Variables declared inside a function in PHP have a local scope. This means they are only accessible within that specific function. Once the function execution ends, the local variables are destroyed and cannot be accessed from outside the function. In order to access variables across different scopes, you would need to use return statements or pass them as parameters. Learn more: https://www.php.net/manual/en/language.variables.scope.php

Both the filter_input_array() and filter_var_array() functions in PHP are commonly used for sanitizing user input, validating form submissions, and filtering data from external sources. These functions provide a convenient way to apply filters to multiple inputs at once. Learn more at: http://php.net/manual/en/function.filter-input-array.php and http://php.net/manual/en/function.filter-var-array.php

In an associative array in PHP, the keys are provided explicitly by the programmer. When declaring an associative array, you define the keys and their corresponding values. Each key-value pair is defined within the array, allowing you to associate specific values with specific keys. The keys can be strings or integers, and they provide a convenient way to retrieve the corresponding values using the associated keys. Learn more: https://www.php.net/manual/en/language.types.array.php#language.types.array.syntax

In PHP, the while loop tests the condition before executing the block of code. The condition is evaluated at the beginning of each iteration. If the condition evaluates to true, the block of code is executed. If the condition evaluates to false, the loop is terminated, and the execution continues with the code following the loop. The while loop is used when you want to repeat a block of code based on a specific condition. It ensures that the code is executed only if the condition is true. Learn more: https://www.php.net/manual/en/control-structures.while.php

In PHP, you can destroy a session by using the session_destroy() function. This function removes all session data and ends the current session. Additionally, you may need to call session_unset() to unset all session variables before calling session_destroy(). This combination ensures the complete destruction of the session. To learn more, check: http://php.net/manual/en/function.session-destroy.php

The statement is incorrect. The do...while loop in PHP executes the block of code at least once, and then checks the condition. If the condition is true, the loop continues to execute the block of code again. If the condition is false, the loop terminates. Unlike other loops, the do...while loop checks the condition after executing the block of code, ensuring that the code block executes at least once. Learn more: https://www.php.net/manual/en/control-structures.do.while.php

True. In PHP, it is possible to have an array of arrays. This is known as a multidimensional array or a nested array. Each element in the outer array can be an array itself, allowing for the creation of complex data structures. This can be useful for organizing and accessing related data in a hierarchical manner. It provides flexibility when dealing with data that requires multiple levels of grouping. Learn more: https://www.php.net/manual/en/language.types.array.php

The file_put_contents() function in PHP is used to write data to a file. It takes the file name and the data to be written as parameters and writes the data to the specified file. This function is a convenient way to write data to a file without explicitly opening and closing the file handles. Learn more: http://php.net/manual/en/function.file-put-contents.php

To store a collection of items that can be accessed by a unique key for each item, you would use an associative array in PHP. An associative array allows you to assign specific keys to each item, creating a mapping between the keys and the corresponding values. Each key-value pair represents an item in the collection, and the unique keys provide a convenient way to access and manipulate the associated values. Associative arrays are commonly used when you need to organize data based on unique identifiers or labels. Learn more: https://www.php.net/manual/en/language.types.array.php#language.types.array.syntax

PHP was originally created by Rasmus Lerdorf in 1994. It started as a simple set of Common Gateway Interface (CGI) binaries written in the C programming language. Learn more: https://www.php.net/manual/en/history.php.php