PHP Questions

PHP Question: Post Variables

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';
}

philipnorton42 Fri, 07/29/2011 - 17:10

PHP Question: While And Do While Looping

What does the $count variable equal after each of these loops?

What does the following code do?

define("MY_CONSTANT", array(1,2,3,4,5));

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();

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

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

The following code was executed.

What does the following snippet print and why?

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

PHP Question: Form Variables

Given the following form:

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

philipnorton42 Fri, 04/22/2011 - 15:27

Consider the following:

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

What does the variable $a now equal?

What does the following code snipped print?

$a = 5;
$b = 'a';
print $$b;