| Name |
Code |
A class to put get and post variables in hidden form
|
< ? php
class c_HiddenVars
{
function display($a)
{
$c = Count($a);
for ($i = 0, Reset($a); $i < $c; $i++, Next($a))
{
$k = Key($a); $v = $a[$k];
if (is_array($v))
{
$vc = Count($v);
for (Reset($v), $vi = 0; $vi < $vc; $vi++, Next($v))
{
$vk = Key($v);
echo "< input type=hidden name=\"$k\[$vk\]\" value=\"".htmlspecialchars($v [$vk]). "\">\n";
}
}
else
{
echo "< input type=hidden name=\"$k\" value=\"".htmlspecialchars($v). "\">\n";
}
}
}
function get()
{
global $HTTP_GET_VARS;
if (is_array($HTTP_GET_VARS))
{
$this->display
($HTTP_GET_VARS);
}
}
function post()
{
global $HTTP_POST_VARS;
if (is_array($HTTP_POST_VARS))
{
$this->display
($HTTP_POST_VARS);
}
}
function all()
{
$this->get();
$this->post();
}
};
?>
|
Add Slashes Recursively
|
< ?
function aslashes($array)
{
if(is_array($array))
{
foreach($array as $key => $val)
{
if(is_array($key)
{
return aslashes($key);
}
else
{
$return[$key] = stripslashes($val); // recurse
}
}
return($return);
}
else
{
return(addslashes($array)); // return slash'ed value
}
}
? >
|
Age from DATE
|
//Input format: YYYY-MM-DD
function years_age($birthday)
{
list($year,$month,$day) = explode("-",$birthday);
$year_diff = date("Y") - $year;
$month_diff = date("m") - $month;
$day_diff = date("d") - $day;
if ($day_diff < 0 || $month_diff < 0)
$year_diff--;
return $year_diff;
}
|
Array Insertion
|
class arrayAll
{
var $startError = 'Warning:Check your input parameters';
var $endError = '';
function Insert($array = '', $position = '' , $elements= '')
{
if ($position == '' || $array == '' || $elements == '' || $position < 1 || $position > count($array)+1)
{
echo $this->startError . "insert".$this->endError;
}
else
{
$left = array_slice ($array, 0, $position+1);
$right = array_slice ($array, $position+1,count($array));
for($i=1; $i< COUNT($elements) ; $i++)
{
$insert[$i] .= $elements[$i] ;
}
$array = array_merge ($left, $insert, $right);
// echo " Left Count : " . COUNT($left) . "
\n";
// echo " Insert Count : " . COUNT($insert) . "
\n";
// echo " Right Count : " . COUNT($right) . "
\n";
unset($left, $right, $insert);
}
unset ($position, $elements);
return $array ;
}
}
|
Binary to Text
|
< ?
function bin2text($bin_str)
{
$text_str = '';
$chars = explode("\n", chunk_split(str_replace("\n", '', $bin_str), 8));
$_I = count($chars);
for($i = 0; $i < $_I; $text_str .= chr(bindec($chars[$i])), $i );
return $text_str;
}
function text2bin($txt_str)
{
$len = strlen($txt_str);
$bin = '';
for($i = 0; $i < $len; $i )
{
$bin .= strlen(decbin(ord($txt_str[$i]))) < 8 ? str_pad(decbin(ord($txt_str[$i])), 8, 0, STR_PAD_LEFT) : decbin(ord($txt_str[$i]));
}
return $bin;
}
print text2bin('How are you gentlements?');
? >
|
Cookie
|
- What is a Cookie?
A cookie is often used to identify a user. A cookie is a small file that the server embeds on the user's computer. Each time the same computer requests a page with a browser, it will send the cookie too. With PHP, you can both create and retrieve cookie values.
- How to Create a Cookie?
Syntax:
setcookie(name, value, expire, path, domain);
Example -
setcookie("user", "Alex Porter", time()+3600);
- How to Retrieve a Cookie Value?
The PHP $_COOKIE variable is used to retrieve a cookie value.
Example -
// Print a cookie
echo $_COOKIE["user"];
// A way to view all cookies
print_r($_COOKIE);
- How to Delete a Cookie?
When deleting a cookie you should assure that the expiration date is in the past.
// set the expiration date to one hour ago
setcookie("user", "", time()-3600);
|
Cookie Example
|
Checking for Cookie Support from PHP
< ? php
if(!isset($_GET['testcookie']))
{
setcookie("testcookie", "test value");
header("Location: {$_SERVER["PHP_SELF"]}?testcookie=1");
exit;
}
else
{
if(isset($_COOKIE['testcookie']))
{
setcookie("testcookie");
echo "You have cookies enabled";
}
else
{
echo "You do not support cookies!";
}
}
? >
Reading all cookie values
< ? php
foreach ($_COOKIE as $cookie_name => $cookie_value)
{
print "$cookie_name = $cookie_value
";
}
? >
Still Logged In with cookie
< ? php
$auth = $_COOKIE['auth'];
header( "Cache-Control:no-cache" );
if( ! $auth == "ok" )
{
header("Location:login.php" );
exit();
}
? >
Printing a cookie value
< ? php
print 'Hello, ' . $_COOKIE['userid'];
?>
Reading a cookie value
< ? php
if (isset($_COOKIE['flavor']))
{
print "You ate a {$_COOKIE['flavor']} cookie.";
}
?>
|
Create a database
|
< ? php
$db = "newdb";
//connect to server with username and password
$connection = @mysql_connect ("localhost","root", "") or die (mysql_error());
//connect to database
$result = @mysql_create_db($db, $connection) or die(mysql_error());
if ($result)
{
echo"Database has been created!";
}
?>
|
Authenticate user: Database based
|
< ? php
function authenticate_user()
{
header('WWW-Authenticate: Basic realm="Secret Stash"');
header("HTTP/1.0 401 Unauthorized");
exit;
}
if (! isset($_SERVER['PHP_AUTH_USER']))
{
authenticate_user();
}
else
{
mysql_pconnect("localhost","authenticator","secret") or die("Can't connect to database server!");
mysql_select_db("abcd") or die("Can't select authentication database!");
$query = "SELECT username, pswd FROM user WHERE username='$_SERVER[PHP_AUTH_USER]' AND pswd=MD5('$_SERVER[PHP_AUTH_PW]')";
$result = mysql_query($query);
// If nothing was found, reprompt the user for the login information.
if (mysql_num_rows($result) == 0)
{
authenticate_user();
}
}
? >
|
Get data from database query
|
< ? php
$cnx = mysql_connect('mysql153.secureserver.net','abcd','password');
mysql_select_db('abcd');
$employees = @mysql_query('SELECT ID, FirstName FROM Employee');
if (!$employees)
{
die('Error retrieving employees from database!'.
'Error: ' . mysql_error() );
}
while ($employee = mysql_fetch_array($employees))
{
$id = $employee['ID'];
$name = htmlspecialchars($author['Name']);
echo("$name ");
v echo("$id");
}
? >
|
Reviewed by Abdul hanan
on
05:20:00
Rating:
