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@ 2019-08-25T06:11:36Z

<?php

$data_json = '{
    "EXPORT": [
      {
        "dates": "2019-07-01",
        "c_job": 12
      },
      {
        "dates": "2019-07-02",
        "c_job": 8
      },
      {
        "dates": "2019-07-04",
        "c_job": 11
      }
    ],
    "IMPORT": [
      {
        "dates": "2019-07-03",
        "c_job": 11
      }
    ]
}';
$blank_json = '[
    {
      "dates": "2019-07-01",
      "c_job": 0
    },
    {
      "dates": "2019-07-02",
      "c_job": 0
    },
    {
      "dates": "2019-07-03",
      "c_job": 0
    },
    {
      "dates": "2019-07-04",
      "c_job": 0
    }
  ]';
$data = json_decode($data_json, true);
$blank = json_decode($blank_json, true);

$datafinal = array();
foreach ($data as $key => $value) {
    foreach ($blank as $bkey => $bvalue) {
        if (($dkey = array_search($bvalue['dates'], array_column($value, 'dates'))) !== false) {
            $datafinal[$key][$bkey] = $value[$dkey];
        }
        else {
            $datafinal[$key][$bkey] = $bvalue;
        }
    }
}
echo json_encode($datafinal, JSON_PRETTY_PRINT);

Output for git.master, git.master_jit, rfc.property-hooks: { "EXPORT": [ { "dates": "2019-07-01", "c_job": 12 }, { "dates": "2019-07-02", "c_job": 8 }, { "dates": "2019-07-03", "c_job": 0 }, { "dates": "2019-07-04", "c_job": 11 } ], "IMPORT": [ { "dates": "2019-07-01", "c_job": 0 }, { "dates": "2019-07-02", "c_job": 0 }, { "dates": "2019-07-03", "c_job": 11 }, { "dates": "2019-07-04", "c_job": 0 } ] }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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