Skip to main content

14 quizzes found.

What is the best way to iterate and modify every element of an array using PHP 5?

  1. You cannot modify an array during iteration
  2. for($i = 0; $i < count($array); $i++) { /* ... */ }
  3. foreach($array as $key => &$val) { /* ... */ }
  4. foreach($array as $key => $val) { /* ... */ }
  5. while(list($key, $val) = each($array)) { /* ... */}

Choose 1 answers

What combination of boolean values for $a, $b, $c, and $d will result in the variable $number being equal to 3?

<?php$a = null;$b = null;$c = null;$d = null;if($a && !$b) { if(!!$c && !$d) { if($d && ($a || $c)) { if(!$d && $b) { $number = 1; } else { $number = 2; } } else { $number = 3; } } else { $number = 4; }} else { $number = 5;}?>
  1. false, true, true, true
  2. true, false, true, false
  3. true, true, false, false
  4. false, true, true, false
  5. false, false, true, false

Choose 1 answers

The ____ operator is used to test if two values are identical in every way.

  1. !==
  2. instanceof
  3. =
  4. ==
  5. ===

Choose 1 answers

Which of the following comparisons will evaluate to true?

  1. 't' == t
  2. 1 === "1time"
  3. "top" == 0
  4. "top" === 0
  5. 1 == "1time"

Choose 3 answers

Identify the best approach to compare to variables in a binary-safe fashion

  1. Both strcmp() and $a === $b
  2. $a == $b
  3. $a === $b
  4. str_compare()
  5. strstr()

Choose 1 answers