Serious Cron job issues ..

<?
// DB connection code here 
 
 
$url = 'http://www.financialappointments.com/xmlfeed.aspx?adage=1';   
//$url='finance.xml';
$xml = simplexml_load_file($url);
//print_r($xml);
//echo $xml->job->title;
foreach ($xml->job as $item)
{
 
$sql_array=array(   "publisherName"=>"Financial Appointments",
									"dt_date"=>date("Y-m-d"),
									"publisherID"=>3,
									"publisherURL"=>"http://www.financialappointments.com/xmlfeed.aspx?adage=1",
									"title"=>(string) $item->title,
									"company"=>(string) $item->company,
									"companyref"=>(string) $item->companyref,
									"expiryDate"=>date('Y-m-d', strtotime("+28 days")),
									"description"=>(string) $item->description,
									"location"=>(string) $item->location,
									"country"=>(string) $item->country,
									"postCode"=>(string) $item->postcode,
									"salaryBenefits"=>(string) $item->salarybenefits,
									"salaryFrom"=>(string)$item->salary_from,
									"salaryTo"=>(string) $item->salary_to,
									"jobType"=>(string) $item->jobtype,
									"experience"=>(string) $item->experience,
									"sector"=>(string) $item->sector,
									"url"=>(string) $item->url
									);
					//print_r($sql_array);
							update_data("jobs_data",$sql_array,$conn,'insert',$sql_array,$conn);	
}
 
//-----------------------------------------------------
function update_data($table, $data,$link,$action = 'insert', $parameter1,$parameter2) 
	{
		
    reset($data);
				
				if ($action == 'insert')
						 {
						  $query = 'insert into ' . $table . ' (';
						  while (list($columns, ) = each($data)) {
							$query .= $columns . ', ';
							
						  }
						  $query = substr($query, 0, -2) . ') values (';
						  reset($data);
						  while (list(, $value) = each($data)) {
							switch ((string)$value) {
							  case 'now()':
								$query .= 'now(), ';
								break;
							  case 'curdate()':
								$query .= 'curdate(), ';
								break;
							  case 'null':
								$query .= 'null, ';
								break;
							  default:
								$query .= '\'' . db_input($value) . '\', ';
								break;
							}
						  }
						  $query = substr($query, 0, -2) . ')';
					 	//  print($query);
						mysql_query($query);
				}
 
    //return execute($query, $link);
  }
  function db_input($string) {
	return addslashes($string);
	}
  function execute($query,$conn){/*
//		$result = mysql_query($query, $db_conn) or error($query, mysql_errno(), mysql_error());
 
		$result = mysql_query($query, $conn);
		return $result;
	*/}
?>