calculate the sum of values in an array ?

04:14
array_sum method can calculate sum of values in an array
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How we know browser properties?

03:39
echo $_SERVER['HTTP_USER_AGENT'];

$browser = get_browser();
foreach ($browser as $name => $value) {
echo “$name $value
\n”;
}

get_browser   returns the capabilities of the user's browser.
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What is CAPTCHA?

03:36
CAPTCHA stands for Completely Automated Public Turing Test
to tell Computers and Humans  Apart.the application can be fairly
 assured that there is a human client using it.
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MySQL data directory?

03:12
MySQL data directory is most important location in which all 
MySQL databases are stored. The default data directory is located in the file mysql.lf.
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difference between mysql_connect and mysql_pconnect?

03:11

Mysql_connect:
 Opens a new connection to the database
  The database connection can be closed
  Opens the page every time the page is loaded.

Mysql_pconnect:
 Opens a persistent connection to the database.
The database connection can not be closed.
The page need not be opened every time the page is loaded.
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php interview questions

01:55
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sitemap seo for multiple languages

05:27
IT  should include every page you want to be indexed by the search engines. If you have different URLs for different languages then those URLs must be included as well.
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SEO 301 redirect limits

05:25
301 redirects are very useful if people access your site through several different URLs. For instance, your page for a given ID can be accessed in multiple ways
It is a good idea to pick one of those URLs (you have decided to be http://yoursite.com/foo/ID/some-friendly-string) as your preferred URL and use 301 redirects to send traffic from the other URLs to your preferred one.
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seo optimize a bunch of similar images

05:23
try to give specific name of image in relation to what image shows to alternate keywords.
creative ways to use the keywords that best describe the product. 
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Sitemap error on Google webmaster tools

05:18
Need to provide an XML formatted sitemap file (sitemap.xml).

<?xml version='1.0' encoding='utf-8' ?>
<urlset xmlns='http://www.sitemaps.org/schemas/sitemap/0.9'>
    <url>
     <loc>http://myDomain.com</loc>
    </url>
    <url>
     <loc>http://myDomain.com/about.html</loc>
    </url>
    <url>
     <loc>http://myDomain.com/faq.html</loc>
    </url>
    <url>
     <loc>http://myDomain.com/careers.html</loc>
    </url>
</urlset>

make sure your sitemap doesn't contain BOTH of the following: 
http://mydomain.com/ or http://www.mydomain.com/

AND

http://mydomain.com/index.html or http://www.mydomain.com/index.html
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