$myfile = fopen("newfile.txt", "w") or die("Unable to open file!");
fwrite($myfile, "Content to write to file");
fclose($myfile);// if not file is there then automatic create and write inside it.
$fptr = fopen('myfile.txt','w');
fwrite($fptr,"i am writing file in this\n");
fwrite($fptr,'writing another line.');
fclose($fptr);<?php
$myfile = fopen("file_name.txt", "w") or die("Unable to open file!");
$txt = "Hello world\n";
fwrite($myfile, $txt);
$txt = " Php.\n";
fwrite($myfile, $txt);
fclose($myfile);
?>