PHP Test
1. What is the best practice for running MySQL queries in PHP?
Consider the risk of SQL injection.
Answers:
1. Use mysql_query() and variables: for example: $input =
$_POST[‘user_input’]; mysql_query(“INSERT INTO table (column)
VALUES (‘” . $input . “‘)”);
2. Use PDO...
1. What is the best practice for running MySQL queries in PHP?
Consider the risk of SQL injection.
Answers:
1. Use mysql_query() and variables: for example: $input =
$_POST[‘user_input’]; mysql_query(“INSERT INTO table (column)
VALUES (‘” . $input . “‘)”);
2. Use PDO prepared statements and parameterized queries: for
example: $input= $_POST[“user-input”] $stmt = $pdo-
>prepare(‘INSERT INTO table (column) VALUES (“:input”); $stmt-
>execute(array(‘:input’ => $input));
3. Use mysql_query() and string escaped variables: for example:
$input= $_POST[“user-input”] $input_safe =
mysql_real_escape_string($input); mysql_query(“INSERT INTO
table (column) VALUES (‘” . $input. “‘)”);
4. Use mysql_query() and variables with a blacklisting check: for
example: $blacklist = array(“DROP”,”INSERT”,”DELETE”);
$input= $_POST[“user-input”] if (!$array_search($blacklist)))
mysql_query(“INSERT INTO table (column) VALUES (‘” . $input.
“‘)”);
2. Which of the following methods should be used for sending
an email using the variables $to, $subject, and $body?
Answers:
1. mail($to,$subject,$body)
2. sendmail($to,$subject,$body)
3. mail(to,subject,body)
4. sendmail(to,subject,body)
3. Which of the following is used to maintain the value of a
variable over different pages?
,Answers:
1. static
2. global
3. session_register()
4. None of these
4. Which of the following will check if a function exists?
Answers:
1. function_exists()
2. has_function()
3. $a = “function to check”; if ($a ()) // then function exists
4. None of these
5. Which of the following is not a file-related function in PHP?
Answers:
1. fclose
2. fopen
3. fwrite
4. fgets
5. fappend
6.Which of the following is true about the singleton design
pattern?
Answers:
1. A singleton pattern means that a class will only have a single
method.
, 2. A singleton pattern means that a class can have only one
instance object.
3. A singleton pattern means that a class has only a single member
variable.
4. Singletons cannot be implemented in PHP.
7. Which of the following characters are taken care of by
htmlspecialchars?
Answers:
1. <
2. >
3. single quote
4. double quote
5. &
6. All of these
8. Which of the following will read an object into an array
variable?
Answers:
1. $array_variable = get_object_vars($object);
2. $array_variable = (array)$object;
3. $array_variable = array $object;
4. $array_variable = get_object_vars $object;
9. Which of the following variable declarations within a class is
invalid in PHP?
Answers:
, 1. private $type = ‘moderate’;
2. internal $term = 3;
3. public $amnt = ‘500’;
4. protected $name = ‘Quantas Private Limited’;
10. Which of the following is not a PHP magic constant?
Answers:
1. __FUNCTION__
2. __TIME__
3. __FILE__
4. __NAMESPACE__
5. __CLASS__
11. Which of the following will print out the PHP call stack?
Answers:
1. $e = new Exception; var_dump($e->debug());
2. $e = new Exception; var_dump($e->getTraceAsString());
3. $e = new Exception; var_dump($e->backtrace());
4. $e = new Exception; var_dump($e->getString());
12. What will be the output of the following code?
<?php
var_dump (3*4);
?>
Answers:
1. int(3*4)
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