How to write into a file in PHP?

I have this script on one free PHP-supporting server:

<html>
<body>

<?php
$file = fopen("lidn.txt","a");


fclose($file);
?>

</body>
</html>

It creates the file lidn.txt, but it's empty.

How can I create a file and write something into it, for example the line "Cats chase mice"?

Solution 1:

You can use a higher-level function like:

file_put_contents($filename, $content);

which is identical to calling fopen(), fwrite(), and fclose() successively to write data to a file.

Docs: file_put_contents

Consider fwrite():

<?php
$fp = fopen('lidn.txt', 'w');
fwrite($fp, 'Cats chase mice');
fclose($fp);
?>

$fp = fopen('lidn.txt', 'w');
fwrite($fp, 'Cats chase');
fwrite($fp, 'mice');
fclose($fp);

http://php.net/manual/en/function.fwrite.php

$text = "Cats chase mice";
$filename = "somefile.txt";
$fh = fopen($filename, "a");
fwrite($fh, $text);
fclose($fh);

You use fwrite()