Answer Posted / ramesh

1. echo();
2. date();
3. isset();
4. array();
5. in_array();
6. mail();
7. empty();
8. md5();32 chars hash
9. sha1(); 40 chars hash
10. strlen();
11. addslashes();
12. stripslashes();
13. trim();
14. ucfirst();
15. ucwords();
16. ceil(); round fractions up;
17. floor(); round fractions down
18. rand(); generates a random number
19. round(); rounds a float
20. count(); count elements in a variable
21. strtolower();
22. strtoupper();
23. copy();
24. chmod();
25. move_uploaded_file();

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