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How can i fix RSS feed import?

[01-Jul-2015 23:17:25 UTC] PHP Fatal error: Call to undefined function trigger_rss_error() in /home/name/domains/ on line 238
can I using the PHP function "filter_var()" to check the url:?

i have some problem with submit link from bookmark button in browser bookmark bar.
i found the problem and when i remove this code, problem solved.
File : /submit.php (about line 190-200)

$isLink = preg_match($pattern, $url); // Returns true if a link

Why are you not using the PHP function "filter_var()" to check the url:

$isLink = filter_var($url, FILTER_VALIDATE_URL);


can i use this?
Please help me to solve this issue, In 15 Hours 231 Same Errors >

PHP Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/user/public_html/class.compiler.php on line 246
Anyone know how to edit the 'welcome_mail_main.php' file, to customize welcome email message text? thx/mike
after use 1-2 weeks, Please tell me how to resolve, my domain
I see various other questions relating to issues with the RSS Import module but none that answer my question. I am trying to automatically import RSS feeds using a cron job but for some reason it is not working. I've verified with my host tech support that the cron function is working and that the path I am using to the import.php file is correct, but for some reason the file isn't running. I'm not experienced with the command line interface and am using my host's account control panel to set up the cron job. Does anyone have any suggestions? When I access the /import.php file via a browser nothing happens. As far as I can tell it is the correct import.php file I've seen in various threads/blogs offering instructions on running the RSS import module with a cron job.
Becouse I use free Whois domain lookup tool for finding domain names ownership information, registration data and much more -
I am interested in your opinion =)))