Quiz 5
1. Which function replaces text within a string?
2. Which of these is NOT a valid PHP data type?
3. Which operator is used for 'concatenation assignment'?
4. Do PHP constants start with a dollar sign ($)?
5. Which operator is the logical 'AND'?
6. Which operator is the logical 'OR'?
7. Which operator is used for 'not equal'?
8. How do you get the current date in PHP?
9. Which function removes whitespace from the beginning and end of a string?
10. Which function checks if a variable is defined?
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