css float and positioning
At this time, you must have read a lot of tutorials about css float. I bet all you know is something like “floating elements makes the elements float to the […]
CSS padding and margin
Padding and margin often cause misunderstandings. <div style=”width:100;height:100;background-color:#ff0000;”></div> The above html displays a 100×100 red block. What do you think the effects of the html below? <div style=”padding: 20px; width: […]
When does WordPress begin to load current theme file?
Although wordpress reads files of themes to get the theme information to display in the administraion panel, the load of active theme(such as load of theme specific functions) is done […]
What happens when activating a new WordPress theme?
When you activate a new wordpress theme in the dashboard of appearance/themes, switch_theme is called with the to-be-switched theme as the parameter. switch_theme saves the $$sidebars_widgets in the theme_mod-currenttheme option, […]
how does wordpress get the information about installed themes?
If you log in WordPress backend and click Appearance/Themes menu, you will see all installed themes. If you put a theme directory under wp-content/themes/, you will see the new theme […]
why ajax call return an extra 0 at end in WordPress?
If your use the returned data of an ajax call, you will find there is an unexpected extra 0 in the data. For example, if your action function is: function […]
WordPress Ajax
Ajax is used by wordpress for communication between browser and server. For example, after you login wordpress dashboard, drag a widget onto a sidebar, fill some settings and click the […]
WordPress cron job mechanism
A function in cron.php wp_cron() is hooked to init action to check crons(got from the ‘cron’ option in the wp_options table). if it sees there is a cron that should […]
the do order of several important actions in WordPress
WordPress action order is an important thing to consider when you call add_action to add your hook function to a specific action. Here is the order for some important actions. […]
A big misunderstanding about HTML checkbox
Today it turns out I got a big misunderstanding of HTML checkbox. I thought <input type=”checkbox” value=”1″> will check the box, while <input type=”checkbox” value=”0″> will uncheck the box. Unfortunately, […]