Reading and Writing to a file using fopen()

[atokatim]

I am just wondering if there is a way to open a file using php and replace certain lines in the code and leaving the rest intact. I also want to add lines after a specific line in the file.

example

$var1 = 4;
$SomeOther = "blah blah blah";
$var2 = 3;

// update after this line.

then, after running the script, it will change them to this.

$var1=4;
$SomeOther = "this has been changed";
$var2 = 6;

// update after this line.
$something = "added".

[leatherback]

Hi,

I wrote this to insert some paths and file ID's into pre-written templates. Note that in this case you need to know WHERE to insert the data, and there needs to be space. Else, you could loop through the file, read each line, write it to a temp file, until you have the line that you need to insert, write the new info, and continue reading/writing the file. After you have done the whole file, you move the tmp file in the place of the old file.

Hope it helps:

$basefile = file($basefilelocation);  

$newfname = str_replace("/","\\", $newfname);

$fp = fopen("$newfname", "w");  // create / open the new file

foreach($basefile as $line_num => $line) 
  {
  if($line_num == 3)
    {
    $writecontent = '$pageid = '.$page_id.";
    require(\"".$prefix."includes/websiteconfig.php\");
    ";
    if(!fwrite($fp, $writecontent."\n")) 
        {
        $body.= "Cannot write to file ($newfname)";
        exit();
        }
    }


   if (!fwrite($fp, $line.""))
     { 
     $body.= "Cannot write to file ($newfname)";
     exit();
     }
  }
 }

[atokatim]

so basically, i can use a script to read one file and write it to another file that the script creates while adding or changing what i want?