The document discusses various PHP functions, including count() for returning array lengths, and methods for handling both indexed and associative arrays. It also covers string functions such as strlen(), str_word_count(), strrev(), strpos(), and str_replace() for different string manipulations. Overall, it serves as a guide to using arrays and strings in PHP.

3. Get The Length of an Array - The count() Function
The count() function is used to return the length (the number of elements) of an array:

4. PHP Indexed Arrays

6. Loop Through an Indexed Array

7. PHP Associative Arrays

9. Loop Through an Associative Array

10. PHP Multidimensional Arrays

11. PHP - Two-dimensional Arrays

14. PHP String Functions
strlen() - Return the Length of a String

15. str_word_count() - Count Words in a String

16. strrev() - Reverse a String

17. strpos() - Search For a Text Within a String

18. str_replace() - Replace Text Within a String

19. Form