Set - 4

Question 1 :

How can we create a database using PHP and mysql? 

Answer :

We can create MySQL database with the use of mysql_create_db($databaseName) to create a database.


Question 2 :

How many ways we can retrieve the date in result set of mysql using php? 

Answer :

As individual objects so single record or as a set or arrays.


Question 3 :

Can we use include ("abc.php") two times in a php page "makeit.php"?

Answer :

Yes


Question 4 :

For printing out strings, there are echo, print and printf. Explain the differences?

Answer :

echo is the most primitive of them, and just outputs the contents following the construct to the screen. print is also a construct (so parentheses are optional when calling it), but it returns TRUE on successful output and FALSE if it was unable to print out the string. However, you can pass multiple parameters to echo, like:

echo 'Welcome ', 'to', ' ', 'techpreparations!';

and it will output the string "Welcome to techpreparations!" print does not take multiple parameters. It is also generally argued that echo is faster, but usually the speed advantage is negligible, and might not be there for future versions of PHP. printf is a function, not a construct, and allows such advantages as formatted output, but it's the slowest way to print out data out of echo, print and printf.


Question 5 :

I am writing an application in PHP that outputs a printable version of driving directions. It contains some long sentences, and I am a neat freak, and would like to make sure that no line exceeds 50 characters. How do I accomplish that with PHP? 

Answer :

On large strings that need to be formatted according to some length specifications, use wordwrap() or chunk_split().