What does the use of the final keyword in a method declaration prevent?

PHP's echo and print functions are not exactly alike. Which will accept multiple parameters and concatenate them in its 'without parentheses' form?

Function to simplify searches in databases where you know the pronunciation but not the spelling

Choose the correct output of:

Which is NOT true for PHP constants?

Which mode parameter should be used with the fopen() function to open a file and point to the end for writing only?

How do you erase an element from an array, with numeric keys, to maintain a normalized integer series?

Which function is used to destroy a variable or object?

Which functions output text?

A file needs to be opened in a PHP application. Additionally, the application has to issue a warning and continue execution, in case the file is not found. The ideal function to use is:

Which is correct with regard to echo and print?