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You need to filter and validate multiple inputs in your PHP script. How would you do this?

  • Use the appropriate filters and validation rules with the filter_input_array() function
  • Use the appropriate filters and validation rules with the filter_var_array() function
  • Implement custom validation logic in a loop with filter_input() or filter_var() functions
  • All of the above
To filter and validate multiple inputs in a PHP script, you can use the appropriate filters and validation rules with either the filter_input_array() function or the filter_var_array() function. Alternatively, you can implement custom validation logic in a loop using the filter_input() or filter_var() functions. All of the mentioned options are valid approaches to filter and validate multiple inputs in PHP. For more details, refer to the PHP documentation on filter_input_array() (http://php.net/manual/en/function.filter-input-array.php) and filter_var_array() (http://php.net/manual/en/function.filter-var-array.php).
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You need to execute a block of code in your PHP script for a known number of times. Why might you choose a for loop over a while loop or a do...while loop?

  • It provides a concise way to handle situations where you know the exact number of iterations in advance
  • It allows for flexible termination conditions based on complex logic
  • It ensures that the code block is executed at least once
  • It simplifies the handling of arrays and their elements
If you need to execute a block of code for a known number of times in PHP, a for loop is a suitable choice. A for loop provides a concise and structured way to handle situations where you know the exact number of iterations in advance. It allows you to initialize a counter variable, set the termination condition, and update the counter after each iteration. This provides a clear and predictable control flow for the loop. While loops and do...while loops are better suited for scenarios where the number of iterations is not predetermined or when you need to ensure that the code block is executed at least once. Learn more: https://www.php.net/manual/en/control-structures.for.php
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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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