php - 如何使用 PHP 从 JSON 中提取和访问数据？

Question

This is intended to be a general reference question and answer covering many of the never-ending "How do I access data in my JSON?" questions. It is here to handle the broad basics of decoding JSON in PHP and accessing the results.

我有 JSON:

{
    "type": "donut",
    "name": "Cake",
    "toppings": [
        { "id": "5002", "type": "Glazed" },
        { "id": "5006", "type": "Chocolate with Sprinkles" },
        { "id": "5004", "type": "Maple" }
    ]
}

如何在 PHP 中对其进行解码并访问结果数据？

Answer 1

<?php
$jsonData = '{
    "type": "donut",
    "name": "Cake",
    "toppings": [
        { "id": "5002", "type": "Glazed" },
        { "id": "5006", "type": "Chocolate with Sprinkles" },
        { "id": "5004", "type": "Maple" }
    ]
}';

// Decode the JSON
$data = json_decode($jsonData, true);

// Access the data
$type = $data['type'];
$name = $data['name'];
$toppings = $data['toppings'];

// Access individual topping details
$firstTopping = $toppings[0];
$firstToppingId = $firstTopping['id'];
$firstToppingType = $firstTopping['type'];

// Print the data
echo "Type: $type\n";
echo "Name: $name\n";
echo "First Topping ID: $firstToppingId\n";
echo "First Topping Type: $firstToppingType\n";
?>

在此示例中，json_decode() 用于将 JSON 数据解码为 PHP 关联数组。然后，您可以像访问任何 PHP 数组一样访问该数组的各个元素。