Reading .dat files per 10 lines

Michiel

Hi,

I've got a script that reads the content of a .dat file line by line. Each line is being cut in pieces using explode() and the bits are printed in a lay-out. Now I'dd like to be able to only show the first 10 lines, and the second 10 lines when the user clicks 'next 10 messages' etc. etc. How do I achieve this? This is my current script:


$filename = "reacties.dat"; 
$fd = fopen($filename, "r"); 
while (!feof($fd)) 
      { 
      $line = fgets($fd, 10000); 
      $line_array = explode("|", $line); 
      $title = $line_array[0]; 
      $name = $line_array[1]; 
      $email = $line_array[2]; 
      $date = $line_array[3]; 
      $ip = $line_array[4]; 
      $message = $line_array[5]; 

  //Here the data is printed into my own lay-out 

  }

Thanx, Michiel

bobthedog

Just pass in an offest to the script, and after you open the file, but before you start recording entries, just skip foward that many lines and discard the contents

i.e.

for ($intCounter = 0; $intCounter < $intOffset; $intCounter++)
{
    fgets($fp, 5000);
}

well - something like that anyhow. Then proceed into your loop to return the results.

jnuneznyc

Ok first just read the file into an array with

$fileArray = file(FILENAME);

Then do a for loop that loops 10x

for(i=0;i==10;i++)

So you will now have the following code that will only return 10 lines you might want to put this in a function and make the number 10 into a variable so you can use the same function to return the 20 line version

$filename = "reacties.dat"; 
$fArray = file($filename); 
for(i=0;i==10;i++)
      { 
      $line = $fArray[i];
      $line_array = explode("|", $line); 
      $title = $line_array[0]; 
      $name = $line_array[1]; 
      $email = $line_array[2]; 
      $date = $line_array[3]; 
      $ip = $line_array[4]; 
      $message = $line_array[5]; 

  //Here the data is printed into my own lay-out 

  }

Let me know if this works out.

Michiel

Hi,

thank you guys for your replies. Both your solutions work (of course 😉). But I think i'll stik to the for-loop of bobthedog. I think this is the fastest way, 'cos the method of jnuneznyc reads the entire file every time I want to view some of the lines at the very beginning (and then throws it all away). The method of bobthedog doesn't read more than stricly needed and is therefore faster, I guess.

Thanks, Michiel.