mysql_fetch_array – Fetch a result row as an associative array, a numeric array, or both
mysql_fetch_assoc – Fetch a result row as an associative array
mysql_fetch_object – Fetch a result row as an object
mysql_fetch_row —- Get a result row as an enumerated array… Read more

CRYPT()
MD5()… Read more

To know the image size use getimagesize() function
To know the image width use imagesx() function
To know the image height use imagesy() function… Read more

By the use of void set_time_limit(int seconds)

Set the number of seconds a script is allowed to run. If this is reached, the script returns a fatal error. The default limit is 30 seconds or, if it exists, the max_execution_time value defined in the php.ini. If seconds is set to … Read more

setcookie(‘variable’,’value’,’time’);

variable – name of the cookie variable
value – value of the cookie variable
time – expiry time
Example: setcookie(‘Test’,$i,time()+3600);

Test – cookie variable name
$i – value of the variable ‘Test’
time()+3600 – denotes that the cookie will expire after an one hour… Read more

Reset a cookie by specifying expire time in the past:
Example: setcookie(‘Test’,$i,time()-3600); // already expired time

Reset a cookie by specifying its name only
Example: setcookie(‘Test’);… Read more

Using imagetypes() function to find out what types of images are supported in your PHP engine.
imagetypes() -Returns the image types supported by the current PHP installation.
This function returns a bit-field corresponding to the image formats supported by the version of GD linked into PHP. The following bits are … Read more

session_id() returns the session id for the current session.… Read more

All of those are open source resource. Security of  Linux is very more than windows. Apache is a better server that IIS both in functionality and security. Mysql is world most popular open source database. Php is more faster that asp or any other scripting language.… Read more

One of the main advantages of OO programming is its easy of modification; objects can easily be modified and added to a system there by reducing maintenance costs. OO programming is also considered to be better at modeling the real world than is procedural programming. It allows for more complicated … Read more