Set - 4

Question 11 :

What are the different functions in sorting an array? 

Answer :

Sorting functions in PHP:

asort()
arsort()
ksort()
krsort()
uksort()
sort()
natsort()
rsort()

 


Question 12 :

How can we know the count/number of elements of an array?

Answer :

2 ways:
a) sizeof($array) - This function is an alias of count()
b) count($urarray) - This function returns the number of elements in an array.
Interestingly if you just pass a simple var instead of an array, count() will return 1.


Question 13 :

How many ways we can pass the variable through the navigation between the pages?

Answer :

At least 3 ways: 
1. Put the variable into session in the first page, and get it back from session in the next page. 
2. Put the variable into cookie in the first page, and get it back from the cookie in the next page. 
3. Put the variable into a hidden form field, and get it back from the form in the next page.


Question 14 :

What is the maximum length of a table name, a database name, or a field name in MySQL?

Answer :

Database name: 64 characters
Table name: 64 characters
Column name: 64 characters


Question 15 :

How many values can the SET function of MySQL take?

Answer :

MySQL SET function can take zero or more values, but at the maximum it can take 64 values.