What PHP superglobal array holds the information about cookies?

$_COOKIE
$_REQUEST
$_SESSION
$_SERVER

The $_COOKIE superglobal array holds the information about cookies in PHP. It provides access to the values of cookies that have been sent in the HTTP request. For further information, refer to: http://php.net/manual/en/reserved.variables.cookies.php

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You are writing a PHP script and you need to open a file. How would you do this?

open()
fopen()
read()
include()

In PHP, to open a file in a script, you would use the fopen() function. It takes the path to the file and the mode as parameters. This function returns a file handle or pointer that can be used for file operations, such as reading or writing data.

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What are some common uses of the $_COOKIE superglobal array in PHP?

Retrieving stored user preferences
Tracking user sessions
Personalizing website content
All the options

The $_COOKIE superglobal array in PHP is commonly used for various purposes. It can be used to retrieve stored user preferences, implement remember me functionality, track user sessions, and personalize website content based on previously set cookies. It provides a way to store and retrieve data associated with the user's browsing session.

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You want to execute some code in your PHP script if a certain condition is not met. How would you do this using an else statement?

if ($condition) { ... } else { ... }
if ($condition) { ... }
if ($condition) { ... } elseif ($condition2) { ... } else { ... }
if ($condition) { ... } elseif ($condition2) { ... } endif;

To execute code if a certain condition is not met in PHP, you would use an else statement. The else statement is used in conjunction with an if statement and provides an alternative code block to be executed when the initial condition is false. If the condition of the if statement is true, the code block associated with the if statement will be executed. If the condition is false, the code block associated with the else statement will be executed instead. The else statement allows you to handle the "else" case when the initial condition is not met. Learn more: https://www.php.net/manual/en/control-structures.else.php

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What is the difference between $a != $b and $a !== $b?

$a != $b performs loose comparison, while $a !== $b performs strict comparison
$a != $b checks for value equality, while $a !== $b checks for value and type equality
There is no difference, both expressions perform the same comparison
$a != $b returns a boolean value, while $a !== $b returns an integer value

The $a != $b expression checks for value equality, while the $a !== $b expression checks for both value and type equality. The strict comparison (!==) ensures that the operands are of the same type. Learn more: http://php.net/manual/en/language.operators.comparison.php

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The filter_var() function with the FILTER_VALIDATE_INT filter is used to check if a variable is an integer in PHP.

TRUE
FALSE
nan
nan

The filter_var() function in PHP with the FILTER_VALIDATE_INT filter is indeed used to check if a variable is an integer. It validates whether the provided value is a valid integer and returns false if it's not, or the validated integer value if it is valid. The FILTER_VALIDATE_INT filter is a useful tool to perform integer validation in PHP. For more details, visit: http://php.net/manual/en/function.filter-var.php

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In PHP, to declare an array, you use the array() function or the [] ______.

syntax
operator
delimiter
symbol

In PHP, to declare an array, you can use the array() function or the [] operator, also known as the array shorthand syntax. The [] operator provides a concise way to define an array directly without invoking the array() function. Both forms are valid and interchangeable for declaring arrays in PHP. Learn more: https://www.php.net/manual/en/language.types.array.php#language.types.array.syntax

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A common use case for Form Handling in PHP is to ______.

Validate and process user input
Create visually appealing forms
Apply styles to form elements
Generate dynamic form elements

A common use case for Form Handling in PHP is to validate and process user input. When users submit a form, it's essential to validate the input data to ensure it meets the required criteria (e.g., checking for valid email addresses or password strength). PHP provides functions and techniques to validate and sanitize the form data, preventing security vulnerabilities and ensuring data integrity. Once validated, the form data can be further processed, such as storing it in a database, sending email notifications, or performing specific actions based on the user input. Form Handling in PHP allows developers to create robust and secure applications by effectively managing and responding to user-submitted data. Learn more: https://www.php.net/manual/en/tutorial.forms.php

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How do you use the $_GET superglobal in PHP?

Access the data using the $_GET['key'] syntax.
Access the data using the $_GET->$key syntax.
Access the data using the $_GET['key'] method.
Access the data using the $_GET->key method.

To use the $_GET superglobal in PHP, you can access the data sent in the URL's query string using the $_GET['key'] syntax, where 'key' represents the name of the parameter in the query string. For example, if the URL is "example.com/page.php?name=John", you can access the value "John" by using $_GET['name']. This allows you to retrieve and process data passed through the URL using the GET method. Learn more: https://www.php.net/manual/en/reserved.variables.get.php

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You are writing a PHP script and you need to execute some code only if a certain condition is met. How would you do this using an if statement?

if ($condition) { ... }
if ($condition) { ... } else { ... }
if ($condition) { ... } elseif ($condition2) { ... } else { ... }
if ($condition) { ... } elseif ($condition2) { ... } endif;

To execute code only if a certain condition is met in PHP, you would use an if statement. The if statement starts with the keyword "if" followed by the condition to be evaluated within parentheses. If the condition is true, the code block associated with the if statement will be executed. If the condition is false, the code block will be skipped. The if statement allows you to selectively execute code based on the result of the condition. Learn more: https://www.php.net/manual/en/control-structures.if.php

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