PHP Intermediate Quiz 1
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Quiz 1
1. Which superglobal variable is used to get the filename of the current script?
$_SERVER['SCRIPT_NAME']
$_SERVER['PHP_SELF']
$_SERVER['REMOTE_ADDR']
2. Which function checks if a variable is 'empty' (e.g., 0, '', or NULL)?
empty()
is_null()
isset()
3. What is a requirement for the header() function to work correctly?
It must be inside the <body> tag
It only works with cookies
It must be sent before any output
4. Which function converts special characters to HTML entities?
strip_tags()
htmlspecialchars()
urlencode()
5. How do you destroy a single session variable named 'user'?
unset($_SESSION['user']);
session_destroy('user');
$_SESSION['user'] = NULL;
6. Which superglobal stores data about uploaded files?
$_POST
$_FILES
$_UPLOAD
7. What is the best way to validate an email address in PHP?
Using strlen()
Using strpos()
filter_var($email, FILTER_VALIDATE_EMAIL)
8. What is the default scope of a variable declared inside a function?
Local
Global
Static
9. Which keyword is used to keep a variable's value after a function finishes?
persistent
static
global
10. Which function splits a string into an array?
split_string()
implode()
explode()
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