problems with database Full update

I would first recommend debugging what arrives at the server via AJAX. For this you can simply output values via var_dump() and can look at the response in the network tab of your browser.

Example:

function updateDataBase(){
 var_dump($_POST);wp_die();
}

If you see here that ‘text’ is already truncated at this point, then your AJAX request would be responsible.

I see Headers parameter Content-Length: 2059630 in Chrome DevTools, but var_dump($_POST); show me nothing in php function

What do you mean by “show me nothing in php function”? You should at least see an output like array() {} if the POST request is empty.

On the html page, when I started AJAX request pushing on a button I see nothing changes;

function updateDataBase(){
    global $wpdb;
    $table_name = $wpdb->get_blog_prefix() . 'sports_viewer';
    var_dump($_POST . ' dick');
    print_r($_POST);
    wp_die();
}

NO array.

Then the function will not be executed. Are you sure it is exactly this one? What comes back as response of the AJAX request?

I see request https://joxi.ru/Rmzy38McV9ZzXr
But when I show result AJAX in console I got –> https://joxi.ru/VrwxZ1JcgldQjm

I guess in your first screenshot you can see the post content. But this is not an array but a string, which is strange. Have a look at how you define the AJAX request in JavaScript.

My js code look like

async function getData() {
        let response = await fetch('https://api1.test.com/');
        if (!response.ok) {
            const message = <code>An error has occured: ${response.status}</code>;
            throw new Error(message);
        }
        let result = response.json();
        return await result
    }
$('#btn_update').click(function(){

        getData().then((data) => {
            const sportsJsonString =  JSON.stringify(data, null, "\t");
            console.log("sportsJsonString", sportsJsonString);
            fetch(ajaxurl, {
                method: 'POST',
                headers: {'Content-Type': 'application/x-www-form-urlencoded'},
                body: <code>action=updateDB&text=${sportsJsonString}</code>
            })
                .then((data) =>{
                    $('#btn_update').text('Повторно обновить');
                })
                .catch(err => console.error(err));
        })
    });

Why strange for you, that variable type of ‘sportsJsonString’ – string? If I push ‘data’ variable into table cell, I got [object Object] in this json cell.

• This reply was modified 2 years, 4 months ago by Andry.

During testing, I realized that the browser does not allow to write >415kB to the database (Chrome or FF makes no difference) It’s browser problem.

You can check it if you interrupt operations when accessing the file `wp-admin/admin-ajax.php’

The browser does not know about a database running only on the server. I am not even aware of such a limit. Where did you get this value?