Adding a line to the beggining of a file

[speerross]

I'm trying to add a string to the beggining of an xml file; I've tried the standard fopen, fwrite etc:

 

$c=1;
while ($c<=($filenum)) {

$xmlfile1 = "splits/".$basefilename."-".$c.".xml";
$handler = @fopen($dir."/$xmlfile1","r+");
fwrite($handler,$batchid);
fclose($handler);
$c++;

}

 

This works, but as it adds the line it deletes text already in the file (which I need to preserve). What is the best method to solve this?

[JonnoTheDev]

Read the file into a variable.

Add your lines to another variable.

Concatenate the two variables into a third variable.

Write the third variable back to the file.

[trq]

<?php

  $file = file_get_contents('foo.txt');
  $file = "new line of text\n" . $file;
  file_put_contents('foo.txt', $file);

?>