In PHP, you can include a file using the require() statement, which includes and evaluates the specified file during runtime. This allows you to reuse code from other files in your current PHP script.

The correct option is 4. Indexed arrays in PHP have several common uses, including storing a collection of user input values, tracking session data for multiple users, and iterating over a list of items. Indexed arrays provide a convenient way to store and retrieve multiple values sequentially. They are often used when the order of elements and easy access by position are important. Learn more: https://www.php.net/manual/en/language.types.array.php#language.types.array.syntax

The correct option is: "Resuming the next iteration of a loop." In PHP, the continue statement is used to skip the remaining code in the current iteration of a loop and move on to the next iteration. It is commonly used when you want to skip certain iterations based on a condition. Learn more: https://www.php.net/manual/en/control-structures.continue.php

All of the given options are valid ways to access a global variable inside a function in PHP. You can use the global keyword followed by the variable name inside the function to indicate that you want to work with the global variable. Alternatively, you can pass the global variable as a parameter to the function. Additionally, global variables can be accessed directly from within the function without any special keyword or parameter passing. Learn more: https://www.php.net/manual/en/language.variables.scope.php#language.variables.scope.global

To encode a PHP array into a JSON object, you can use the json_encode() function. It converts a PHP value (such as an array) into its JSON representation. The other mentioned options (json_serialize(), json_convert()) are not valid PHP functions for encoding an array into a JSON object. For further details, refer to the PHP documentation on json_encode(): http://php.net/manual/en/function.json-encode.php

The strftime() function can be used to format a date and time according to a specified format string. For more information, refer to: http://php.net/manual/en/function.strftime.php

To create a MySQL table using PHP, you would use the mysqli_query function to execute a CREATE TABLE query. The SQL query would be "CREATE TABLE table_name (column1 datatype1, column2 datatype2, ...)" where "table_name" is the name of the table you want to create, and "column1", "column2", and so on are the column names and datatypes. The mysqli_query function takes two parameters: the connection object ($conn) and the SQL query. The function executes the query against the connected MySQL database. Make sure you have a successful connection established and the desired database selected before executing the query.

An interface in PHP OOP is indeed a contract that specifies what methods a class must implement. It establishes a set of rules or a contract that a class must adhere to when implementing the interface. The interface defines the method signatures that the implementing class must provide an implementation for. By implementing the interface, the class ensures that it fulfills the requirements and guarantees the expected behavior. Interfaces allow for polymorphism and provide a way to define a common interface that multiple classes can adhere to. To learn more, visit: http://php.net/manual/en/language.oop5.interfaces.php

In PHP, you can use the simplexml_load_string() function to load an XML document from a string into a SimpleXML object or use the simplexml_load_file() function to load an XML document from a file. These functions allow you to parse XML and access its elements, attributes, and values using a simple and intuitive syntax. The resulting SimpleXML object can be used to traverse and manipulate the XML structure within your PHP code. The libxml extension provides a convenient way to work with XML data in PHP applications.

The time() function in PHP is commonly used to get the current Unix timestamp, which represents the number of seconds elapsed since January 1, 1970 (Unix epoch time).

The fwrite() function in PHP is used to write content to a file. It takes the file handle obtained from fopen() as the first argument and the content to be written as the second argument. This function returns the number of bytes written or false on failure. It is commonly used to write data to files in PHP.

In PHP, the fopen() function is used to open a file. 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.