Answer Posted / -=pkg=-

1. If a method can be static, declare it static. Speed
improvement is by a factor of 4.

2. Avoid magic like __get, __set, __autoload

3. require_once() is expensive

4. Use full paths in includes and requires, less time spent
on resolving the OS paths.

5. If you need to find out the time when the script started
executing, $_SERVER[’REQUEST_TIME’] is preferred to time()

6. See if you can use strncasecmp, strpbrk and stripos
instead of regex

7. str_replace is faster than preg_replace, but strtr is
faster than str_replace by a factor of 4

8. If the function, such as string replacement function,
accepts both arrays and single characters as arguments, and
if your argument list is not too long, consider writing a
few redundant replacement statements, passing one character
at a time, instead of one line of code that accepts arrays
as search and replace arguments.

9. Error suppression with @ is very slow.

10. $row[’id’] is 7 times faster than $row[id]

11. Error messages are expensive

12. Do not use functions inside of for loop, such as for
($x=0; $x < count($array); $x) The count() function gets
called each time.

What is difference between include,require,include_once and require_once()?

1063

---

What are the common uses of php?

1100

---

What is difference between array_merge and array_combine?

1069

---

What is the default time in seconds for which session data is considered valid?

1123

---

Can you give example for trait in php?

1006

---

How to add comments in php?

1000

---

What are php parameters?

1006

---

What is difference between required and include in php?

944

---

How to repeat a string to a specific number of times in php?

978

---

What is str_replace()?

1021

---

Tell me how is it possible to propagate a session id?

1039

---

Which php framework is in demand?

909

---

What does $_server means?

1003

---

Can I use php in html?

981

---

Tell me what the difference between the 'bitwise and' operator and the 'logical and' operator?

962

---