Split a file after a new line and before the size limit

[tarja311]

Hey all,

 

I have a script that reads in data from a flat text file. What it does is it chops the file up into chunks based on the file-size that it is given. For instance, if i set the file-size limit to 80KB, it is going to split the file when it reaches 80KB, and will continue to do so until it reaches the end of the flat text file.

 

What i want it to do is i want it to split the file as soon as it reaches the end of the line rather than splitting it exactly at 80KB. I ask this because it is chopping right through a line and continuing that same line in another file. I want it to reach the end of the line first before splitting the file.

 

This is what i am working with:

 

function file_chop_big($file_path, $chunk_size) {
   $size = filesize($file_path);
  
   //find number of full $chunk_size byte portions
   $num_chunks = floor($size / $chunk_size);
  
   $file_handle = fopen($file_path, 'r');
  
   $chunks = array();
  
   for($kk = 0; $kk < $num_chunks; $kk++) {
     $chunks[$kk] = basename($file_path).'.chunk'.($kk + 1);
     $chunk_handle = fopen($chunks[$kk], 'w');   //open the chunk file for writing
  
     //write the data to the chunk file 1k at a time
     while((ftell($chunk_handle) + 1024) <= $chunk_size) {
       fwrite($chunk_handle, fread($file_handle, 1024));
     } // end while-loop.
  
     if(($leftover = $chunk_size - ftell($chunk_handle)) > 0 ) {
       fwrite($chunk_handle, fread($file_handle, $leftover));
     } // end if.
  
     fclose($chunk_handle);
   } // end for-loop.
  
   if(($leftover = $size - ftell($file_handle)) > 0) {
     $chunks[$num_chunks] = basename($file_path).'.chunk'.($num_chunks + 1);
     $chunk_handle = fopen($chunks[$num_chunks], 'w');
   
     while(!feof($file_handle)) {
       fwrite($chunk_handle, fread($file_handle, 1024));
     } // end while-loop.
  
     fclose($chunk_handle);
   } // end if.
  
   fclose($file_handle);
  
   return $chunks;
} // end function.

 

I am not exactly sure where and how i can write 80KB to the file, then keep writing until i hit a newline character.

 

Any ideas?

 

Thanks