Interview question #1

Since I have been asked to interview experienced PHP programmers, I was preparing few interview questions. I came to know, most of the people ask questions found in the Internet; most of them are like "What is the function used to connect MySQL DB in PHP". Personally, I don't like these types of questions; I'd thought the person must apply ideas what he was taught in colleges--finally I came out with one question:

A product vendor has Quantity Vs. Price data like
1 -> Rs. 50
2 -> Rs. 95
3 -> Rs. 140
.... like upto 1 million data. He wants a system, which gives the price when the quantity is provided. For example, if you provide the quantity value as 2, then it should provide Rs. 95. How this system can be designed?

As expected, all the people said about using database tables and quering on quantity. I have asked them to find out a system which doesn't use databases--provided the accuracy of the system may not be 100%--it may give at least 90% accuracy. To my surprise, none of the people I have interviewed yet didn't provide any solutions.

I must find out few other questions especially for a post of "Web Application Developer".

IP to ISP/Country/City (GeoIP) using PHP

I've noted that many people are searching here about how to find out City/Country/ISP details from IP; often referred as GeoIP. Here, I've compiled my replies that once I posted to comp.lang.php Get the IP Refer http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml and see which whois server should be used for the whois lookup Now, do the whois lookup. e.g., whois -h whois.apnic.net 61.x.x.x Parse the results. AFAIK, it will have the ISP, City and Country info For whois lookup, may use rwhois protocol through below PHP code: <?php function whois($host, $command) { $fp = fsockopen ($host, 43, $errno, $errstr, 100); if (!$fp) { $result = $errstr . $errno . "\n"; } else { fputs ($fp, $command . "\r\n\r\n"); $result = ''; while (!feof($fp)) { $result .= fgets ($fp, 128); } fclose ($fp); } return $result; } //debug... echo whois('whois.internic.net', 'php.net'); ?> Re...

Who is RJ Joshua and where is he?

After I have given my Humble Award to RJ Joshua , I have noticed that many people are visiting my blog when they're searching his name in search engines. I used to listen to his English programs on AIR Chennai FM sometime ago; but couldn't get his details on the internet for a long time. Recently I have spotted his photo in potofthots.com and I have stolen that photo too:-) Hope, this little photo of him (with Sanjay Pinto sitting in front) would give good feeling to his fans and well-wishers.