PHP Questions

Question

Take the following HTML form.

What is the output of the following PHP code after the above form has been submitted, and why?

if ($_POST['number'] === 0) {
	echo 'number is zero';
} else {
	echo 'number is not zero';
}

Question

What does the following code do?

Question

What is the difference between these two lines of code and can you produce the background code used for them?

// Line 1
$MyClass->MyMethod();
 
// Line 2
MyClass::MyMethod();

Question

Write a PHP script that will print out the following text in the correct diamond shape.

    *
   ***
  *****
 *******
*********
*********
 *******
  *****
   ***
    *

Question

The following code was executed.

Question

What does the following snippet print and why?

value++;
}
 
$a = new MyClass();
$a->value = 1;
doSomething($a);
 
print $a->value;

Question

Given the following form:

How would you get hold of the value of the input box after the form is submitted?

Question

Consider the following:

function doSomething(&$val) {
    $val++;
}
 
$a = 1;
doSomething($a);

What does the variable $a now equal?