codeigniter - How to send large number of emails using php and shell command -

Here I am facing a problem when I send emails in the loop. Details are given below:

I have a CSV file whose name is e-mail csv. I am uploading this file and am reading email from this CSV file. I am using the Codeignit Framework. The code for reading and sending email to the CSV file, code has been given as follows.

  $ file = $ _FILES ['email_from_file'] [tmp_name]; $ Handle = fopen ($ file, "R"); If (($ $ handle = fopen ($ file, "r"))! == FALSE {while ($ data = fgetcsv ($ handle, 1000, ","))! == FALSE {$ num = count ($ data); ($ C = 0; $ c & lt; $ num; $ c ++) for {$ this- & gt; Email-> clear (); $ This- & gt; Email-> Set_mailtype ("html"); $ This- & gt; Email-> For (trim ($ data [$ c])); $ This- & gt; Email-> From ('admin@workerbee.com '); $ This- & gt; Email-> Subject ($ data ['news_letter_info'] [0] ['subject']); $ This- & gt; Email-> Message ($ data ['news_letter_info'] [0] ['template_body']); $ This- & gt; Email-> Send (); }} Fclose ($ handle); }   
 When I am sending emails, it takes a lot of time to execute and send email. And my browser is also hanging if there is a possible way to send these emails using the shell command which will execute PHP script in the background.  
 Thank you in advance   
 
 
 Use this.  
  exec ('php / & lt; server path & gt; /send_bulkmail.php');   
 In your send_bulkmail.php code, read the file using fread () or file_get_content () and send mail in the form as you did above   < / Html>