DZone Snippets: php code

str_hex and hex_str

jonasj (Jonas J.) — Tue, 16 May 2006 01:41:34 GMT

// Convert hex to string and vice versa.
//
// (Source: http://codedump.jonasjohn.de/)



function str_hex($string){

    $hex='';

    for ($i=0; $i < strlen($string); $i++){

        $hex .= dechex(ord($string[$i]));

    }

    return $hex;

}





function hex_str($hex){

    $string='';

    for ($i=0; $i < strlen($hex)-1; $i+=2){

        $string .= chr(hexdec($hex[$i].$hex[$i+1]));

    }

    return $string;

}



// example:



$hex = str_hex("test sentence...");

// $hex contains 746573742073656e74656e63652e2e2e



print hex_str($hex);

// outputs: test sentence...

Simple snoopy example

jonasj (Jonas J.) — Wed, 10 May 2006 02:40:37 GMT

// Shows how an example how you can use the Snoopy class for doing HTTP requests to other websites.
// (Source: http://codedump.jonasjohn.de/ - Public domain)
//
// You need the Snoopy class from http://snoopy.sourceforge.net/ for this snippet





include("snoopy.class.php");



$snoopy = new Snoopy;



// need an proxy?:

//$snoopy->proxy_host = "my.proxy.host";

//$snoopy->proxy_port = "8080";



// set browser and referer:

$snoopy->agent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";

$snoopy->referer = "http://www.jonasjohn.de/";



// set some cookies:

$snoopy->cookies["SessionID"] = '238472834723489';

$snoopy->cookies["favoriteColor"] = "blue";



// set an raw-header:

$snoopy->rawheaders["Pragma"] = "no-cache";



// set some internal variables:

$snoopy->maxredirs = 2;

$snoopy->offsiteok = false;

$snoopy->expandlinks = false;



// set username and password (optional)

//$snoopy->user = "joe";

//$snoopy->pass = "bloe";



// fetch the text of the website www.google.com:

if($snoopy->fetchtext("http://www.google.com")){ 

    // other methods: fetch, fetchform, fetchlinks, submittext and submitlinks

    

    // response code:

    print "response code: ".$snoopy->response_code."
\n";

    

    // print the headers:

    

    print "Headers:
";

    while(list($key,$val) = each($snoopy->headers)){

        print $key.": ".$val."
\n";

    }

    

    print "
\n";

    

    // print the texts of the website:

    print "".htmlspecialchars($snoopy->results)."\n";

    

}

else {

    print "Snoopy: error while fetching document: ".$snoopy->error."\n";

}



?>

WWW-Authenticate example

jonasj (Jonas J.) — Wed, 10 May 2006 02:33:31 GMT

// Shows how to use the WWW-Authenticate header to make login pages.You find a good tutorial at php.net
// (Source: http://codedump.jonasjohn.de/ - Public domain)





$login_successful = false;



// check user & pwd:

if (isset($_SERVER['PHP_AUTH_USER']) && isset($_SERVER['PHP_AUTH_PW'])){



    $usr = $_SERVER['PHP_AUTH_USER'];

    $pwd = $_SERVER['PHP_AUTH_PW'];



    if ($usr == 'jonas' && $pwd == 'secret'){

        $login_successful = true;

    }

}



// login ok?

if (!$login_successful){



    // send 401 headers:

    // realm="something" will be shown in the login box 

    header('WWW-Authenticate: Basic realm="Secret page"');

    header('HTTP/1.0 401 Unauthorized');

    print "Login failed!\n";



}

else {

    // show secret page:

    print 'you reached the secret page!';

}

?>