Chartjs-Undefined x values in chart.js

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Okay it can be seen that your data is actually included in data.data because data variable contains a property with the name of data

Also there is another flaw in your code. In javascript we can’t iterate items of an array with for (var i in arr) (this can only be used to iterate through keys of an object)

So you should change the for part of your code to the following

var arr = data.data;
for(var i=0;i<arr.length;i++) {
            item = arr[i];
            players.push("Player " + item.first_name);
            ages.push(item.age);
        }

Indeed it’s better to rename the variable named data to response:

$.ajax({
    url: "staff.php",
    method: "GET",
    success: function(response) {
        console.log(response.data);
})

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