Writing data to the BEGINNING of a flat file???

Discussion in 'PHP' started by dp-user-1, Oct 12, 2006.

0
  1. #1
    I need this script to write the data to the beginning of the file, rather than the end.

    SCRIPT:
    <html>
<head>
<title>Posting</title>
</head>
<body>
<?php 
$date = $_GET["date"];
$title = $_GET["title"]; 
$message = $_GET["message"];
print("Post submitted.");
$out = fopen($_SERVER['DOCUMENT_ROOT'].'/blogfile.txt', "a"); 
if (!$out) { 
print("Could not append to file"); 
exit; 
} 
fputs ($out,implode,("\n")); 
fwrite($out,"$date|$title|$message");
fwrite($out,("\n"));
fclose($out);
?>
</body>
</html>
    PHP:
    I know it may not seem logical to you, but it does to me. Thanks for the help.
     
    dp-user-1, Oct 12, 2006 IP
  2. tflight

    tflight Peon

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    #2
    Change this: 
    $out = fopen($_SERVER['DOCUMENT_ROOT'].'/blogfile.txt', "a");
    PHP:
    to this: 
    $out = fopen($_SERVER['DOCUMENT_ROOT'].'/blogfile.txt', "r+");
    PHP:
    Here is the applicable section in the manual for the PHP fopen function.
     
    tflight, Oct 12, 2006 IP
  3. dp-user-1

    dp-user-1 Well-Known Member

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    #3
    But that overwrites the existing data. :(
     
    dp-user-1, Oct 12, 2006 IP
  4. SoKickIt

    SoKickIt Active Member

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    #4 
    <html>
<head>
<title>Posting</title>
</head>
<body>
<?php 
$date = $_GET["date"];
$title = $_GET["title"]; 
$message = $_GET["message"];
print("Post submitted.");
$file = $_SERVER['DOCUMENT_ROOT'].'/blogfile.txt';
$out = fopen($file, "r+"); 
if (!$out) { 
print("Could not append to file"); 
exit; 
} 
$old_content = fread($out, filesize($file));
fputs ($out,implode,("\n")); 
fwrite($out,"$date|$title|$message");
fwrite($out,("\n"));
fwrite($out, $old_content);
fclose($out);
?>
</body>
</html>
    PHP:
     
    SoKickIt, Oct 12, 2006 IP
  5. dp-user-1

    dp-user-1 Well-Known Member

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    #5
    It works, but not entirely.

    I need:
    NEW DATA
    OLD DATA

    That script makes:
    OLD DATA
    NEW DATA
    OLD DATA
     
    dp-user-1, Oct 12, 2006 IP
  6. SoKickIt

    SoKickIt Active Member

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    #6
    Try this:

    $out = fopen($file, "w+");
    PHP:
     
    SoKickIt, Oct 12, 2006 IP
  7. tflight

    tflight Peon

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    #7
    Have you tried opening it for appending mode (like the original code) but then using something like: 
    fseek($out, 0);
    PHP:
    Which should rewind the pointer to the beginning?
     
    tflight, Oct 12, 2006 IP
  8. dp-user-1

    dp-user-1 Well-Known Member

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    #8
    fseek($out, 0); didn't work.

     
    dp-user-1, Oct 12, 2006 IP
  9. dp-user-1

    dp-user-1 Well-Known Member

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    #9
    I tried that too, but it just replaced the new post each time, if I remember correctly.
     
    dp-user-1, Oct 12, 2006 IP
  10. dp-user-1

    dp-user-1 Well-Known Member

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    #10 
    <html>
<head>
<title>Posting</title>
</head>
<body>
<?php 
$date = $_GET["date"];
$title = $_GET["title"]; 
$message = $_GET["message"];
print("Post submitted.");
$file = $_SERVER['DOCUMENT_ROOT'].'/blogfile.txt';
$file2 = $_SERVER['DOCUMENT_ROOT'].'/blogfile2.txt';
$old = fopen($file, "r"); 
$old_content = fread($old, filesize($file));
$new_content = fread($new, filesize($file2));
$new = fopen($file2, "w+");
fwrite($new, $old_content);
fclose($new);
$old = fopen($file, "w");
fclose($old);
$old = fopen($file, "a");
fputs ($old,implode,("\n"));
fwrite($old,"$date|$title|$message");
fwrite($old,("\n"));
fwrite($old, $new_content);
fclose($old);
?>
</body>
</html>
    PHP:
    I'm trying to use a new file as a sort of "cache," but it's not working. Any ideas why?
     
    dp-user-1, Oct 12, 2006 IP
  11. pondlife

    pondlife Peon

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    #11
    I had a similar problem that I solved by using the append (putting the new info in at the end of the file) and then displaying it by reading it back via reversing the array. Array_Reverse function info here: http://uk.php.net/function.array-reverse

    I've changed my code recently but I think it looked like this (reading the file back):
    HTH. :)
     
    pondlife, Oct 12, 2006 IP
  12. dp-user-1

    dp-user-1 Well-Known Member

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    #12
    GOT IT!!!!

    <html>
<head>
<title>Posting</title>
</head>
<body>
<?php 
$date = $_GET["date"];
$title = $_GET["title"]; 
$message = $_GET["message"];
print("Post submitted.");
$file = $_SERVER['DOCUMENT_ROOT'].'/blogfile.txt';
$file2 = $_SERVER['DOCUMENT_ROOT'].'/blogfile2.txt';
{
//Imports old data
$old = fopen($file, "r");
$old_content = fread($old, filesize ($file));
fclose($old);

//Writes new data
$new = fopen($file2, "w");
fputs ($new,implode,("\n"));
fwrite($new,"$date|$title|$message");
fwrite($new,("\n"));
fwrite($new,$old_content);
fclose($new);

//Imports new data
$new = fopen($file2, "r");
$new_content = fread($new, filesize ($file2));
fclose($new);

//Replaces old data
$old = fopen($file, "w+");
fwrite($old,$new_content);
fclose($old);
} 

?>
</body>
</html>
    PHP:
     
    dp-user-1, Oct 12, 2006 IP
  13. dp-user-1

    dp-user-1 Well-Known Member

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    #13
    Thanks for all the input, guys!
     
    dp-user-1, Oct 12, 2006 IP
  14. Nickwiz

    Nickwiz Peon

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    #14
    If you do the whole write in one. And then close the file; why not:

    

   // With file_get_contents()
   $file = 'log.txt';
   $data = date("H:i:s",time())."\tThis is some \n text; foo was here.\n";
   $log  = fopen($file,is_file($file)?"r+":"w+");
   fwrite($log,$data.file_get_contents($file));
   fclose($log);
    PHP:
    ;or...

    

   //With file()
   $file = "log.txt";
   $data = date("H:i:s",time())."\tThis is some \n text; foo was here.\n";
   $log  = fopen($file,is_file($file)?"r+":"w+");
   fwrite($log,$data.implode('',file($file)));
   fclose($log);
    PHP:


    **

    And from your code in first post;


    

<html>
<head>
  <title>Posting</title>
</head>
<body>
<?php

  $date    = $_GET["date"];
  $title   = $_GET["title"];
  $message = $_GET["message"];
  $bfile   = $_SERVER['DOCUMENT_ROOT'].'/blogfile.txt';

  print("Post submitted.");

  if(!$out=fopen($bfile,is_file($bfile)?"r+":"w+"))
    die("Could not append to file");

  fwrite($out,"$date|$title|$message\n".file_get_contents($bfile));
  fclose($out);

?>
</body>
</html>
    PHP:
     
    Nickwiz, Oct 23, 2006 IP