Answer:- Since PHP 4.3, mysql_reate_db() is deprecated. Now you can use the following 2 alternatives. mysqli_query() , PDO::_query()

Answer:- By default, the maximum execution time for PHP scripts is set to 30 seconds. If a script takes more than 30 seconds, PHP stops the script and returns an error. You can change the script run time by changing the max_execution_time directive in the php.ini file. When a script is called, set_time_limit function restarts the timeout counter from zero. It means, if default timer is set to 30 sec, and 20 sec is specified in function set_time_limit(), then script will run for 45 seconds. If 0sec is specified in this function, script takes unlimited time.

Answer:- There are 3 types of error in PHP. 1. Notices:These are non-critical errors. These errors are not displayed to the users. 2. Warnings:These are more serious errors, but they do not result in script termination. By default, these errors are displayed to the user. 3. Fatal Errors:These are the most critical errors. These errors may cause due to immediate termination of script.

Answer:- The exit() function is used to stop the execution of PHP script.

Answer:- CRYPT() and MD5()

Answer:- The .htaccess is a configuration file on Apache server. You can change configuration settings using directives in Apache configuration files like .htaccess and httpd.conf.

Answer:- The PHP explode() function breaks a string into an array.

Answer:- The PHP split() function splits string into an array by regular expression.

Answer:- $_SERVER["REMOTE_ADDR"];

Answer:- A persistent cookie is permanently stored in a cookie file on the browsers computer. By default, cookies are temporary and are erased if we close the browser.

Answer:- imagetypes() gives the image format and types supported by the current version of GD-PHP.

Answer:- The Include() function is used to put data of one PHP file into another PHP file. If errors occur, then the include() function produces a warning but does not stop the execution of the script, and it will continue to execute. The Require() function is also used to put data of one PHP file to another PHP file. If there are any errors, then the require() function produces a warning and a fatal error and stops the script.

Answer:- A cookie is used to identify a user. A cookie is a little record that the server installs on the clients Computer. Each time a similar PC asks for a page with a program, it will send the cookie as well. With PHP, you can both make and recover cookie value. Some important points regarding Cookies: 1. Cookies maintain the session id generated at the back end after verifying the users identity in encrypted form, and it must reside in the browser of the machine 2. You can store only string values not object because you cant access any object across the website or web apps 3. Scope: - Multiple pages. 4. By default, cookies are temporary and transitory cookie saves in the browser only. 5. By default, cookies are URL particular means Gmail isnt supported in Yahoo and the vice versa. 6. Per site 20 cookies can be created in one website or web app 7. The Initial size of the cookie is 50 bytes. 8. The Maximum size of the cookie is 4096 bytes.

Answer:- PHP parser parses the PHP developed website from the opening to the closing tag. Tags indicate that from where PHP code is being started and ended. In other words, opening and closing tags decide the scope of PHP scripting syntax of closing tag in PHP syntax of closing tag in PHP