how to delete first line of a text file

[laura2k]

hi,

can anyone please tell me how i can open a data.txt file and remove the first line and then save it.

thanx

[jatar_k]

you could

fopen
file [ca3.php.net]
remove the first element from the resulting array
fwrite (using a loop or implode first then write)
fclose

[laura2k]

actually i need to open the file and then remove the first three lines and then save the file. how can this be done? i am a complete novice so would appreciate some detailed explanation :)

[Netizen]

Something like this should work:

$arrayOfLines=file [php.net]('yourfilename');

$linesIWant=array_slice [php.net]($arrayOfLines,3);

$fileContents=implode("\n",$linesIWant);

$fp=fopen('newfile','w+');
fwrite($fp,$fileContents);
fclose($fp);

[cached]

function delxlines($txtfile, $numlines)
{
 if (file_exists("temp.txt"))
 {
  unlink("temp.txt");
 }
 $arrayz = file("$txtfile");
 $tempWrite = fopen("temp.txt", "w");
 for ($i = $numlines; $i < count($arrayz); $i++)
 {
  fputs($tempWrite, "$arrayz[$i]");
 }
 fclose($tempWrite);
 copy("temp.txt", "$txtfile");
 unlink("temp.txt");
}

paste that into the top of your php code. Then if you want to delete the first 3 lines of bob.txt for example, you do delxlines("bob.txt", 3)