How do I traverse a JSON array in PHP?

JSON Array Traversal in PHP

Working with JSON data is essential in web development. A common task is iterating through JSON arrays to access and manipulate their elements. In PHP, you can achieve this using the json_decode() function.

To illustrate, consider the following JSON array:

[
    {
        "var1": "9",
        "var2": "16",
        "var3": "16"
    },
    {
        "var1": "8",
        "var2": "15",
        "var3": "15"
    }
]

To loop through this array, you can follow these steps:

$arr = json_decode('[{"var1":"9","var2":"16","var3":"16"},{"var1":"8","var2":"15","var3":"15"}]');

foreach($arr as $item) {
    $uses = $item['var1']; //etc
}

The json_decode() function converts the JSON string into a PHP array, which can then be iterated through using a regular loop. Within the loop, you can access the individual elements of each object in the array using the object key as an index, as demonstrated in the example above.

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