fwrite to the top of txt file

[MeinHerzBrennt]

<?php
$filename = 'messages.txt';
$somecontent = "<a href=mailto:".$_POST["mail"].">".$_POST["name"]."</a>: ".$_POST["message"]."<BR>";

// Let's make sure the file exists and is writable first.
if (is_writable($filename)) {

// In our example we're opening $filename in append mode.
// The file pointer is at the bottom of the file hence 
// that's where $somecontent will go when we fwrite() it.
if (!$fp = fopen($filename, 'a')) {
     print "Cannot open file ($filename)";
     exit;
}

// Write $somecontent to our opened file.
if (!fwrite($fp, $somecontent)) {
    print "Cannot write to file ($filename)";
    exit;
}

header ("Location: board.php");
exit;

fclose($fp);

} else {
    print "The file $filename is not writable";
}
?>

thats my current code, can some one edit this or show me how i can make it write to the top of the text file?

[MeinHerzBrennt]

is there a way to get the contents, put the new stuff, then append the old stuff?

[daveyboy]

when you open the file to append to it, run [man]rewind/man to move the pointer to the start of the file.

[Weedpacket]

...although, considering that you'll want to overwrite what's already in the file before you write the new stuff (so that the new stuff goes before the old stuff, which will be rewritten after the new stuff), rewind() won't really be that much help.

It's generally better to write a new temporary file, and then replace the old one with it.

1. Open the file for reading

2. read it

3. close it

4. Open a new file for reading

5. Write new stuff

6. Write old stuff

7. close it.

8. Check it

9. delete old file

10. rename new file to old name

This has the extra advantage that the text file is intact and available for reading the whole time (except for the interval between the last two steps).