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Norak
Asked: 2020-06-27 07:51:41 +0800 CST 2020-06-27 07:51:41 +0800 CST

Upload one or several files to the server received in a json

  • 772

I receive a json of data, which can contain one or more attachments, all of them are received in base64. I give you an example:

{
"id": 1,
"data": {
    "nombre": "Nombre",
    "file1": "Mhuc2dvCg==",
    "file2": "Yhj4dysYn==",
    "file3": "Jusj6Hism==",
    "file4": "Rhsy7Yhah==",
    ...
    }
}

I have managed to upload a file, but I don't know how to make it identify each one that arrives in the json. That is, if I do:

$adjunto1 = isset($input['data']['file1']) ? $input['data']['file1'] : '';

And after this I call the function subirFichero($adjunto1);everything works correctly. But how do I recognize all the files that arrive in the json, that is, check that if it starts with "file" it is an attached file and insert them?

php

2 Answers

  1. Best Answer

    You have two solutions depending on whether or not you can/want to improve the structure of the JSON data sent:

    Keeping the JSON format

    You can iterate through each element using a foreachand check that the index is not nombre:

    <?php
/* Reproducimos la variable $input: */
$input = json_decode('
{
    "id": 1,
    "data": {
        "nombre": "Nombre",
        "file1": "Mhuc2dvCg==",
        "file2": "Yhj4dysYn==",
        "file3": "Jusj6Hism==",
        "file4": "Rhsy7Yhah=="
    }
}
', true);

/* Simulamos tu función agregando información de depuración */
function subirFichero($base64) {
    echo '<p>BASE64 recibido: ', $base64, '</p>', PHP_EOL;
}

/* Enumeramos los elementos e ignoramos el que se llame "nombre" */
foreach ($input['data'] as $clave => $base64) {
    if ($clave !== 'nombre') {
        subirFichero($base64);
    }
}

    The output obtained is:

    BASE64 recibido: Mhuc2dvCg==
BASE64 recibido: Yhj4dysYn==
BASE64 recibido: Jusj6Hism==
BASE64 recibido: Rhsy7Yhah==

    Optimizing the JSON format

    Normally, the content of the JSON facilitates its analysis by the application that receives the data, therefore the ideal is to adjust its content to a property that unambiguously enumerates the files:

    {
    "id": 1,
    "data": {
        "nombre": "Nombre",
        "files": [
            "Mhuc2dvCg==",
            "Yhj4dysYn==",
            "Jusj6Hism==",
            "Rhsy7Yhah=="
        ]
    }
}

    So the PHP code is greatly simplified:

    <?php
$input = json_decode('
{
    "id": 1,
    "data": {
        "nombre": "Nombre",
        "files": [
            "Mhuc2dvCg==",
            "Yhj4dysYn==",
            "Jusj6Hism==",
            "Rhsy7Yhah=="
        ]
    }
}
', true);

/* Simulamos tu función agregando información de depuración */
function subirFichero($base64) {
    echo '<p>BASE64 recibido: ', $base64, '</p>', PHP_EOL;
}

/* Enumeramos cada uno de los elementos */
foreach ($input['data']['files'] as $base64) {
    subirFichero($base64);
}

    The output obtained is (same as before):

    BASE64 recibido: Mhuc2dvCg==
BASE64 recibido: Yhj4dysYn==
BASE64 recibido: Jusj6Hism==
BASE64 recibido: Rhsy7Yhah==
    • 2

  2. You could do it using an array and a foreach like so:

    $files = array()
foreach($input['data'] as $key => $value) {
    if(strpos($key, 'file') !== false) {
        $files[] = $value;
    }
}

    Or if you want, you can upload the files inside the loop like so:

    foreach($input['data'] as $key => $value) {
    if(strpos($key, 'file') !== false) {
        subirFichero($value);
    }
}
    • 0