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';
}

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.

PHP Question: Print Object

The following code was executed.

philipnorton42 Thu, 04/28/2011 - 11:29

What does the following snippet print and why?

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

Given the following form:

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

PHP Question: Pass By Reference

Consider the following:

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

What does the variable $a now equal?

philipnorton42 Tue, 04/19/2011 - 12:47

What does the following code snipped print?

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