you can try to make a lock/unlock file so cronjobs can check to "know" if a job is/isn't already running.
also process pid could be used for identifying status of process in case something failed, not responding etc..
Set the status to a unique value, and then process everything with that unique value. Have a timeout or some sort of fallback if your processing fails half-way through (but you need that with your current situation anyway).
Something like (and I'm just making up PHP, since I don't particularly know the language):
$guid = new_guid();
'UPDATE x__mx_request SET status = ? WHERE status = "pending";',
$requests = db_all(
$this->db->query('SELECT * FROM x__mx_request WHERE status = ?;', $guid)
Another option is transactions - but I think you'd need SERIALIZABLE, which means you're basically stuck with only 1 job processing anyway. If you want to do that, a lock file for your cron job makes that easy to do without changing code.
Do you know the answer to this question? Write a quick response to it. With your help, we will make our community stronger.
About the technologies asked in this question
PHP (from the English Hypertext Preprocessor - hypertext preprocessor) is a scripting programming language for developing web applications. Supported by most hosting providers, it is one of the most popular tools for creating dynamic websites.
The PHP scripting language has gained wide popularity due to its processing speed, simplicity, cross-platform, functionality and distribution of source codes under its own license. https://www.php.net/
DBMS is a database management system. It is designed to change, search, add and delete information in the database. There are many DBMSs designed for similar purposes with different features. One of the most popular is MySQL.
It is a software tool designed to work with relational SQL databases. It is easy to learn even for site owners who are not professional programmers or administrators. MySQL DBMS also allows you to export and import data, which is convenient when moving large amounts of information. https://www.mysql.com/
HTML (English "hyper text markup language" - hypertext markup language) is a special markup language that is used to create sites on the Internet.
Browsers understand html perfectly and can interpret it in an understandable way. In general, any page on the site is html-code, which the browser translates into a user-friendly form. By the way, the code of any page is available to everyone. https://www.w3.org/html/
Welcome to programmierfrage.com
programmierfrage.com is a question and answer site for professional web developers, programming enthusiasts and website builders. Site created and operated by the community. Together with you, we create a free library of detailed answers to any question on programming, web development, website creation and website administration.
Get answers to specific questions
Ask about the real problem you are facing. Describe in detail what you are doing and what you want to achieve.
Help Others Solve Their Issues
Our goal is to create a strong community in which everyone will support each other. If you find a question and know the answer to it, help others with your knowledge.