Convert Wordpress post meta to PHP array

Question

I have a Wordpress post meta to MySql like

[{"field":"Email:1","title":"email","explanation_text":"","explanation_text_location":"","html_styling":"","text_to_display":"","show_title_field":"","pdf_file":"","pdf_file_button_styling":"","pdf_file_button_text":""}]

I need to convert it to a PHP array. I used following code to make it as an array.

$wpaf_field_title = maybe_unserialize(get_post_meta(52, '__wpaf_field_title', true));
print_r(json_encode($wpaf_field_title));

But it returns me

"[{\"field\":\"Email:1\",\"title\":\"email\",\"explanation_text\":\"\",\"explanation_text_location\":\"\",\"html_styling\":\"\",\"text_to_display\":\"\",\"show_title_field\":\"\",\"pdf_file\":\"\",\"pdf_file_button_styling\":\"\",\"pdf_file_button_text\":\"\"}]"

@user3384985 data is not the type of serialize it json_encode you need to use json_decode. — Noman
– Noman, Commented Nov 15, 2015 at 6:31

Mat · Accepted Answer · 2015-11-15 09:50:48Z

As said in comments you have to use json_decode() function:

$json = '[{"field":"Email:1","title":"email","explanation_text":"","explanation_text_location":"","html_styling":"","text_to_display":"","show_title_field":"","pdf_file":"","pdf_file_button_styling":"","pdf_file_button_text":""}]';
$data = json_decode( $json );
var_dump( $data );

And then you get:

array(1) {
  [0]=>
  object(stdClass)#1 (10) {
    ["field"]=>
    string(7) "Email:1"
    ["title"]=>
    string(5) "email"
    ["explanation_text"]=>
    string(0) ""
    ["explanation_text_location"]=>
    string(0) ""
    ["html_styling"]=>
    string(0) ""
    ["text_to_display"]=>
    string(0) ""
    ["show_title_field"]=>
    string(0) ""
    ["pdf_file"]=>
    string(0) ""
    ["pdf_file_button_styling"]=>
    string(0) ""
    ["pdf_file_button_text"]=>
    string(0) ""
  }
}

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