how to make file and push data into file in php code example

Example 1: write to file php

$myfile = fopen("newfile.txt", "w") or die("Unable to open file!");
fwrite($myfile, "Content to write to file");
fclose($myfile);

Example 2: write in a file using php

<?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);
?>