<?php for ($i = 0; $i < 3; $i++) { echo $i . ', '; } ?>
for loop iterates three times, printing the value of $i each time, followed by a comma and space.
Which PHP function is used to check if a file exists in PHP?
A). file_exists()
B). is_file()
C). exists()
D). check_file()
Which function is used to retrieve the value of a query string parameter in PHP?
A). $_GET[]
B). $_POST[]
C). $_SESSION[]
D). $_COOKIE[]
Which of the following statements is true about PHP's include and require functions?
A). include will only produce a warning if the file cannot be found, while require will produce an error
B). include will produce an error if the file cannot be found, while require will only produce a warning
C). Both include and require will produce an error if the file cannot be found
D). Both include and require will only produce a warning if the file cannot be found
Which PHP function is used to output content as HTML entities, preventing cross-site scripting (XSS) attacks?
A). htmlspecialchars()
B). htmlentities()
C). escape()
D). sanitize()
What does the $_POST superglobal array contain in PHP?
A). Data submitted via an HTML form using the POST method
B). Data submitted via an HTML form using the GET method
C). Data stored in cookies
D). Data stored in session variables
Which of the following PHP directives is used to set the maximum execution time of a script?
A). max_execution_time
B). memory_limit
C). error_reporting
D). display_errors
What is the purpose of the PHP phpinfo() function?
A). To display information about the PHP environment
B). To execute PHP code
C). To retrieve data from a database
D). To create a new PHP file
Which of the following PHP tags is deprecated and should be avoided?
A). script tag
B). <?php
C). <? ... ?>
D). <?php ... ?>
Which of the following statements is true about PHP variables?
A). Variable names are case-sensitive in PHP
B). PHP variables must start with a dollar sign ($)
C). Variable names cannot contain numbers
D). Variables in PHP cannot be reassigned
What is the output of the following code? <?php $a = 10; $b = 5; echo ($a > $b) ? 'Yes' : 'No'; ?>
A). Yes
B). No
C). 1
D). 0