In PHP, there are three types of arrays: 1. Indexed arrays: An array with a numeric index where values are stored linearly. 2. Associative arrays: An array with strings as index. This stores element values in association with key values rather than in a strict linear index order. 3. Multidimensional arrays: These are arrays that contain other arrays within them. Now, let's discuss $_SESSION, $_COOKIE, and $_REQUEST. 1. $_SESSION: This is a superglobal variable which is used to store information in a session variable. It's an associative array containing session variables available to the current script. Here is an example: ```php ``` In the above example, a session variable "name" is set. 2. $_COOKIE: This is a superglobal variable which is used to retrieve cookie values. It's an associative array of variables passed to the current script via HTTP Cookies. Here is an example: ```php 0) { echo "Cookies are enabled."; } else { echo "Cookies are disabled."; } ? ``` In the above example, a cookie named "test_cookie" is set and then a check is performed to see if cookies are enabled. 3. $_REQUEST: This is a superglobal variable which is used to collect data after submitting an HTML form. It's an associative array that by default contains the contents of $_GET, $_POST and $_COOKIE. Here is an example: ```php
Name:
``` In the above example, the form data is sent with the HTTP POST method. When the user clicks the submit button in the HTML form, the form data is sent to "php_self". The "php_self" is a super global variable that returns the filename of the script that's being executed. The request method is checked and if it's a POST method, the form data is handled.

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In PHP, there are three types of arrays: 1. Indexed arrays: An array with a numeric index where values are stored linearly. 2. Associative arrays: An array with strings as index. This stores element values in association with key values rather than in a strict linear index order. 3. Multidimensional arrays: These are arrays that contain other arrays within them. Now, let's discuss $_SESSION, $_COOKIE, and $_REQUEST. 1. $_SESSION: This is a superglobal variable which is used to store information in a session variable. It's an associative array containing session variables available to the current script. Here is an example: ```php ``` In the above example, a session variable "name" is set. 2. $_COOKIE: This is a superglobal variable which is used to retrieve cookie values. It's an associative array of variables passed to the current script via HTTP Cookies. Here is an example: ```php 0) { echo "Cookies are enabled."; } else { echo "Cookies are disabled."; } ?> ``` In the above example, a cookie named "test_cookie" is set and then a check is performed to see if cookies are enabled. 3. $_REQUEST: This is a superglobal variable which is used to collect data after submitting an HTML form. It's an associative array that by default contains the contents of $_GET, $_POST and $_COOKIE. Here is an example: ```php ``` In the above example, the form data is sent with the HTTP POST method. When the user clicks the submit button in the HTML form, the form data is sent to "php_self". The "php_self" is a super global variable that returns the filename of the script that's being executed. The request method is checked and if it's a POST method, the form data is handled.

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In PHP, there are three types of arrays: 1. Indexed arrays: An array with a numeric index where values are stored linearly. 2. Associative arrays: An array with strings as index. This stores element values in association with key values rather than in a strict linear index order. 3. Multidimensional arrays: These are arrays that contain other arrays within them. Now, let's discuss $_SESSION, $_COOKIE, and $_REQUEST. 1. $_SESSION: This is a superglobal variable which is used to store information in a session variable. It's an associative array containing session variables available to the current script. Here is an example: ```php ``` In the above example, a session variable "name" is set. 2. $_COOKIE: This is a superglobal variable which is used to retrieve cookie values. It's an associative array of variables passed to the current script via HTTP Cookies. Here is an example: ```php 0) { echo "Cookies are enabled."; } else { echo "Cookies are disabled."; } ?> ``` In the above example, a cookie named "test_cookie" is set and then a check is performed to see if cookies are enabled. 3. $_REQUEST: This is a superglobal variable which is used to collect data after submitting an HTML form. It's an associative array that by default contains the contents of $_GET, $_POST and $_COOKIE. Here is an example: ```php ``` In the above example, the form data is sent with the HTTP POST method. When the user clicks the submit button in the HTML form, the form data is sent to "php_self". The "php_self" is a super global variable that returns the filename of the script that's being executed. The request method is checked and if it's a POST method, the form data is handled.

What are the different types of arrays in PHP? Explain $_SESSION, S_COOKIE,$_REQUEST with example

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What are the different types of arrays in PHP? Explain `$_SESSION`, `$_COOKIE`, `$_REQUEST` with example

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