Can we use include ("xyz.PHP") two times in a PHP page "index.PHP"?

Correct Answer: htaccess is a configuration file running on Apache serverThese htaccess file used to change the functionality and features of apache web server eg htaccess file used for url rewrite htaccess file used to make the site password protected htaccess file can restrict some ip addresses ,so that on restricted ip adresses site will not open

Correct Answer: array_flip exchange the keys with their associated values in array ie Keys becomes values and values becomes keys "php","course2"=>"html"); $new_array = array_flip($arrayName); print_r($new_array); ?> OUTPUT : Array ( [php] => course1 [html] => course2 )

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Correct Answer: htmlspecialchars only takes care of , single quote ?, double quote " and ampersand htmlentities translates all occurrences of character sequences that have different meaning in HTML

Correct Answer: - echo is the most primitive of them, and just outputs the contents following the construct to the screen print is also a construct (so parentheses are optional when calling it), but it returns TRUE on successful output and FALSE if it was unable to print out the string However, you can pass multiple parameters to echo, like: and it will output the string "Welcome to TechInterviews!" print does not take multiple parameters It is also generally argued that echo is faster, but usually the speed advantage is negligible, and might not be there for future versions of PHP printf is a function, not a construct, and allows such advantages as formatted output, but it?s the slowest way to print out data out of echo, print and printf

Correct Answer: By using $_SERVER['HTTP_USER_AGENT'] variable

Correct Answer: By default the maximum size is 2MB and we can change the following setup at phpiniupload_max_filesize = 2M

Correct Answer: $result = mysql_query($sql, $db_link); $num_rows = mysql_num_rows($result); echo "$num_rows rows found";

Correct Answer: Calculate the md5 hash of a string The hash is a 32-character hexadecimal number I use it to generate keys which I use to identify users etc If I add random no techniques to it the md5 generated now will be totally different for the same string I am using

Correct Answer: On the server side, the main difference between GET and POST is where the submitted is stored The $_GET array stores data submitted by the GET method The $_POST array stores data submitted by the POST method On the browser side, the difference is that data submitted by the GET method will be displayed in the browser?s address field Data submitted by the POST method will not be displayed anywhere on the browser GET method is mostly used for submitting a small amount and less sensitive data POST method is mostly used for submitting a large amount or sensitive data