Moving the File Pointer

MaxD

How can I move the pointer to a specific line in a file and get that line?

the path I'm exploring right now is this:

 
<?php 
// p = the entry to start on ( p * 4 = line number) 
// n = number of entries to display per page 

if ($_GET['n'] == ""){ 
  $numPerPage = 3; 
} else ($numPerPage = $_GET['n']); 

if ($_GET['p'] == ""){ 
  $startLine = 0; 
} else ($startLine = $_GET['p']); 

$startLine = $startLine * 4 

$numOnPage = 0 

$handle = fopen('file.txt','r'); 

do { 
  for ($i = $startLine; $i <=  $startLine+4; $i++) { 
      //read (line to array[$i]); 
  } 
  //format the gathered lines and echo them 
  $numOnPage++ 
} while ($numOnPage < $numPerPage); 

fclose($handle) 
?>

now obviously this is vanilla code, if someone could please point me in the right direction, as far as how to move the pointer to the correct line and then grab the line...

MaxD

I've been researching the problem for the last couple of days, but everyone is treating my like a leper! Is there no way to tell php to skip to a specific line in a file without having to scroll line by line through the file? If not, just tell me, please don't ignore me.

pyro

Hmm... If I understand you correctly, something like this might do it for you:

<?PHP
$contents = file("directory/file.txt");
$startline = 3;
$endline = 5;
for ($i=$startline-1; $i<$endline; $i++) {
	echo $contents[$i];
}
?>

MaxD

whats wrong here?

<?php 
// p = the entry to start on ( p * 4 = line number) 
// n = number of entries to display per page 

if ($_GET['n'] == ""){ 
  $numPerPage = 3; 
} else ($numPerPage = $_GET['n']); 

if ($_GET['p'] == ""){ 
  $startLine = 0; 
} else ($startLine = $_GET['p']); 

$stln = $startLine 

$numOnPage = 0 

$handle = fopen('file.txt','r'); 

do { 
  // grab the lines

  $icon = $handle[$stln+0]; 
  $dt = $handle[$stln+1]; 
  $text = $handle[$stln+2]; 
  $mus  = $handle[$stln+3]; 

  // format the gathered lines and echo them 
  echo 'formatted lines...';

  $numOnPage++ 
} while ($numOnPage < $numPerPage); 

fclose($handle) 
?>