Technology Questions

Both GET and POST are used to collect data from a form. However, when security is desired $_POST should be used. When the $_ POST variable is used, all variables used are NOT displayed in the URL. Also, they have no restrictions to the length of the variables. GET should be used when the interaction with the form is more like a question. For e.g. firing a query etc. POST should be used more often when the interaction is more like an order or the interaction changes the state of the resource.

POST example:

<form action="sample.php" method="post">

Name: <input type="text" name="name" />

Age: <input type="text" name="age" />

<input type="submit" />

</form>

On clicking submit the URL resembles to: https://www.mysamplesite.com/sample.php

The sample.php file can be used for catching the form data using $_POST 

Hello <?php echo $_POST["name"]; ?>.<br />

You are <?php echo $_POST["age"]; ?> years old!

GET EXAMPLE

<form action="sample.php" method="get">

Name: <input type="text" name="name" />

Age: <input type="text" name="age" />

<input type="submit" />

</form>

On clicking submit the URL resembles to : https://www.mysamplesite.com/sample.php?name=jim&age=37

The sample.php file can be used for catching the form data using $_GET 

Hello <?php echo $_GET["name"]; ?>.<br />

You are <?php echo $_GET["age"]; ?> years old!

PHP’s configuration file is called php.ini.

Server control events can be handled inside a server itself

Compiler Design,

 Operating System,

 Database Management System,

Statistical analysis package,

Numerical Analysis,

 Graphics,

 Artificial Intelligence,

 Simulation

Use the DBMS_OUTPUT package. Another possible method is to use the SHOW ERROR command.

Opendir():- It opens the directory. This function returns a directory stream on success and FALSE and an error on failure.

Syntax:

Opendir(directory, context)

Context is a set of options that can modify the behavior of a stream

Example: opens sample directory.

$dir = opendir("directory");

Readdir(): It returns an entry from a directory handle opened by opendir().

Syntax:

Readdir(dir_stream)

Example:

$file = readdir($dir);

closedir(): It closes a directory handle opened by opendir().

Syntax:

closedir(dir_stream)

Example:

$file = close($dir);