_checkbox4');

$files = array();

foreach($checkboxes as $checkbox){
    if(isset($_POST[$checkbox])) {
       array_push($files, $_POST[$checkbox]);
    }
}

Answer 2

When I do similar things with DB queries (where results can commonly be NULL in Select queries) I do a test to see if the variable has been set.

Use isset to test if data was actually posted.

eg

if(isset($var))
//Do Action

http://php.net/manual/en/function.isset.php

Answer 3

make sure POST values are not empty, try a simple if condition like if(empty($_POST['i_allinone']) && empty($_POST['custommade'])) before you proceed into actual logic on page 2

You can also use null , is_set etc to check if the POST or REQUEST values are empty

 $i_allinonewebsolution=$_POST['i_allinonewebsolution'];
$i_custommade=$_POST['i_custommade'];
if(!empty($i_allinonewebsolution))
{
$files = array("$i_allinonewebsolution");
}
if(!empty($i_custommade))
{
$files = array("$i_custommade");
}
if(!empty($i_allinonewebsolution) && !empty($i_custommade))
{
$files = array("$i_allinonewebsolution","$i_custommade");
}

Just give a try ! Sorry for extended code.