Getting strange error in PHP script running on unix

I'm running a php in a unix shell and I'm getting the following error. The script is a web scraper and it work fine on my host if I access it. But I want to run it as a cron job, What shoul I do?

Warning: file_get_contents(http://www.lomamatkat.fi/iframes/last-minute-offers/?lastminute_next=50): failed to open stream: no suitable wrapper could be found in /var/www/customers/lentovertailufi/public_html/matkat/script/lomamatkat.php on line 30 PHP Warning: file_get_contents(): URL file-access 开发者_StackOverflow社区is disabled in the server configuration in /var/www/customers/lentovertailufi/public_html/matkat/script/lomamatkat.php on line 30

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Update your php.ini file, and set the 'allow_url_fopen' option to 'On'.

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If you are unable to change allow_url_fopen consider using use curl (if must be php) or Wget

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go to the php.ini and enable that or use curl or one of the other http get functions. file_get_contents is considered a dangerous system call for urls because people can slip files into it as well.