Writing a php document inside a php block

The way you are delimiting the text may not be correct. You use " marks to delimit the contents of the variable, but within it there are multiple quotation marks, thus the text breaks . In this case, use the syntax nowdoc .

Example

$str = <<<'EOD'
Exemplo de uma string
distribuída em várias linhas
utilizando a sintaxe nowdoc.
EOD;

Your code should look like this:

<?php

$cn = "texto.php";

file_put_contents($cn, '');

// Inicio Codigo que queria que fosse escrito
$conteudo = <<<'EOD'
<?php

require_once('./data_classes/server-data.php_data_classes-core.php.php');
require_once('./data_classes/server-data.php_data_classes-session.php.php');

$select = "SELECT * FROM cms_settings WHERE variable='client_ip'";
$result = mysql_query($select);
while($l = mysql_fetch_array($result)){
$cliendfgtip = $l['value'];
}

$select = "SELECT * FROM cms_settings WHERE variable='client_port'";
$result = mysql_query($select);
 while($l = mysql_fetch_array($result)){
$clienghjport = $l['value'];
}

mysql_query("UPDATE users SET auth_ticket = '', auth_ticket = '".GenerateTicket()."', ip_last = '', ip_last = '".$remote_ip."' WHERE id = '".$my_id."'") or die(mysql_error());

$ticketsql = mysql_query("SELECT * FROM users WHERE id = '".$my_id."'") or die(mysql_error());
$ticketrow = mysql_fetch_assoc($ticketsql);

$client_port = mysql_fetch_assoc($client_port = mysql_query("SELECT * FROM cms_settings WHERE variable = 'client_port'"));
$client_mus = mysql_fetch_assoc($client_mus = mysql_query("SELECT * FROM cms_settings WHERE variable = 'client_mus'"));
$client_ip = mysql_fetch_assoc($client_ip = mysql_query("SELECT * FROM cms_settings WHERE variable = 'client_ip'"));
$client_variables = mysql_fetch_assoc($client_variables = mysql_query("SELECT * FROM cms_settings WHERE variable = 'client_variables'"));
$client_variables_night = mysql_fetch_assoc($client_variables_night = mysql_query("SELECT * FROM cms_settings WHERE variable = 'client_variables_night'"));
$client_texts = mysql_fetch_assoc($client_texts = mysql_query("SELECT * FROM cms_settings WHERE variable = 'client_texts'"));
$client_swf_path = mysql_fetch_assoc($client_swf_path = mysql_query("SELECT * FROM cms_settings WHERE variable = 'client_swf_path'"));
$client_habbo_swf = mysql_fetch_assoc($client_habbo_swf = mysql_query("SELECT * FROM cms_settings WHERE variable = 'client_habbo_swf'"));
$client_limit = mysql_fetch_assoc($client_limit = mysql_query("SELECT * FROM cms_settings WHERE variable = 'cms_clientlimit'"));
$caca="deltoro";
if($caca=="delavaca"){

  echo"<script>alert(\"Edita la Configuración de tu Hotel en el Housekeeping\");</script>
 <meta http-equiv=\"refresh\" content=\"0;url=".$adminpath."/index/p/login&do=secretcode\">";

} elseif($user_rank < 0 && $online_count >= $client_limit['value']){

require_once('./templates/login_subheader.php');
require_once('./templates/login_header.php');

?>

<br>
<div id="intermediate">
<h2><center>Límite de Clientes</center></h2>
<div id="enter-hotel">
<div class="open enter-btn">
<a href="http://servidor2.lavvos.com" target="client" onclick="return onClientOpen(this)">Ir al Servidor 2<i></i></a><b></b>
</div>
</div>

<div id="info">
Atualmente temos <b><?php echo $online_count; ?> <?php echo $shortname; ?>s </b> Conectados ao servidor com o limite de <b><?php echo $client_limit['value']; ?>Onlines.</div>

<?php require_once('./templates/login_footer.php'); }else{ require_once('./templates/client_subheader.php'); ?>
<script type="text/javascript">
    FlashExternalInterface.loginLogEnabled = true;

   FlashExternalInterface.logLoginStep("web.view.start");

   if (top == self) {
        FlashHabboClient.cacheCheck();
    }
    var flashvars = {
    "client.allow.cross.domain" : "1",
        "client.notify.cross.domain" : "0",
            "connection.info.host" : "<?php echo $client_ip['value'] ?>",
            "connection.info.port" : "<?php echo $client_port['value'] ?>",
        "site.url" : "ihoby.habboproject.net",
        "url.prefix" : "http://ihoby.habboproject.net",
        "client.reload.url" : "ihoby.habboproject.net/client.php",
        "client.fatal.error.url" : "http://ihoby.habboproject.net/client.php",
        "client.connection.failed.url" : "http://ihoby.habboproject.net/client.php",
        "external.variables.txt" : "http://198.50.206.76/phx/vari.php?username=<?php echo $name; ?>",
        "use.sso.ticket" : "1",
        "sso.ticket" : "<?php echo $ticketrow['auth_ticket']; ?>",
        "processlog.enabled" : "1",
        "account_id" : "1",
        "client.starting" : "Olá <?php echo $name; ?>, aguarde, está carregando.",
        "flash.client.url" : "http://198.50.206.76/phx/dcr/hof_furni/",
        "has.identity" : "1",
        "flash.client.origin" : "popup"


    };
    var params = {
        "base" : "http://198.50.206.76/phx/",
        "allowScriptAccess" : "always",
        "menu" : "false"              
   };

   if (!(HabbletLoader.needsFlashKbWorkaround())) {
      params["wmode"] = "opaque";
    }

    FlashExternalInterface.signoutUrl = "<?php echo $path; ?>/account/logout?token=<?php echo sha1($myrow['password']); ?>";

   var clientUrl = "http://198.50.206.76/phx/Habbo.swf";

     swfobject.embedSWF(clientUrl, "flash-container", "100%", "100%", "10.0.0", "http://images.habbo.com/habboweb/63_1dc60c6d6ea6e089c6893ab4e0541ee0/424/web-gallery/flash/expressInstall.swf", flashvars, params);

   window.onbeforeunload = unloading;
    function unloading() {
        var clientObject;
        if (navigator.appName.indexOf("Microsoft") != -1) {
            clientObject = window["flash-container"];
        } else {
            clientObject = document["flash-container"];
        }
        try {
            clientObject.unloading();
        } catch (e) {}
    }
</script>


<meta name="description" content="Lavvo Hotel: haz amig@s, únete a la diversión y date a conocer." />
<meta name="keywords" content="lavvo hotel, mundo, virtual, red social, gratis, comunidad, personaje, chat, online, adolescente, roleplaying, unirse, social, grupos, forums, seguro, jugar, juegos, amigos, adolescentes, raros, furni raros, coleccionable, crear, coleccionar, conectar, furni, muebles, mascotas, diseño de salas, compartir, expresión, placas, pasar el rato, música, celebridad, visitas de famosos, celebridades, juegos en línea, juegos multijugador, multijugador masivo" />



<!--[if IE 8]>
<link rel="stylesheet" href="<?php echo $path; ?>/web-gallery/static/styles/ie8.css" type="text/css" />
<![endif]-->
<!--[if lt IE 8]>
<link rel="stylesheet" href="<?php echo $path; ?>/web-gallery/static/styles/ie.css" type="text/css" />
<![endif]-->
<!--[if lt IE 7]>
<link rel="stylesheet" href="<?php echo $path; ?>/web-gallery/static/styles/ie6.css" type="text/css" />
<script src="<?php echo $path; ?>/web-gallery/static/js/pngfix.js" type="text/javascript"></script>
<script type="text/javascript">
try { document.execCommand('BackgroundImageCache', false, true); } catch(e) {}
</script>

<style type="text/css">
body { behavior: url(/js/csshover.htc); }
</style>
<![endif]-->

<meta name="build" content="63-BUILD406 - 09.05.2011 23:04 - de" />
</head>

<body id="client" class="flashclient">
<div id="overlay"></div>
<img src="<?php echo $path; ?>/web-gallery/v2/images/page_loader.gif" style="position:absolute; margin: -1500px;" />

<div id="overlay"></div>
<div id="client-ui" >
    <div id="flash-wrapper">
    <div id="flash-container">
        <div id="content" style="width: 400px; margin: 20px auto 0 auto; display: none">
<div class="cbb clearfix">
    <h2 class="title">Por favor, actualiza tu Flash Player a la última versión</h2>

    <div class="box-content">
            <p>Puedes instalar y descargar Adobe Flash Player aquí: <a href="http://get.adobe.com/flashplayer/">Instala Flash player</a>. Más instrucciones para su instalación aquí: <a href="http://www.adobe.com/products/flashplayer/productinfo/instructions/">Más información</a></p>
            <p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://images.habbo.com/habboweb/63_1dc60c6d6ea6e089c6893ab4e0541ee0/424/web-gallery/v2/images/client/get_flash_player.gif"alt="Get Adobe Flash player" /></a></p>
    </div>
</div>
        </div>
        <script type="text/javascript">
            $('content').show();
        </script>

        <noscript>
            <div style="width: 400px; margin: 20px auto 0 auto; text-align: center">
                <p>If you are not automatically redirected, please <a href="/client">click here</a></p>
            </div>
        </noscript>
    </div>
    </div>
  <div id="content" class="client-content"></div>  
<?PHP
$rand =rand(0,100);
if($rand < 85){
//PUBLI EDU
?>


<?PHP
} else {
//PUBLICIDAD HECTOR
?>


<?PHP
}
?>

</div>
    <div style="display: none">
<div id="habboCountUpdateTarget">
1,323 Mitglieder online
</div>
  <script language="JavaScript" type="text/javascript">
      setTimeout(function() {
        HabboCounter.init(600);
      }, 20000);
  </script>

    </div>
    <script type="text/javascript">
        RightClick.init("flash-wrapper", "flash-container");
        if (window.opener && window.opener != window && window.opener.location.href == "/") {
            window.opener.location.replace("/me");
        }
        $(document.body).addClassName("js");
        HabboClient.startPingListener();
    </script>
<div id="fb-root"></div>
<script type="text/javascript">
    (function() {
        var e = document.createElement('script');
        e.async = true;
        e.src = 'https://connect.facebook.net/de_DE/all.js';
        document.getElementById('fb-root').appendChild(e);
    }());
</script>


        <iframe name="logframe" src="/bc/logframe?" width="0" height="0" frameborder="0" scrolling="no" marginwidth="0" marginheight="0" style="position: absolute; top:0; left:0"></iframe>


<iframe name="conversion-tracking" src="/conversion_tracking_frame" width="0" height="0" frameborder="0" scrolling="no" marginwidth="0" marginheight="0" style="position: absolute; top:0; left:0"></iframe>



<script type="text/javascript">
    HabboView.run();
</script>
<script type="text/javascript" src="anuncio.js"></script>

</body>
</html>
<?php } 
?>
EOD;
// Fim codigo que queria que fosse escrito.

$escreveu = file_put_contents($cn, $conteudo);
if ($escreveu == FALSE){
    echo "Erro ao escrever arquivo";
} else {
    echo "Arquivo escrito com sucesso";
}

?>

Another way you can use to write the string in the file is with the file_put_contents .

Something like:

$escreveu = file_put_contents("texto.php", $conteudo);
if ($escreveu == FALSE){
  // Não foi possível escrever no arquivo..
} else {
  // Sucesso..
}