What is the purpose of adding a lowercase "u" as a modifier after the final delimiter in a Perl-compatible regular expression?

Which code snippet uses the correct syntax for creating an instance of the Pet class?

Which is the correct format for adding a comment to a PHP script?

PHP supports multiple types of loops. If you wanted to loop through a block of code if and as long a specified condition is true, which type of loop would you use?

The ignore_user_abort( ) function sets whether a client disconnect should abort a script execution. In what scenario would you, as a web developer, use this function?

How might you troubleshoot a "call to undefined function" error?

Correct way to add comments to PHP?

Which keyword refers to properties or methods within the class itself?

What type of statements tell your PHP script to execute a section of code only if certain criteria are met?

Which datatypes are treated as arrays in some cases?