PHP intermediate quiz quiz

Intermediate PHP quiz that cover common issues and solutions in PHP programming

This quiz is in PHP quiz collection.

1.
Which of the following is correct about preg_match() function?
2.
Which of the following method can be used to create a MySql database using PHP?
3.
Which of the following type of variables are sequences of characters, like 'PHP supports string operations.'?
4.
Which of the following is used to declare a constant?

What will be printed?

$var = '0';
if ($var) {
    echo 'true';
} else {
    echo 'false';
}

How do we access the value of 'd' later?

$a = array(
    'a',
    3 => 'b',
    1 => 'c',
    'd'
);

What will be printed?

$a = array();
if ($a == null) { 
  echo 'true';
} else {
  echo 'false';
}

What will be printed?

if (null === false) {
  echo 'true';
} else {
  echo 'false';
}

10.
What will be the value of $var below?
```
$var = true ? '1' : false ? '2' : '3';
```

11.

What will be printed?

if ('2' == '02') {   
  echo 'true';
} else {
  echo 'false';
}

12.

What will be printed?

$a = array(
  null => 'a',
  true => 'b',
  false => 'c',
  0 => 'd',
  1 => 'e',
  '' => 'f'
);
echo count($a), "\n";

13.
In PHP you can use both single quotes ( ' ' ) and double quotes ( " " ) for strings:
14.
Which of the following function creates an array?
15.
Which of the following method of Exception class returns array of the backtrace?

QuizBucket