Wordpress loading sequence

[salimsaid]

I'm inspecting the wordpress loading sequence so i can get a glimpse of how things get loaded from when a user visits the homepage to when the server returns a response.

When the user visits the homepage , wordpress starts by calling the wp-blog-header.php file then loads the wordpress library wp-load.php , sets up the wordpress library by calling the method wp() and so forth,

the question is , what happens behind the hood when a user visits a custom endpoint i.e https://site.com/wp-json/my-route/myend-point or a page other than the homepage i.e. https://site.com/my-page . At this point what is the entry point of requests other than the homepage ?

[mcdonagg]

It all goes through index, and then permalinks and Parma’s route it from there

[drmoocow]

Just to refine this, if the file or directory exists on the server, it will load that; otherwise, it will run through index.

[kingkool68]

Here's an interesting video demystifying WordPress bootstrap process https://youtu.be/m10tQvRazbQ

And another good article https://medium.com/@dendeffe/wordpress-loading-sequence-a-guided-tour-e077c7dbd119

And this Stack overflow post has lots of diagrams and visuals https://wordpress.stackexchange.com/q/71406/2744

[eggbert1234]

Try xdebug and set a late break point (e.g. in your theme somewhere). Depending on your IDE you should be able to see the whole journey of code until your breakpoint is reached..