| Arithmetic operator: Division (/) |
7 years, 19 weeks and 16 hours |
| Arithmetic operator: Multiplication (*) |
7 years, 19 weeks and 16 hours |
| Arithmetic operator: Subtraction (-) |
7 years, 19 weeks and 16 hours |
| Arithmetic operator: Addition (+) |
7 years, 19 weeks and 16 hours |
| Case-insensitive constant name |
7 years, 19 weeks and 16 hours |
| Case-sensitive constant name |
7 years, 19 weeks and 16 hours |
| Replace text within a string - str_replace() |
7 years, 19 weeks and 16 hours |
| Search for a specific text within a string - strpos() |
7 years, 19 weeks and 16 hours |
| Reverse a string - strrev() |
7 years, 19 weeks and 16 hours |
| Count the number of words in a string - str_word_count() |
7 years, 19 weeks and 16 hours |
| Get the length of a string - strlen() |
7 years, 19 weeks and 16 hours |
| PHP NULL value |
7 years, 19 weeks and 16 hours |
| PHP object |
7 years, 19 weeks and 16 hours |
| Secret of Success In Business |
7 years, 19 weeks and 16 hours |
| PHP array |
7 years, 19 weeks and 16 hours |
