Interview Questions for PHP - 5 - Answers

Back- Interview Questions -5

Q1. I am trying to assign a variable the value of 0123, but it keeps coming up with a different number, what’s the problem?
Ans: PHP Interpreter treats numbers beginning with 0 as octal. 

Q2. Would I use print "$a dollars" or "{$a} dollars" to print out the amount of dollars in this example?
Ans: In this example it wouldn’t matter, since the variable is all by itself, but if you were to print something like "{$a},000,000 mln dollars", then you definitely need to use the braces.

Q3. How do I find out the number of parameters passed into function?
Ans: func_num_args() function returns the number of parameters passed in.

Q4. Explain the ternary conditional operator in PHP?
Ans: Expression preceding the ? is evaluated, if it’s true, then the expression preceding the : is executed, otherwise, the expression following : is executed.

Q5. When are you supposed to use endif to end the conditional statement?
Ans: When the original if was followed by : and then the code block without braces.