How can I parse a JSON file with PHP?

Question

How can I parse a JSON file with PHP?

I tried to parse a JSON file using PHP. But I am stuck now.

This is the content of my JSON file:



{

    "John": {

        "status":"Wait"

    },

    "Jennifer": {

        "status":"Active"

    },

    "James": {

        "status":"Active",

        "age":56,

        "count":10,

        "progress":0.0029857,

        "bad":0

    }

}

And this is what I have tried so far:



<?php



$string = file_get_contents("/home/michael/test.json");

$json_a = json_decode($string, true);



echo $json_a['John'][status];

echo $json_a['Jennifer'][status];

But because I don't know the names (like 'John', 'Jennifer') and all available keys and values (like 'age', 'count') beforehand, I think I need to create some foreach loop.

I would appreciate an example for this.

json php

3 years ago by rahul07

2 Answers

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**akshay1995** · Answer 1 · 2021-06-01T09:09:16

To iterate over a multidimensional array, you can use RecursiveArrayIterator



$jsonIterator = new RecursiveIteratorIterator(

    new RecursiveArrayIterator(json_decode($json, TRUE)),

    RecursiveIteratorIterator::SELF_FIRST);



foreach ($jsonIterator as $key => $val) {

    if(is_array($val)) {

        echo "$key:\n";

    } else {

        echo "$key => $val\n";

    }

}

Output:



John:

status => Wait

Jennifer:

status => Active

James:

status => Active

age => 56

count => 10

progress => 0.0029857

bad => 0

**RoliMishra** · Answer 2 · 2021-06-02T14:00:24

If you use foreach iterate $json_a alone, you have an object of objects. Even if you pass in true as the second parameter, you have a two-dimensional array. If you're looping through the first dimension you can't just echo the second dimension like that. So this is wrong:

foreach ($json_a as $k => $v) {

   echo $k, ' : ', $v;

}

To echo the statuses of each person, try this:

<?php



$string = file_get_contents("/home/michael/test.json");

if ($string === false) {

    // deal with error...

}



$json_a = json_decode($string, true);

if ($json_a === null) {

    // deal with error...

}



foreach ($json_a as $person_name => $person_a) {

    echo $person_a['status'];

}



?>

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How can I parse a JSON file with PHP?

2 Answers

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