I decided I needed to have html attributes for my anchors generated by the auto_link helper so I did a quick extension. Didn’t notice anyone else had posted it, so I thought I’d share. Perhaps this is too trivial for the wiki…but maybe this will help someone.
btw - of course this extension goes in ./application/helpers/MY_url_helper.php
/**
* Modifies the auto_link helper (url_helper) by accepting as an optional third
* argument an array of html attributes for the anchor tags (just like the anchor helper).
*
* This array is supplied as the third argument, replacing the
* optional argument $pop in the original helper.
*
* This modified helper attempts to be backward compatible with the use of the
* original helper by accepting TRUE and FALSE as possible values for the $attributes
* argument, and giving output identical to the original usage of the helper.
*
* use: auto_link($string, 'url' , array('class' => 'external', 'target'=>'_blank'));
* use: auto_link($string, 'email', array('class' => 'email_link' , 'style' => 'color:red;'));
* use(legacy): auto_link($string, 'url' , TRUE);
*
* @see url_helper
* @link http://codeigniter.com/user_guide/helpers/url_helper.html
* @param string $str
* @param string $type
* @param mixed $attributes
* @return string
*/
function auto_link($str, $type = 'both', $attributes = '')
{
// MAKE THE THIRD ARGUMENT BACKWARD COMPATIBLE
// here we deal with the original third argument $pop
// which could be TRUE or FALSE, and was FALSE by default.
$pop = '';
if ($attributes === TRUE)
{
$pop = ' target="_blank" ';
$attributes = '';
}
elseif ($attributes === FALSE)
{
$pop = $attributes = '';
}
if ($type != 'email')
{
if (preg_match_all("#(^|\s|\()((http(s?)://)|(www\.))(\w+[^\s\)\<]+)#i", $str, $matches))
{
if( $attributes != '' )
{
$attributes = _parse_attributes($attributes);
}
for ($i = 0; $i < count($matches['0']); $i++)
{
$period = '';
if (preg_match("|\.$|", $matches['6'][$i]))
{
$period = '.';
$matches['6'][$i] = substr($matches['6'][$i], 0, -1);
}
$str = str_replace($matches['0'][$i],
$matches['1'][$i].'<a href="http'.
$matches['4'][$i].'://'.
$matches['5'][$i].
$matches['6'][$i].'">http'.
$matches['4'][$i].'://'.
$matches['5'][$i].
$matches['6'][$i].'</a>'.
$period, $str);
}
}
}
if ($type != 'url')
{
if (preg_match_all("/([a-zA-Z0-9_\.\-\+]+)@([a-zA-Z0-9\-]+)\.([a-zA-Z0-9\-\.]*)/i", $str, $matches))
{
for ($i = 0; $i < count($matches['0']); $i++)
{
$period = '';
if (preg_match("|\.$|", $matches['3'][$i]))
{
$period = '.';
$matches['3'][$i] = substr($matches['3'][$i], 0, -1);
}
$str = str_replace($matches['0'][$i], safe_mailto($matches['1'][$i].'@'.$matches['2'][$i].'.'.$matches['3'][$i]).$period, $str,$attributes);
}
}
}
return $str;
}//END