Online PHP editor | output for JGAVd

@ 2014-05-14T10:34:53Z

<?php
$reg_exUrl = "/((http|https)\:\/\/|(www)\.)[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
$text = 'some text http://google.bg/';
        preg_match_all($reg_exUrl, $text, $matches);
        $usedPatterns = array();
        foreach($matches[0] as $pattern){
            if(!array_key_exists($pattern, $usedPatterns))
            {
                $usedPatterns[$pattern]=true;
                if(preg_match('%https://%',$pattern))
                {
                    //$start = "https://";
                }
                elseif(preg_match('%http://%',$pattern))
                {
                    //$start = "http://";
                }
                else
                {
                    $start = "http://";
                }
                
                $text = str_replace  ($pattern, "<a href='{$start}{$pattern}' target='_blank'>{$pattern}</a> ", $text);   
            }
        }
        echo  $text;

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: Undefined variable $start in /in/JGAVd on line 23 some text <a href='http://google.bg/' target='_blank'>http://google.bg/</a>
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33: Notice: Undefined variable: start in /in/JGAVd on line 23 some text <a href='http://google.bg/' target='_blank'>http://google.bg/</a>
Output for 7.3.32 - 7.3.33: some text <a href='http://google.bg/' target='_blank'>http://google.bg/</a>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3: Notice: Undefined variable: start in /in/JGAVd on line 23 some text <a href='http://google.bg/' target='_blank'>http://google.bg/</a>

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