php - How to create db counter in wordpress -


let's i've got custom post type order , custom field order number, , let's these custom posts created on form submission.

what need increment order number field automatically in safe way, numbers aren't duplicated.

the trivial solution: on form submission, find last order , use number + 1. in case when 2 users submit form @ same time, same order number.

i doing such things custom frameworks in past: lock db row update, increment number, release. safely increment number. require creating separate table counter , i'd prefer avoid that.

i didn't find ready in wp api.

i'm using wp 3.8 on mysql.

auto-increment functionality implemented long time ago in mysql, have specify id of table auto_increment.

however, if insert data on form submission , create custom post type, inserting data in wp_posts table, done there, because table, posts stored in wordpress , already have id set auto_increment.


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