PHP / MySQL：如何从mysql字段访问数组值

Question

I have a field value in a mySQL table that I save into a variable called "$mp3".

If I echo this variable, I get this:

a:3:{s:4:"file";s:114:"/home/www/xxxxx/web/admin/wp-content/uploads/2014/05/table3_podcast_20141.mp3";s:3:"url";s:92:"http://www.xxxx.com/admin/wp-content/uploads/2014/05/table3_podcast_20141.mp3";s:5:"error";b:0;}

How should I complete my variable in order to only retrieve this part of the array (whatever its content):

http://www.xxxx.com/admin/wp-content/uploads/2014/05/table3_podcast_20141.mp3

Thank you!

Answer 1

That value is a serialized storage of a PHP array.

To reconstruct the array you need to use unserialize:

$data = unserialize($mp3);
$url = $mp3['url'];