php write file converts single quotes to double quotes

Question

My code is like this

$fp = fopen('text.php', 'w');
fwrite($fp, $_POST['code']);
fclose($fp);

But if $_POST['code'] has single quotes (') output will be 2 single quotes for example:
if input is 'test'

if we open text.php output will

''test''

i also tried file_put_contents() but same result How can i solve this problem?

edit

for $_POST['code']; exit() also i am getting same output

Answer 1

Try re-installing your lamp server.