Function unserialize offset error - php

Question

I'm building a multilanguage website with Laravel4.
In the database i have column named "content" that contains serialized values for multiple languages. For example:
a:3:{s:2:"gb";s:15:"This is English";s:2:"es";s:5:"Hola!";s:2:"si";s:19:"Slovenija je zakon!";}
The serialized array contains of:
Language abbreviation, taken from Session
Content that comes from the input field
Now when I add new language to the database it creates new serialized string. Great!
But when I want to unserialize that string and add a value into it, i get the following error:
unserialize() [<a href='function.unserialize'>function.unserialize</a>]: Error at offset 0 of 30 bytes
Any ideas what is going on? I understand the meaning of the error, but it just makes no sense, since I'm sure that value in the database is serialized string.
public function setContentAttribute($value)
{
$lang = (Session::has('my.locale') ? Session::get('my.locale') : Config::get('app.locale'));
/* Create new serialized string */
if(empty($this->content)) {
$data[$lang] = $value['content'];
$this->attributes['content'] = serialize($data);
/* Update values */
} else {
$data = $this->content;
$data = unserialize($data)
$data[$lang] = $value['content'];
$this->attributes['content'] = serialize($data);
}
}
P.S: I'm using mutators for adding values to database.
I hope it's clear enough. If there is anything unclear, please comment and I'll fix it.
Thanks!

Answer 1

Ok, I've managed to fix it. I was unserializing my code twice - once in the accessor and once in the mutator. Here is a working example:
public function getVsebinaAttribute($value)
{
$data = unserialize($value);
$lang = $this->getLang();
if (!empty($data[$lang])) {
return $data[$lang];
} else {
return '# Value has not yet been added';
}
}
public function setVsebinaAttribute($value)
{
if (isset($this->attributes['vsebina'])) {
$data = unserialize($this->attributes['vsebina']);
} else {
$data = array();
}
$lang = $this->getLang();
$data[$lang] = $value;
$this->attributes['vsebina'] = serialize($data);
}
protected function getLang()
{
return Session::has('my.locale') ? Session::get('my.locale') : Config::get('app.locale');
}