Quick & Simple question. [PHP with Javascript]

[Joshua4550]

Hey.

 

Just wondering, if I loop through textboxes with PHP, and insert query for each - that if I added a new textbox with javascript, when submitted - would PHP read that one too? I'll write some code, maybe it'll explain with more ease.

 

PHP code (When form submitted)

$connection = mysql_connect('***', '***', '***');
$database = mysql_select_db('***');
for ($i = $_POST['txtboxNum']; $i >= 1; $i--) {
    echo $i;
}
$number = 0;
$query = mysql_query("SELECT * FROM field");
while ($array = mysql_fetch_array($query)) {  
  $number++;
  echo '<input type="text" name="txtbox'.$number.'" value="hello '.$number.'" />';
}
echo '<input type="hidden" name="txtboxNum" value="'.$number.'" />';

 

If I were to make a Javascript code to add another textbox into the code with a name of the next number, when submitted - would PHP be able to read that? I'm only asking because Javascript is client-side and not sure if PHP reads frfom browser or what. I'm just not 100%, so need reassurance.

 

PS: Ignore any logic errors with the PHP code, if there are any. I just wrote this up in the thread body field, my version of this works fine. Just need the question answered (:

Thanks alot.

[Adam]

To answer your question, yes the data would get submitted. Couldn't you have just done a test to find out though?

[Joshua4550]

Nope because I've got to make a more complex Javascript code before I can make the one to write another textbox in.

 

Thank you.

[DavidAM]

Make sure you include the array brackets on the name when you name it using Javascript or it will not be part of the array:

 

<FORM action="" method="POST">
<INPUT type="text" name="txtData[]">
<INPUT type="text" name="txtData[]">
<INPUT type="text" name="txtData[]">
</FORM>

 

When POSTed this will produce an array in PHP:

foreach ($_POST['txtData'] as $field) {
  echo $field . PHP_EOL;
}

 

When you add the field in Javascript, you need to make sure you set the name to "txtData[]" so it will be part of the array.

 

Note: I've never actually done this, but my experience scanning through the form elements in Javascript seem to bear this out.