Writing .php file using php code - php

Question

Hi there I'm trying to write a .php file using this code, server replying this error : syntax error, unexpected '0' (T_LNUMBER) in
I wanna know how can I write integer in php file as you can see
$status1 = \''0'\';
This code having problem, anybody please tell me what to do.
<?php
if(isset($_POST['user1'])){
$data = urldecode('%3C').'?php
$user1 = \''.$_POST['user1'].'\';
$pass1 = \''.$_POST['pass1'].'\';
$status1 = \''0'\';
$user2 = \''.$_POST['user2'].'\';
$pass2 = \''.$_POST['pass2'].'\';
$status2 = \''0'\';
$user3 = \''.$_POST['user3'].'\';
$pass3 = \''.$_POST['pass3'].'\';
$status3 = \''0'\';
$user4 = \''.$_POST['user4'].'\';
$pass4 = \''.$_POST['pass4'].'\';
$status4 = \''0'\';
$user5 = \''.$_POST['user5'].'\';
$pass5 = \''.$_POST['pass5'].'\';
$status5 = \''0'\';
$user6 = \''.$_POST['user6'].'\';
$pass6 = \''.$_POST['pass6'].'\';
$status6 = \''0'\';
$user7 = \''.$_POST['user7'].'\';
$pass7 = \''.$_POST['pass7'].'\';
$status7 = \''0'\';
$user8 = \''.$_POST['user8'].'\';
$pass8 = \''.$_POST['pass8'].'\';
$status8 = \''0'\';
$user9 = \''.$_POST['user9'].'\';
$pass9 = \''.$_POST['pass9'].'\';
$status9 = \''0'\';
$user10 = \''.$_POST['user10'].'\';
$pass10 = \''.$_POST['pass10'].'\';
$status10 = \''0'\';
?'.urldecode('%3E');
$fx=fopen('datauser.php','w');
fwrite($fx,$data);
fclose($fx);
if($fx === false) {
header("Location: ./tokensettings.php?save=err");
}
else {
header("Location: ./tokensettings.php?save=success");
}
}
?>
Thank you so much.
Here is how my form looks like.

Answer 1

If you still want to do it your way you need to use the \ correctly for each ' to be included in the string even those in [ ] - not saying the final string produced would actually work but it is based on your code and my best guess at your desired result
<?php
$string1=' \'\'.$_POST[\'user1\']\'\';';
$string1=$string1.'\'\'0\'\';';
echo $string1;
?>

Answer 2

The whole urlencoding stuff is not needed at all, your quoting and escaping is messy and incorrect. and why not simply use file_put_contents? Use HEREDOC to avoid messy escaping.
file_put_contents('datauser.php', <<<CONTENT
<?php
\$user = '{$_POST['user']}';
\$pass = '{$_POST['pass']}';
\$status = '0';
CONTENT
);
but if you really want to use files as data storage, I would encourage you to save it in a data format like xml or json instead of writing php.
// save data to file ($_POST used as example...)
file_put_contents('user.json', json_encode($_POST));
// read data
$data = json_decode(file_get_contents('user.json'));