write-to-file-using-ob.php


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<?php

ob_start();

echo '<?php'; // this will go into our file
// stop php from interpreting, now write content of file freely!
?> 
echo 'hello, world!';

<?php
echo '?>'; // this will go into our file

$content = ob_get_flush();
file_put_contents('foo.txt', $content);

?>