PHPで多次元JSON文字列配列から要素の値を取得する方法

このシンプルforeachさがあなたのお役に立てば幸いです。

解決策 1: ここでこのコード スニペットを試してください

$result=array();
foreach($array as $value)
{
    $array=  json_decode($value["product_details"],true);
    $result[]=$array[key($array)]["id"];
}
print_r($result);

ここでは、使用しているarray_column抽出するためにproduct_details、我々はに使用されているarray_map反復処理するために$personalDetailsすべて含まれているJSONし、我々がするために使用しているのをkey、配列の最初のキーを返す関数、およびそのキーを通じて私たちがアクセスしている、そのid。

解決策 2: ここでこのコード スニペットを試してください

<?php

ini_set('display_errors', 1);
$array = Array
    (
    0 => Array
        (
        "product_details" => '{"5f93f983524def3dca464469d2cf9f3e":{"id":"110","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":1400,"name":"Foot Massage","tax":null,"image":"http:\/\/acme.dev\/uploads\/product_image\/product_110_1_thumb.jpg","coupon":"9","book_date_":"2017-04-19","book_date_name_":"wed","start_timeslot_":"09:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"5f93f983524def3dca464469d2cf9f3e","subtotal":1400}}'
    ),
    1 => Array
        (
        "product_details" => '{"2723d092b63885e0d7c260cc007e8b9d":{"id":"109","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":700,"name":"Body Massage","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/product_109_1_thumb.jpg","coupon":"","book_date_":"2017-04-18","book_date_name_":"tue","start_timeslot_":"09:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"2723d092b63885e0d7c260cc007e8b9d","subtotal":700}}'
    ),
    2 => Array
        (
        "product_details" => '{"a3c65c2974270fd093ee8a9bf8ae7d0b":{"id":"108","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":3000,"name":"Alo","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/default.jpg","coupon":"","book_date_":"2017-04-21","book_date_name_":"fri","start_timeslot_":"10:00:00","end_timeslot_":"12:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"a3c65c2974270fd093ee8a9bf8ae7d0b","subtotal":3000}}'
    ),
    3 => Array
        (
        "product_details" => '{"a3c65c2974270fd093ee8a9bf8ae7d0b":{"id":"108","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":3000,"name":"Alo","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/default.jpg","coupon":"","book_date_":"2017-04-12","book_date_name_":"wed","start_timeslot_":"08:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"a3c65c2974270fd093ee8a9bf8ae7d0b","subtotal":3000}}'
    )
);
$personalDetails=  array_column($array, "product_details");

$result=array_map(function($value){
    $array=json_decode($value,true);
    return $array[key($array)]["id"];
}, $personalDetails);
print_r($result);

出力：

Array
(
    [0] => 110
    [1] => 109
    [2] => 108
    [3] => 108
)