Capture URL variable to a text field [resolved]

At the same time you want this field to be not editable in the form right?

Yes, correct--no edits. In another form product, I simply created a hidden field and used a little PHP to insert it.

You can do this like this

1. Add text field

2. Create copy of input template of the field

3. In the add readonly attribute and default value from URL.

SOmething like this.

Very cool! As a PHP novice, it took me a little to sort through this, but it worked great. Very nice demonstration of the power of the template... Thanks so much!

Here is what I did for anyone else who may need this.

1. Copied the text input template to /home/mysite/public_html/components/com_cobalt/fields/text/tmpl/input/url-variable.php

2. In Edit Field, I changed the "Template on the form" to the above template.

3. Edited the template as Sergey recommended. Code below.

<?php

/**

 * Cobalt by MintJoomla

 * a component for Joomla! 1.7 - 2.5 CMS ( http://www.joomla.org )

 * Author Website:  http://www.mintjoomla.com/ 

 * @copyright Copyright (C) 2012 MintJoomla ( http://www.mintjoomla.com ). All rights reserved.

 * @license GNU/GPL  http://www.gnu.org/copyleft/gpl.html 

 */

defined('_JEXEC') or die();

if (!empty($_GET["referral"]))# GRAB THE URL VARIABLE

 {

  $referral = $_GET["referral"];

 }

else

{

 $referral = "TeamLMI";

}

$class[] = $this->params->get('core.field_class', 'inputbox');

$required = NULL;

if ($this->required)

{

    $class[] = 'required'; 

    $required = ' required="true" ';

}

$class = ' class="' . implode(' ', $class) . '"';

$size = $this->params->get('params.size') ? ' style="width:' . $this->params->get('params.size') . '"' : '';

$maxLength = $this->params->get('params.maxlength') ? ' maxlength="' . (int)$this->params->get('params.maxlength') . '"' : '';

$readonly = ' readonly="readonly"'; #FORCE IT TO READONLY

$disabled = ((string)$this->params->get('disabled') == 'true') ? ' disabled="disabled"' : '';

$onchange = $this->params->get('onchange') ? ' onchange="' . (string)$this->params->get('onchange') . '"' : '';

$mask = $this->params->get('params.mask', 0);

?>

<?php echo $this->params->get('params.prepend');?>

# SET INPUT TO REFERRAL VALUE

<input type="text" placeholder="<?php echo $this->params->get('params.mask.mask')  ?>" name="jform[fields][<?php echo $this->id;?>]" id="field_<?php echo $this->id;?>" value="<?php echo $referral;?>"

    <?php echo $class . $size . $disabled . $readonly . $onchange . $maxLength . $required;?>>

<?php echo $this->params->get('params.append');?>



<?php if ($mask->mask_type) :?>

<script type="text/javascript">

    initMask(<?php echo $this->id;?>, "<?php echo $mask->mask;?>", "<?php echo $this->mask_type;?>");

</script>

<?php endif; ?>

All your template could look like this

<?php

/**

 * Cobalt by MintJoomla

 * a component for Joomla! 1.7 - 2.5 CMS ( http://www.joomla.org )

 * Author Website:  http://www.mintjoomla.com/ 

 * @copyright Copyright (C) 2012 MintJoomla ( http://www.mintjoomla.com ). All rights reserved.

 * @license GNU/GPL  http://www.gnu.org/copyleft/gpl.html 

 */

defined('_JEXEC') or die();

$referral = JFactory::getApplication()->input->get('referral', 'TeamLMI');

$value = $this->value ? htmlspecialchars($this->value, ENT_COMPAT, 'UTF-8') : $referral;

?>

<input type="text" name="jform[fields][<?php echo $this->id;?>]" readonly="readonly" value="<?php echo $value;?>">

You need

$value = $this->value ? htmlspecialchars($this->value, ENT_COMPAT, 'UTF-8') : $referral;

Because when you edit, there is no referral in URL and value may be lost.

Sergey, works great and much more efficient. Thanks!