如何将 JavaScript 变量传递给 PHP？

Question

I need extract the 24 numbers generated in this array and post to php for: $number1=; ... $number24=; What's the best practice?

var usedNums = new Array(76);

function newCard() {
  for (var i = 0; i < 24; i++) {
    setSquare(i);
  }
}

function setSquare(thisSquare) {
  var currSquare = "square" + thisSquare;
  var newNum;
  var colPlace = new Array(0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4);
  do {
    newNum = (colPlace[thisSquare] * 15) + getNewNum() + 1;
  }
  while (usedNums[newNum]);
  usedNums[newNum] = true;
  document.getElementById(currSquare).innerHTML = newNum;
}

function getNewNum() {
  return Math.floor(Math.random() * 75);
}

function anotherCard() {
  for (var i = 1; i < usedNums.length; i++) {
    usedNums[i] = false;
  }
  newCard();
}

Source: https://codepen.io/koriwade/pen/BoOqGM

Many Thanks

Answer 1

You can create a JSON object like {"num1":"value1","num2":"value2"}

The pass it to PHP via ajax request.

On PHP side you will receive an array once you json_decode

and then use extract function to map the array key as variables.

Answer 2

You cannot directly pass the js variables to php because the php runs on server side. But there are several ways of passing variables from JavaScript to PHP.

1. Send the information in a form as stated here
2. Pass it in Ajax
3. Make an HTTP request via an XMLHttpRequest request
4. Save the data in a cookie

Answer 3

With the help of ajax you can pass js variable to the PHP.

Answer 4

You may use JSON.stringify( var );

to send var to the server in a request

And Decode that afterwards, with json_decode($var,true);