My PHP blog

The Cleanest and easiest way to change the title format for WordPress

admin — Tue, 16 Mar 2021 11:49:00 +0000

I wish to change the format title in header in one of my wordpress websites. I know I can define a custom function to change that. I tried that, that is not working my template. Finally, I found a cleanest and easiest way to do, without writing a single line of code. That is to install Yoast SEO plug-in. This plug-in can allow the user to define page title in header for each page and post. That is very flexible. Moreover, it has a lot of placeholder too, such as site title, page title and post title.

Original post blogged on b2evolution.

UTF-8 Slug Issue on WordPress

admin — Sun, 10 Nov 2019 08:23:00 +0000

In the past, my hosting server supports UTF-8 URL, I can use the chinese name as Slug in wordpress. In the past few days, there is a server upgrade, then UTF-8 does not support anymore. In the past, because I am lazy, blogging in my top priority, I left the chinese name in URL. I know that is not good for SEO. Also, it made all post links are not working anymore.
I found only way is to reset all post slugs with a random number. I know that affects SEO, it made all post links in search engine in not working.
At the end I ran this sql to reset all old posts,
update set wp_posts
set post_name = floor(RAND()*10)+15
where post_name like '%\%%'

That is a bad solution, but that is the best solution I had now. Now, I manually write 301 Direct for all popular posts I have aware to the new url.

Original post blogged on b2evolution.

PHP Square Bracket Errors

admin — Tue, 27 Dec 2016 10:15:00 +0000

I built a wordpress plug-in. The plug-in is working fine in a server, but another server returned an error about '[. I compared the two servers. Their php is different. The problematic server got old version of php which is php .5.3. Then I read the php specification. The Square Bracket array declaration which used in C# and Java is only available on Php >=5.4. So I have to change square brackets to array(). Then it works fine.

Original post blogged on b2evolution.

The Database Object in WordPress

admin — Sun, 18 Dec 2016 23:41:00 +0000

You can access the database via WordPress. You can use any raw SQL too. That is quite easy. You only need to call a global object;
global $wpdb;
For the raw SQL, you can use query method:
$wpdb->query(
"
UPDATE $wpdb->posts
SET post_parent = 10
WHERE ID = 15

"
);

For get the record set,
$drafts = $wpdb->get_results(
"
SELECT *
FROM $wpdb->posts
WHERE post_status = 'draft'
AND post_author =1
"
);

There are insert, update and delete method too.
Please read WordPress development documentation for the further information

Original post blogged on b2evolution.

WordPress Serialize the JSON object

admin — Sun, 18 Dec 2016 00:57:00 +0000

Although WordPress got its own JSON API, you still have your own JSON API for your own plugin and serialize your own data. That is not a problem. WordPress library got a function to serialize any objects to JSON Format. That is very easy. You can use this function in any parts of your plug-in.
wp_send_json($user);

Original post blogged on b2evolution.

WordPress Finally got a REST API

admin — Sat, 10 Dec 2016 12:09:00 +0000

I used Wordpress as the development framework for a mobile application project. Wordpress has a set of XMLPRC api for a very long time. Moreover, the mainstream in Mobile development is to use JSON as the communication format, rather than XML. JSON is smaller and easier to deserialize back to an object. Originally, I planned to use a third party plug-in for REST API and with my own code to build my own version REST API for my mobile application. Today, I checked my WordPress; It got an update for WordPress 4.7. After the updates, I found this version finally got an official REST API. That is great. I can build my code on top of that!
You can check this demo from Wordpress

Original post blogged on b2evolution.

I upgraded this blog to b2evolution 6.7.7

admin — Tue, 04 Oct 2016 13:49:00 +0000

I have upgraded this blog to b2evolution 6.7.7. I found that is great, the backend is more beautiful and clean too. I found the color scheme too. One thing is good to b2evolution comparing with other blog platforms; that is a very standalone platform which got most functions you need. If you just need it to do blogging, then that is perfect, you do not need to install a single plugin. But the downside, you cannot use it for another purpose. Well, I just need this blog to do blogging. That is good enough. By the way, I installed a responsive skin too. I found that is the best way to get more traffic. Now, Google will downgrade the ranking if any websites are not mobile friendly.

Original post blogged on b2evolution.

Shortcode in WooCommerce

admin — Sun, 19 Jun 2016 19:40:00 +0000

If you want to have a new custom shortcode in WooCommerce, you can add the codes in wp-content\plug-ins\woocommerce\includes\class-wc-shortcode.php. That will works, however, that is not the best practice. Because if some one updated the woocomerce plug-ins, then your custom code will be overwritten. I suggest you write your plug-in, Then using:

Code

add_shortcode( 'list_products', 'list_products' );
    function list_products( $atts ) {
....
}

Then you can have your own shortcode, then you can use global $woocommerce_loop; , that global variable to retrieve the data from woocommerce.

Original post blogged on b2evolution.

	`add_shortcode( 'list_products', 'list_products' );`
	`function list_products( $atts ) {`
	`....`
	`}`