Operators And Expressions In Php - Study Mode
[#66] What will be the output of the following PHP code ? <?php $color1 = "red"
$color2 = "1"
echo "$color1" + "$color2"
?>
Correct Answer
(D) 1
Explanation
Solution: + just returns the numeric value even though it is inside double quotes.
[#67] What will be the output of the following PHP code ? <?php $color1 = "1"
$color2 = "1"
echo "$color1" + "$color2"
?>
Correct Answer
(B) 2
Explanation
Solution: + can be used to add to integer values which are enclosed by double-quotes.
[#68] What will be the output of the following PHP code ? <?php $color1 = "red"
$color2 = "1"
$color3 = "grey" echo "$color1" + "$color2" . "$color3"
?>
Correct Answer
(A) 1grey
Explanation
Solution: + gives the value 1 and . is used to give join 1 and grey.
[#69] What will be the output of the following PHP code ? <?php echo "This" , "was" , "a" , "bad" , "idea"
?>
Correct Answer
(C) Thiswasabadidea
Explanation
Solution: In an echo statement the comma operator is used to join strings.
[#70] What will be the output of the following PHP code ? <?php echo "This" . "was" . "a" . "bad" . "idea"
?>
Correct Answer
(C) Thiswasabadidea
Explanation
Solution: In an echo statement the dot operator is used to join strings.