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Wordpress Interview Questions

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The version number for improved versions of WordPress might not follow a strictly monotonic or periodic numerical (or in the case of test releases, alphabetical) sequence, since the version numbers reflect relative progress, and the changes made to existing or previous versions. So, for example, since v1.2 is a majorly revamped version of v1.0 (with about 60% of the code having been touched), 1.1 was ’skipped’ along the way. 

This is a limitation of the way PHP is set up on your server. If you previously used MovableType, Perl was probably set up with suexec so Movable Type executed as your user. In this case, PHP is running as the web server user, which is why it has to be at least 444. There is phpsuexec but it seems many hosts don’t use it.

However this is often not an issue on modern shared hosts because even though the file is “world" readable each account is set up with a "jailshell" which keeps people locked in their home directory, and PHP can be easily modified with an open_basedir restriction to keep people from writing PHP scripts to read your files. If you are really concerned, you should contact your host to see what measures they are taking. 

By default, WordPress reroutes a registered user to the Administration Panels after they log into the blog. To change the page, there are WordPress Plugins that can handle the redirect, or you can set the Theme function to handle it. See Function_Reference/wp_login_url. 

You can use your .htaccess file to protect images from being hot linked, or, in other words, being linked-to from other websites. This can be a drain on your bandwidth, because if someone links directly to the image on your site, then you lose the bandwidth. 

Comment flooding is when a lot of comments (probably spam) are posted to your website in a very short duration of time. This is only one aspect of the broader problem of comment spam in general, but it can quickly overwhelm a moderator's ability to manually delete the offending comments.

WordPress manages the worst floods automatically by default. Any commenters from the same IP or e-mail address (other than registered users with manage_options capabilities) that post within 15 seconds of their last comment gets their comment discarded. The time setting can be changed by a number of plugins that extend this functionality. You might also consider one of the many broader spam blocking plugins, such as Akismet, or even turning your comment system over to Disqus.

You could also just change the time setting by directly hacking the core file, but the correct way would be to create and install a very basic plugin and insert the following code:

function dam_the_flood( $dam_it, $time_last, $time_new ) {
 if ( ($time_new - $time_last) < 300 ) // time interval is 300
  return true; // seconds
 return false;
}
add_filter('comment_flood_filter', 'dam_the_flood', 10, 3);

Creating plugins can be very easy, the above code actually has most of the work done for you. 

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