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 variable to be used across multiple pages. A session is started with the session_start() function. For example: ```php ``` In this example, a session is started and a name is stored in the session variable. This name can now be accessed on any page that starts with session_start(). 2. $_COOKIE: This is a superglobal variable which is used to store information on the user's computer. For example: ```php "; echo "Value is: " . $_COOKIE["name"]; } ? ``` In this example, a cookie named "name" is set to "StudyAssistant". The cookie is set to expire in one day. 3. $_REQUEST: This is a superglobal variable which is used to collect data after submitting an HTML form. For example: ```php
Name:
``` In this example, when the user inputs their name and submits the form, the name is collected and displayed on the page.

Question

In PHP, there are three types of arrays:

Indexed arrays: An array with a numeric index where values are stored linearly.
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.
Multidimensional arrays: These are arrays that contain other arrays within them.

Now, let's discuss $_SESSION,$ _COOKIE, and $_REQUEST.

$_SESSION: This is a superglobal variable which is used to store information in a variable to be used across multiple pages. A session is started with the session_start() function. For example:

<?php
   session_start();
   $_SESSION["name"] = "StudyAssistant";
   echo 'Hello, ' . $_SESSION["name"];
?>

In this example, a session is started and a name is stored in the session variable. This name can now be accessed on any page that starts with session_start().

$_COOKIE: This is a superglobal variable which is used to store information on the user's computer. For example:

<?php
   setcookie("name", "StudyAssistant", time() + (86400 * 30), "/"); // 86400 = 1 day
   if(!isset($_COOKIE["name"])) {
     echo "Cookie named 'name' is not set!";
   } else {
     echo "Cookie 'name' is set!<br>";
     echo "Value is: " . $_COOKIE["name"];
   }
?>

In this example, a cookie named "name" is set to "StudyAssistant". The cookie is set to expire in one day.

$_REQUEST: This is a superglobal variable which is used to collect data after submitting an HTML form. For example:

<html>
<body>

<form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
  Name: <input type="text" name="name">
  <input type="submit">
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
  // collect value of input field
  $name = $_REQUEST['name'];
  if (empty($name)) {
    echo "Name is empty";
  } else {
    echo $name;
  }
}
?>

</body>
</html>

In this example, when the user inputs their name and submits the form, the name is collected and displayed on the page.

Knowee AI · Accepted Answer

In PHP, there are three types of arrays:

Indexed arrays: An array with a numeric index where values are stored linearly.
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.
Multidimensional arrays: These are arrays that contain other arrays within them.

Now, let's discuss $_SESSION,$ _COOKIE, and $_REQUEST.

$_SESSION: This is a superglobal variable which is used to store information in a variable to be used across multiple pages. A session is started with the session_start() function. For example:

<?php
   session_start();
   $_SESSION["name"] = "StudyAssistant";
   echo 'Hello, ' . $_SESSION["name"];
?>

In this example, a session is started and a name is stored in the session variable. This name can now be accessed on any page that starts with session_start().

$_COOKIE: This is a superglobal variable which is used to store information on the user's computer. For example:

<?php
   setcookie("name", "StudyAssistant", time() + (86400 * 30), "/"); // 86400 = 1 day
   if(!isset($_COOKIE["name"])) {
     echo "Cookie named 'name' is not set!";
   } else {
     echo "Cookie 'name' is set!<br>";
     echo "Value is: " . $_COOKIE["name"];
   }
?>

In this example, a cookie named "name" is set to "StudyAssistant". The cookie is set to expire in one day.

$_REQUEST: This is a superglobal variable which is used to collect data after submitting an HTML form. For example:

<html>
<body>

<form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
  Name: <input type="text" name="name">
  <input type="submit">
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
  // collect value of input field
  $name = $_REQUEST['name'];
  if (empty($name)) {
    echo "Name is empty";
  } else {
    echo $name;
  }
}
?>

</body>
</html>

In this example, when the user inputs their name and submits the form, the name is collected and displayed on the page.

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

Question

Solution

Similar Questions

Upgrade your grade with Knowee