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What’s the difference between __sleep and __wakeup?

  • __sleep serializes
  • __wakeup serializes
  • Both are the same
  • __wakeup unserializes
__sleep is called before an object is serialized, allowing you to define which data should be serialized. __wakeup is called after unserialization. Learn more: http://php.net/manual/en/language.oop5.magic.php
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What is a common use case for the $_REQUEST superglobal in PHP?

  • Retrieving form data submitted via both GET and POST methods.
  • Accessing session-related data.
  • Validating user input against a predefined list of values.
  • Storing and retrieving data from cookies.
A common use case for the $_REQUEST superglobal in PHP is to retrieve form data submitted via both GET and POST methods. When a form is submitted, the data is accessible through the $_REQUEST superglobal, regardless of the method used. This allows you to handle form submissions uniformly, regardless of whether the form used the GET or POST method. By accessing the appropriate keys within the $_REQUEST array, you can retrieve and process the form data. Learn more: https://www.php.net/manual/en/reserved.variables.request.php
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The filter_var() function is used to filter and validate data in PHP.

  • TRUE
  • FALSE
  • nan
  • nan
The filter_var() function in PHP is used to both filter and validate data. It offers a range of predefined filters to sanitize and validate different types of data, such as URLs, email addresses, numbers, and more. By applying appropriate filters, the filter_var() function ensures the integrity and security of the data. Refer to: http://php.net/manual/en/function.filter-var.php
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A constructor in a PHP class is defined using the __construct() method.

  • method
  • function
  • keyword
  • property
In PHP, a constructor in a class is defined using the __construct() method. The correct option is "method." The __construct() method is a special method that is automatically called when an object of the class is created. It is used to initialize the object's properties or perform any necessary setup tasks. For further details, refer to the PHP documentation on constructors: http://php.net/manual/en/language.oop5.decon.php
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In PHP, the ______ function is used to replace some characters in a string with some other characters.

  • str_replace()
  • replace()
  • substr_replace()
  • swap()
The str_replace() function in PHP is used to replace some characters in a string with some other characters. It performs a search and replace operation on a given string. It replaces all occurrences of the specified search string with the replacement string. Learn more: https://www.php.net/manual/en/function.str-replace.php
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In PHP, a function is defined with the function keyword, followed by a unique function name and a pair of _______ containing optional parameters.

  • braces
  • brackets
  • parentheses
  • curly brackets
The correct option is: "parentheses." In PHP, a function is defined using the function keyword, followed by the function name and a pair of parentheses. Within the parentheses, parameters can be defined to accept inputs for the function. Learn more: https://www.php.net/manual/en/functions.user-defined.php
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What function do you use in PHP to execute a query against a MySQL database?

  • mysqli_query()
  • mysql_query()
  • pdo_query()
  • execute_query()
In PHP, you can use the mysqli_query() function to execute a query against a MySQL database. This function takes two parameters: the connection object and the SQL query you want to execute. The SQL query can be any valid MySQL statement, such as SELECT, INSERT, UPDATE, or DELETE. The mysqli_query() function returns a result object for successful SELECT queries or a boolean value for other types of queries. It's important to use prepared statements or proper escaping techniques to prevent SQL injection vulnerabilities when executing user-supplied data as part of the query.
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A variable declared outside all functions in PHP is considered to have a ______ scope.

  • Local
  • Global
  • Static
  • Super
A variable declared outside all functions in PHP is considered to have a global scope. It means that the variable is accessible from anywhere in the PHP script, including inside functions. Global variables are defined outside of any function and can be accessed and modified throughout the entire script. However, it's generally recommended to use global variables sparingly and follow good programming practices to avoid potential issues related to variable scoping. Learn more: https://www.php.net/manual/en/language.variables.scope.php#language.variables.scope.global
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You have been asked to set up a local development environment for PHP. What steps would you take?

  • Install a text editor.
  • Install a software stack like WAMP (Windows), MAMP (macOS), or LAMP (Linux).
  • Create a new PHP file and save it with a .php extension in the web server's root directory.
  • All of the above.
Setting up a local development environment for PHP involves several steps. You would typically start by installing a text editor or IDE to write your PHP scripts. Then, you'd install a software stack like WAMP, MAMP, or LAMP, which includes a web server, a database system, and the PHP interpreter. Finally, you would create a new PHP file and save it in the web server's root directory. Learn more: https://www.php.net/manual/en/install.general.php
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How can you open a file in PHP?

  • open()
  • fopen()
  • read()
  • include()
In PHP, you can open a file using the fopen() function. This function takes the file path and mode as arguments and returns a file pointer that can be used for further file operations, such as reading or writing.
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