PHP

Question: Which of the following are valid PHP variables?
A
@$foo

B
&$variable

C
${0x0}

D
$variable

E
$0x0

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Question: What is the best way to iterate and modify every element of an array using PHP 5?
A
You cannot modify an array during iteration

B
for($i = 0; $i < count($array); $i++) { /* ... */ }

C
foreach($array as $key => &$val) { /* ... */ }

D
foreach($array as $key => $val) { /* ... */ }

E
while(list($key, $val) = each($array)) { /* ... */

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Question: What is the output of the following PHP code? <?php define('FOO', 10); $array = array(10 => FOO, "FOO" => 20); print $array[$array[FOO]] * $array["FOO"]; ?>
A
FOO

B
100

C
200

D
20

E
10

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Question: What is the output of the following PHP script? <?php $a = 1; $b = 2.5; $c = 0xFF; $d = $b + $c; $e = $d * $b; $f = ($d + $e) % $a; print ($f + $e); ?>
A
643.75

B
432

C
643

D
257

E
432.75

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Question: 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; } ?>
A
false, true, true, true

B
true, false, true, false

C
true, true, false, false<

D
false, true, true, false

E
false, false, true, false

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Question: <?php $string = "111221"; for($i = 0; $i < strlen($string); $i++) { $current = $string[$i]; $count = 1; while(isset($string[$i + $count]) && ($string[$i + $count] == $current)) $count++; $newstring .= "$count{$current}"; $i += $count-1; } print $newstring; ?>
A
312211

B
3312212

C
11221221

D
221131

E
3211122

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Question: What is the best way to ensure that a user-defined function is always passed an object as its single parameter?
A
function myfunction(stdClass $a)

B
function myfunciton($a = stdClass)

C
Use is_object() within the function

D
There is no way to ensure the parameter will be an object

E
<label for="10_5">function myfunction(Object $a)</label>

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Question: What does the following function do, when passed two integer values for $p and $q?
<?php function magic($p, $q) { return ($q == 0)?$p:magic($q, $p % $q); } ?>
A
Loops infinitely

B
Switches the values of $p and $q

C
Determines if they are both even or odd

D
Determines the greatest common divisor between them

E
Calculates the modulus between the two

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Question: ______ operator is used to test if two values are identical in every way.
A
!==

B
instanceof

C
=

D
==

E
===

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Question: What would go in place of ?????? below to make this script execute without a fatal error? <?php $a = 1; $b = 0; ?????? $c = $a / $b; ?>
A
quit();

B
die();

C
stop();

D
__halt_compiler();

E
exit();

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Question: Which of the following are valid PHP variables?

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

Question: What is the output of the following PHP code? <?php define('FOO', 10); $array = array(10 => FOO, "FOO" => 20); print $array[$array[FOO]] * $array["FOO"]; ?>

Question: What is the output of the following PHP script? <?php $a = 1; $b = 2.5; $c = 0xFF; $d = $b + $c; $e = $d * $b; $f = ($d + $e) % $a; print ($f + $e); ?>

Question: <?php $string = "111221"; for($i = 0; $i < strlen($string); $i++) { $current = $string[$i]; $count = 1; while(isset($string[$i + $count]) && ($string[$i + $count] == $current)) $count++; $newstring .= "$count{$current}"; $i += $count-1; } print $newstring; ?>

Question: What is the best way to ensure that a user-defined function is always passed an object as its single parameter?

Question: What does the following function do, when passed two integer values for $p and $q?
<?php function magic($p, $q) { return ($q == 0)?$p:magic($q, $p % $q); } ?>

Question: `______` operator is used to test if two values are identical in every way.

Question: What would go in place of ?????? below to make this script execute without a fatal error? <?php $a = 1; $b = 0; ?????? $c = $a / $b; ?>

Question: Which of the following are valid PHP variables?

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

Question: What is the output of the following PHP code? <?php define('FOO', 10); $array = array(10 => FOO, "FOO" => 20); print $array[$array[FOO]] * $array["FOO"]; ?>

Question: What is the output of the following PHP script? <?php $a = 1; $b = 2.5; $c = 0xFF; $d = $b + $c; $e = $d * $b; $f = ($d + $e) % $a; print ($f + $e); ?>

Question: <?php $string = "111221"; for($i = 0; $i < strlen($string); $i++) { $current = $string[$i]; $count = 1; while(isset($string[$i + $count]) && ($string[$i + $count] == $current)) $count++; $newstring .= "$count{$current}"; $i += $count-1; } print $newstring; ?>

Question: What is the best way to ensure that a user-defined function is always passed an object as its single parameter?

Question: What does the following function do, when passed two integer values for $p and $q?<?php function magic($p, $q) { return ($q == 0)?$p:magic($q, $p % $q); } ?>

Question: ______ operator is used to test if two values are identical in every way.

Question: What would go in place of ?????? below to make this script execute without a fatal error? <?php $a = 1; $b = 0; ?????? $c = $a / $b; ?>

Question: What does the following function do, when passed two integer values for $p and $q?
<?php function magic($p, $q) { return ($q == 0)?$p:magic($q, $p % $q); } ?>

Question: `______` operator is used to test if two values are identical in every way.