'."\n";
// if 'testfile.txt' exists, we try to write in the middle of it.
// the result can be viewed with a simple texteditor like notepad or so.
if ( file_exists( 'testfile.txt' ) ):
$FileHandle = fopen( 'testfile.txt','a+' ); // open the file
fseek( $FileHandle ,5 ); // position the filepointer
$Pos = ftell( $FileHandle ); // verify its position
echo 'Position of filepointer: ' . $Pos . '.
'."\n"; // and tell us
$Text = 'abcdefghijklmnop'; // create some text
fwrite( $FileHandle ,$Text ,16 ); // write it to the file
fclose( $FileHandle ); // close the file
echo 'Existing testfile changed.
'."\n";
// if there is no file called 'testfile.txt', then we create it.
else:
$FileHandle = fopen( 'testfile.txt','w+' ); // create the file
$Text = 'This piece of text is 36 bytes long.'; // create some text
fwrite( $FileHandle ,$Text ,36 ); // write it to the file
fclose( $FileHandle ); // close the file
echo 'New testfile created.
'."\n";
endif;
// end html-code
echo '