/home/edulekha/crm.edulekha.com/application/services/utilities/StrClickable.php
<?php
namespace app\services\utilities;
defined('BASEPATH') or exit('No direct script access allowed');
trait StrClickable
{
/**
* Callback for clickable
*/
protected static function make_url_clickable_cb($matches)
{
$ret = '';
$url = $matches[2];
if (empty($url)) {
return $matches[0];
}
// removed trailing [.,;:] from URL
if (in_array(substr($url, -1), [
'.',
',',
';',
':',
]) === true) {
$ret = substr($url, -1);
$url = substr($url, 0, strlen($url) - 1);
}
return $matches[1] . "<a href=\"$url\" rel=\"nofollow\" target='_blank'>$url</a>" . $ret;
}
/**
* Callback for clickable
*/
protected static function make_web_ftp_clickable_cb($matches)
{
$ret = '';
$dest = $matches[2];
$dest = 'http://' . $dest;
if (empty($dest)) {
return $matches[0];
}
// removed trailing [,;:] from URL
if (in_array(substr($dest, -1), [
'.',
',',
';',
':',
]) === true) {
$ret = substr($dest, -1);
$dest = substr($dest, 0, strlen($dest) - 1);
}
return $matches[1] . "<a href=\"$dest\" rel=\"nofollow\" target='_blank'>$dest</a>" . $ret;
}
/**
* Callback for clickable
*/
protected static function make_email_clickable_cb($matches)
{
$email = $matches[2] . '@' . $matches[3];
return $matches[1] . "<a href=\"mailto:$email\">$email</a>";
}
/**
* Check for links/emails/ftp in string to wrap in href
* @param string $ret
* @return string formatted string with href in any found
*/
public static function clickable($ret)
{
$ret = ' ' . $ret;
// in testing, using arrays here was found to be faster
$ret = preg_replace_callback('#([\s>])([\w]+?://[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is', fn($matches) => self::make_url_clickable_cb($matches), $ret);
$ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is', fn($matches) => self::make_web_ftp_clickable_cb($matches), $ret);
$ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', fn($matches) => self::make_email_clickable_cb($matches), $ret);
// this one is not in an array because we need it to run last, for cleanup of accidental links within links
$ret = preg_replace('#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i', '$1$3</a>', $ret);
$ret = trim($ret);
return $ret;
}
}