有没有办法将这个javascript数组传递到php中，并将其传递到数据库mysql中？

如何更改已单击按钮的背景色？按钮。风格backgroundColor属性不显示。

let buttons = document.querySelectorAll('button');

let arraySelected = [];

buttons.forEach(button => {
    button.addEventListener('click', seatFunction);
});



function seatFunction(e){
    const { value } = e.target;
    let newArray = arraySelected;
    const index = arraySelected.findIndex((element)=>element===value);

    if(index !== -1){
        newArray.splice(index, 1);
        console.log(newArray);
        console.log(`The ${value} is removed`);
        //I want to change the background color of the button here  if this statement is met.
        // Example: changing background to red.
    }else{
        arraySelected.push(value);
        console.log(arraySelected);
    }

}