Issue with quotes when generating json from php

Question

I'm trying to generate a json using PHP, with data I get from a form. The fact is that I need to use quotes in the json format, and I try to add it using \\" but it don't works. If someone can help me I'd be gratefull!

Here's the code:

$clave = $_GET["laclave"];
$arrayClave = unserialize(base64_decode($clave));
$guardar = array();

foreach ($arrayClave as $value){
    $valorA = ("\"".$value."\":\"".$_GET[$value]."\"");
    $guardar[] = $valorA;
}

$fp = fopen('datatodo/prueba.json', 'w');
fwrite($fp, json_encode($guardar));
fclose($fp);

Answer 1

Json_encode does everything for you, just give it an array and it'll figure it out :-)

$clave = $_GET["laclave"];
$arrayClave = unserialize(base64_decode($clave));

$fp = fopen('datatodo/prueba.json', 'w');
fwrite($fp, json_encode($arrayClave));
fclose($fp);

Answer 2

From the manual page for json_encode() :

string json_encode ( mixed $value [, int $options = 0 [, int $depth = 512 ]] )

Returns a string containing the JSON representation of value.

value

The value being encoded. Can be any type except a resource.
All string data must be UTF-8 encoded.

The only thing you must take care of yourself is generating UTF-8 (if your source data uses a different encoding). This can be accomplished with mb_convert_encoding() or iconv()

You should also test the return value because you don't possibly want to generate files for invalid input:

Returns a JSON encoded string on success or FALSE on failure .

It'd be pointless to have a function to generate JSON manually, even in PHP ;-)