WordPress Interview Questions

Ans: WordPress is an online, open source website creation tool written in PHP. But in non-geek speak, it's probably the easiest and most powerful blogging and website content management system (or CMS) in existence today. Ans: The default version of WordPress is incorporated with 11 tables with previous version. They are:

1. wp_options
2. wp_users
3. wp_links
4. wp_commentmeta
5. wp_term_relationships
6. wp_postmeta
7. wp_posts
8. wp_term_taxonomy
9. wp_usermeta
10. wp_terms
11. wp_comments

But in New version as of 4.5.3 there are 12 default tables which are:

1. wp_commentmeta
2. wp_comments
3. wp_links
4. wp_options
5. wp_postmeta
6. wp_posts
7. wp_termmeta
8. wp_terms
9. wp_term_relationships
10. wp_term_taxonomy
11. wp_usermeta
12. wp_users

Note: wp_termmeta is newly added. Ans: Yes! A WordPress Website is completely secure from any unauthorized access. However, the error may occur due to downloading the Plug-in and Tools from an unauthorized resource. Note: Now various Plugins are available for security like Limit Login Attempts etc. Ans: The command to call a constructor for a parent class is parent::constructor($value); Ans: All the objects are passed by Value. Ans: There is no limitation level to the depth. Ans: Yes, overriding of database values is possible. Ans: Yes! WordPress was born with one of the key features to drive the traffic called built-in SEO and it is the most considered point along with other features in this technology, which makes it popular worldwide.

Search engine optimization is considered the best selling point of WordPress to boost the traffic over the web or in other words Google ranking. Although there are multiple CMSs, they require an installed SEO extension, whether commercial or free, but WordPress is SEO-ready.

It can further extend the SEO feature via a few Nice FREE SEO plugins, including All in one SEO and Yoast. This well-known & popular plug-ins help you rank your website’s on multiple search engines like Google, Bing, and Yahoo. Ans: Posts and pages are the two content types used in WordPress. When WordPress is used as a blogging platform, the majority of the content posts. Posts are timed and are listed in chronological order with the latest posts on the top. The old posts are archived on the basis of month and year. Posts are meant to be shared and commented on. Pages in WordPress, on the other hand, are static content that may include about us, contact us, privacy policies and others pages. The pages are timeless entries and do not have a date or month associated with them. For instance, even if you make changes to them, you will not have a Privacy policy page 2014 and Privacy policy page 2015 and so on. WordPress pages are not interactive and users do not share or comment on it.

• Posts are timely entries and pages are not tied with time.
• Pages cannot be included in RSS feed, while posts can.
• Posts are shared on social media and pages are not.
• Posts are categorized on the basis of time, whereas, pages are hierarchical.
• There is no custom template in posts but they are in the pages.

Ans:

• Posts are listed entries that are maintained in chronological order timely, but Pages are static and that are are not bounded with time.
• Posts are for everyone means social, but in contrast Pages are NOT social. You can categorize Post accordingly, but Pages are maintained in hierarchical order.
• Posts are displayed in RSS feed, but not Pages.
• Pages are featured with custom template, but Posts are not.

1. Simplicity
2. Flexibility
3. Publish with Ease
4. Publishing Tools
5. User Management
6. Media Management
7. Easy Theme System
8. Extend with Plugins
9. Built-in Comments
10. Search Engine Optimized
11. Multilingual
12. Easy Installation and Upgrades
13. Importers
14. Community
15. Contribute

Ans: Passing a variable by value in WordPress is similar to as that in C++. We have to just add an ampersand in front of the variable to do the task. $X= &$Y Ans: It is really easy to find out the no. of parameters passed into the function by following the below-provided command: func_num_args() Ans: The endif function is used to end the conditional statement when the parent if is followed by: and the code is blocked without the use of any braces. Ans: A data kept inside a single quoted string is not parsed for variable substitution whereas when we initialize the string with the double quote the data is parsed for variable substitution. If we don’t require variable substitution particularly then it is always preferred to use a single quote as it is a much speedy process. Ans: Ternary Condition is a very popular operator in PHP which evaluates the expression preceding the ?. If the condition is true then it executes the expression preceding: and If the condition is false then it executes the expression following. Syntax: exp? if exp is true then this code: else this code Ans: Both include and require scans the program. If the require() function doesn’t find any file then the script will not execute. On the other hand, if the include() file can’t find a file or encounter any error then the warning notification will be raised but the script will still execute. Ans: The error in the output is due to the fact that the interpreter declares a number as octal if it starts with 0. Ans: When we access a class method via -> we will require object initialization but when we choose:: we can access the methods which perform a static operation. Ans:You can get the page name from below of two? $slug = basename(get_permalink()); OR $pagename = get_query_var('pagename'); Ans: echo bloginfo('version'); Above is get from below file. You can check in wp-includes/version.php $wp_version = '4.1.2'; Ans:Open the wp-config.php file and WP_DEBUG set the false. define('WP_DEBUG', false ); Ans:These are function used when you website multilingual. each of this function have two parameter. 1st parameter: String which you want to convert from one language to another. 2nd parameter: domain name. Ans: 1) Action Hooks
2) Filter hooks
Hooks allow user to create WordPress theme or plugin with shortcode without changing the original files. Action hooks allow you to insert an additional code from an outside resource, whereas, Filter hooks will only allow you to add a content or text at the end of the post. Ans: By default, wp_ is the prefix for WordPress, it can be changed as per your need from wp-config.php Ans:Keeping all the limitations in mind, WPML would be the best multi-lingual plugin for WordPress. Ans: Matthew Charles Mullenweg. Ans: 1) Following are Actions hooks:

• has_action()
• add_action()
• do_action()
• do_action_ref_array()
• did_action()
• remove_action()
• remove_all_actions()

2) Following are Filters hooks:

• has_filter()
• add_filter()
• apply_filters()
• apply_filters_ref_array()
• current_filter()
• remove_filter()
• remove_all_filters()

Ans:Using do_shortcode() function inside of php tag.

A very simple solution is to use the do_shortcode() function inside a PHP echo tag.

The shortcode is used in WordPress post or page and text box widget and php file.