PHP code example of izica / php-collection

1. Go to this page and download the library: Download izica/php-collection library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.
    
        
<?php
require_once('vendor/autoload.php');

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

    

izica / php-collection example snippets



$collection = PhpCollection:collect([100, 200, 300, 400]);
$collection2 = $collection->filter(function($item){
    return $item > 200;
})

/*
    $collection != $collection2
*/


$products = [
    ["id" => 1, "name" => "product 1", "price" => 100],
    ["id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 3, "name" => "product 3", "price" => 300]
];

$collection = PhpCollection:collect($products);

// make collection from single element
$collection = PhpCollection:collect($products[0], true);


$collection = PhpCollection:collect([100, "data", 300, 400])->implode();
/*
    100, data, 300, 400
*/

$products = [
    ["id" => 1, "name" => "product 1", "price" => 100],
    ["id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 3, "name" => "product 3", "price" => 300]
];

// should return string
$serializer = function($item){
    return "{$item['name']}-{$item['price']}$"; // or for example -- return json_encode($item);
};

$collection = PhpCollection:collect($products)->implode(", ", $serializer);
/*
    product 1-100$, product 2-200$, product 3-300$
*/

$products = [
    ["id" => 1, "name" => "product 1", "price" => 100],
    ["id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 3, "name" => "product 3", "price" => 300]
];

$collection = PhpCollection:collect($products)->pluck("id")->all();
/*
    [1, 2, 3]
*/  

$collection = PhpCollection:collect($products)->pluck("name")->all();
/*
    ["product 1", "product 2", "product 3"]
*/ 

$products = [
    ["id" => 1, "name" => "product 1", "price" => 100],
    ["id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 3, "name" => "product 3", "price" => 300]
];

$collection = PhpCollection:collect($products)->only(["id", "name"])->all();
/*
[
    ["id" => 1, "name" => "product 1"],
    ["id" => 2, "name" => "product 2"],
    ["id" => 3, "name" => "product 3"]
]
*/

$collection = PhpCollection:collect($products)->only(["id", "name" => "title"])->all();

/*
[
    ["id" => 1, "title" => "product 1"],
    ["id" => 2, "title" => "product 2"],
    ["id" => 3, "title" => "product 3"]
]
*/


$products = [
    ["id" => 1, "name" => "product 1", "price" => 100],
    ["id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 3, "name" => "product 3", "price" => 300]
];

$collection = PhpCollection:collect($products)->exclude(["name"])->all();

/*
[
    ["id" => 1, "price" => 100],
    ["id" => 2, "price" => 200],
    ["id" => 3, "price" => 300]
]
*/


$products = [
    ["id" => 1, "name" => "product 1", "price" => 100],
    ["id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 3, "name" => "product 3", "price" => 300]
];

$collection = PhpCollection:collect($products)
    ->filter(function($item){
        return $item["price"] > 100    
    })
    ->all();

/*
[
    ["id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 3, "name" => "product 3", "price" => 300]
]
*/


$products = [
    ["id" => 1, "name" => "product 1", "price" => 100],
    ["id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 3, "name" => "product 3", "price" => 300]
];

$collection = PhpCollection:collect($products)
    ->map(function($item){
        $item["pricex2"] = $item["price"] * 2;
        return $item;   
    })
    ->all();

/*
[
    ["id" => 1, "name" => "product 1", "price" => 100, "pricex2" => 200],
    ["id" => 2, "name" => "product 2", "price" => 200, "pricex2" => 400],
    ["id" => 3, "name" => "product 3", "price" => 300, "pricex2" => 600]
]
*/


$products = [
    ["id" => 16, "name" => "product 1", "price" => 100],
    ["id" => 22, "name" => "product 2", "price" => 200],
    ["id" => 31, "name" => "product 3", "price" => 300]
];

$collection = PhpCollection:collect($products)->keyBy("id")->all();

/*
[
    16 => ["id" => 1, "name" => "product 1", "price" => 100, "pricex2" => 200],
    22 => ["id" => 2, "name" => "product 2", "price" => 200, "pricex2" => 400],
    31 => ["id" => 3, "name" => "product 3", "price" => 300, "pricex2" => 600]
]
*/


$products = [
    ["id" => 16, "category_id" => 1, "name" => "product 1", "price" => 100],
    ["id" => 22, "category_id" => 2, "name" => "product 2", "price" => 200],
    ["id" => 31, "category_id" => 2, "name" => "product 3", "price" => 300]
];

$collection = PhpCollection:collect($products)->groupBy("category_id")->all();

/*
[
    1 => [
        ["id" => 16, "category_id" => 1, "name" => "product 1", "price" => 100]
    ],
    2 => [
        ["id" => 22, "category_id" => 2, "name" => "product 2", "price" => 200],
        ["id" => 31, "category_id" => 2, "name" => "product 3", "price" => 300]
    ]   
]
*/