Please find below code to Split large SQL file into small files

$file_handle = fopen(‘sql/file.sql’,’r’); //open big file with fopen
$f = 1; //new file number
while(!feof($file_handle))
{
$newfile = fopen(‘sql/splitfile-‘ . $f . ‘.sql’,’w’); //create new file to write to with file number
for($i = 1; $i <= 3000; $i++) //for 3000 lines
{
$import = fgets($file_handle);
fwrite($newfile,$import);
if(feof($file_handle))
{break;} //If file ends, break loop
}
fclose($newfile);
//MySQL newfile insertion stuff goes here
$f++;
}
fclose($file_handle);