Zend Preparation | PHP Quiz (Learning Mode)

PHP Basics Learning Mode

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You work as a Web Developer for Remote Inc. What will be the output when you try to run the script below?

<?php
    $b = false;
    if($b = true)
      print("true");
    else
      print("false");
?>

false

true

The script will throw an error message.

true false

Explanation:
The only legal expression in an if statement is a boolean expression or an expression that results in a boolean variable. In the above example, the value true is assigned to the variable x. The result of any assignment expression is the value of the variable following the assignment; hence, "true" will be the output.

The if-else statement is a conditional statement. It is used to execute a statement or group of statements based on some condition.

The general format of the statement is given below:

if(boolean_expression){
 statements;
 }
 else
 {
 statements;
 }

The else clause is optional.

Example:

$x = 10;
if($x > 100)
 echo $x." is greater than 100";
else if($x > 50)
 echo $x." is greater than 50 but less than 100";
else
 echo $x." is less than 50";

Answer options A, D, and C are incorrect. The given script runs successfully and displays true as output