Question

Take the following HTML form.

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<form id="form" name="form" method="post">
<input type="text" name="number" value="0" />
<input type="submit" />
</form>

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

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

Question

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

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// Loop 1 - while
$count = 0;
 
while ($count < 0) {
    ++$count;
}

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// Loop 2 - do while
$count = 0;
 
do {
    ++$count;
} while  ($count < 0);

Question

What does the following code do?

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

Question

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

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// 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.

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

Question

The following code was executed.

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<?php
class MyClass {
  private $foo = "bar";
}
 
$myObject = new MyClass();
echo $myObject;

Which produced the following error.

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Catchable fatal error: Object of class MyClass could not be converted to string in test.php on line 7
 
Call Stack:
    0.0011     323736   1. {main}() /test.php:0

How can the code be simply changed to prevent this error and produce some form of result?