Which class of HTTP status codes is used for server error conditions?

Which sentence describes the following regular expression match?

preg_match('/^\d+(?:\.[0-9]+)?$/', $test);

Which of these databases is NOT supported by a PDO driver?

What is the output of the following code?

for ($i = 0; $i < 1.02; $i += 0.17) {

$a[$i] = $i;

}

echo count($a);

Which of the following rules must every correct XML document adhere to? (Choose 2)

Given a php.ini setting of

default_charset = utf-8

what will the following code print in the browser?

header('Content-Type: text/html; charset=iso-8859-1');

echo ' & #9986; & #10004; & #10013;';

You need to escape special characters to use user input inside a regular expression. Which functions would you use? (Choose 2)

Given the following code, what will the output be:

trait MyTrait {

private $abc = 1;

public function increment() {

$this- > abc++;

}

public function getValue() {

return $this- > abc;

}

}

class MyClass {

use MyTrait;

public function incrementBy2() {

$this- > increment();

$this- > abc++;

}

}

$c = new MyClass;

$c- > incrementBy2();

var_dump($c- > getValue());

The following form is loaded in a recent browser and submitted, with the second select option selected:

< form method="post" >

< select name="list" >

< option > one < /option >

< option > two < /option >

< option > three < /option >

< /select >

< /form >

In the server-side PHP code to deal with the form data, what is the value of $_POST['list'] ?

What is the return value of the following code: substr_compare("foobar", "bar", 3);