PHP code example of halaxa / json-machine

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

halaxa / json-machine example snippets

use \JsonMachine\Items;

$fruits = Items::fromFile('fruits.json');

foreach ($fruits as $name => $data) {
    // 1st iteration: $name === "apple" and $data->color === "red"
    // 2nd iteration: $name === "pear" and $data->color === "yellow"
}

use JsonMachine\JsonDecoder\ExtJsonDecoder;
use JsonMachine\Items;

$objects = Items::fromFile('path/to.json', ['decoder' => new ExtJsonDecoder(true)]);

use \JsonMachine\Items;

$fruits = Items::fromFile('fruits.json', ['pointer' => '/results']);
foreach ($fruits as $name => $data) {
    // The same as above, which means:
    // 1st iteration: $name === "apple" and $data->color === "red"
    // 2nd iteration: $name === "pear" and $data->color === "yellow"
}

use \JsonMachine\Items;

$fruits = Items::fromFile('fruitsArray.json', ['pointer' => '/results/-/color']);

foreach ($fruits as $key => $value) {
    // 1st iteration:
    $key == 'color';
    $value == 'red';
    $fruits->getMatchedJsonPointer() == '/results/-/color';
    $fruits->getCurrentJsonPointer() == '/results/0/color';

    // 2nd iteration:
    $key == 'color';
    $value == 'yellow';
    $fruits->getMatchedJsonPointer() == '/results/-/color';
    $fruits->getCurrentJsonPointer() == '/results/1/color';
}

use \JsonMachine\Items;

$fruits = Items::fromFile('fruits.json', ['pointer' => '/lastModified']);
foreach ($fruits as $key => $value) {
    // 1st and final iteration:
    // $key === 'lastModified'
    // $value === '2012-12-12'
}

use \JsonMachine\Items;

$fruits = Items::fromFile('fruits.json', ['pointer' => '/lastModified']);
$lastModified = iterator_to_array($fruits)['lastModified'];

use \JsonMachine\Items;

$fruits = Items::fromFile('fruits.json', [
    'pointer' => ['/berries', '/citruses']
]);

foreach ($fruits as $key => $value) {
    // 1st iteration:
    $value == ["name" => "strawberry", "color" => "red"];
    $fruits->getCurrentJsonPointer() == '/berries';

    // 2nd iteration:
    $value == ["name" => "raspberry", "color" => "red"];
    $fruits->getCurrentJsonPointer() == '/berries';

    // 3rd iteration:
    $value == ["name" => "orange", "color" => "orange"];
    $fruits->getCurrentJsonPointer() == '/citruses';

    // 4th iteration:
    $value == ["name" => "lime", "color" => "green"];
    $fruits->getCurrentJsonPointer() == '/citruses';
}

use JsonMachine\Items;

$fileSize = filesize('fruits.json');
$fruits = Items::fromFile('fruits.json', ['debug' => true]);
foreach ($fruits as $name => $data) {
    echo 'Progress: ' . intval($fruits->getPosition() / $fileSize * 100) . ' %'; 
}

use JsonMachine\JsonDecoder\PassThruDecoder;
use JsonMachine\Items;

$items = Items::fromFile('path/to.json', ['decoder' => new PassThruDecoder]);

use JsonMachine\Items;
use JsonMachine\JsonDecoder\DecodingError;
use JsonMachine\JsonDecoder\ErrorWrappingDecoder;
use JsonMachine\JsonDecoder\ExtJsonDecoder;

$items = Items::fromFile('path/to.json', ['decoder' => new ErrorWrappingDecoder(new ExtJsonDecoder())]);
foreach ($items as $key => $item) {
    if ($key instanceof DecodingError || $item instanceof DecodingError) {
        // handle error of this malformed json item
        continue;
    }
    var_dump($key, $item);
}

use JsonMachine\Items;
use JsonMachine\JsonDecoder\PassThruDecoder;

$users = Items::fromFile('users.json', ['decoder' => new PassThruDecoder]);
foreach ($users as $user) {
    foreach (Items::fromString($user, ['pointer' => "/friends"]) as $friend) {
        // process friends one by one
    }
}

spl_autoload_register(

diff


use \JsonMachine\Items;

// this often causes Allowed Memory Size Exhausted
- $users = json_decode(file_get_contents('500MB-users.json'));

// this usually takes few kB of memory no matter the file size
+ $users = Items::fromFile('500MB-users.json');

foreach ($users as $id => $user) {
    // just process $user as usual
    var_dump($user->name);
}