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Weird unserialize problem


doddsey_65

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I have an array from the database like so

 

Array (2)
(
|    ['0'] => Array (4)
|    (
|    |    ['f_fid'] = String(1) "1"
|    |    ['0'] = String(1) "1"
|    |    ['f_names'] = String(99) "a:4:{i:0;s:18:"register_user_name";i:1;s:5:"r_u_n";i:2;s:10:"user_alias";i:3;s:12:"nickusername";} "
|    |    ['1'] = String(99) "a:4:{i:0;s:18:"register_user_name";i:1;s:5:"r_u_n";i:2;s:10:"user_alias";i:3;s:12:"nickusername";} "
|    )
|    ['1'] => Array (4)
|    (
|    |    ['f_fid'] = String(1) "2"
|    |    ['0'] = String(1) "2"
|    |    ['f_names'] = String(104) "a:4:{i:0;s:18:"register_password";i:1;s:5:"r_pass_word";i:2;s:10:"user_pass";i:3;s:12:"reg-pass-word";} "
|    |    ['1'] = String(104) "a:4:{i:0;s:18:"register_password";i:1;s:5:"r_pass_word";i:2;s:10:"user_pass";i:3;s:12:"reg-pass-word";} "
|    )
)

 

So i use a foreach loop to turn the serialized value into an array

 

foreach($fields as $key => $val)
    {
        $fields[$key]['f_names'] = unserialize($val['f_names']);
    }

 

But for some reason the last f_names is false

 

Array (2)
(
|    ['0'] => Array (4)
|    (
|    |    ['f_fid'] = String(1) "1"
|    |    ['0'] = String(1) "1"
|    |    ['f_names'] => Array (4)
|    |    (
|    |    |    ['0'] = String(18) "register_user_name"
|    |    |    ['1'] = String(5) "r_u_n"
|    |    |    ['2'] = String(10) "user_alias"
|    |    |    ['3'] = String(12) "nickusername"
|    |    )
|    |    ['1'] = String(99) "a:4:{i:0;s:18:"register_user_name";i:1;s:5:"r_u_n";i:2;s:10:"user_alias";i:3;s:12:"nickusername";} "
|    )
|    ['1'] => Array (4)
|    (
|    |    ['f_fid'] = String(1) "2"
|    |    ['0'] = String(1) "2"
|    |    ['f_names'] = Boolean(0) FALSE
|    |    ['1'] = String(104) "a:4:{i:0;s:18:"register_password";i:1;s:5:"r_pass_word";i:2;s:10:"user_pass";i:3;s:12:"reg-pass-word";} "
|    )
)

 

Anyone have any idea why?

 

Thanks

 

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While it doesn't have anything to do with your problem, you should be using a fetch_assoc statement to retrieve your data (you are using fetch_array now, giving both associative and numerical arrays in your data.)

 

If that's your actual data, it is invalid for the 2nd set of values (the length of some of the strings doesn't match what the serialized syntax says they are.)

 

What does using var_export on the data produce (so that someone here could reproduce the problem.)

 

Edit: Specifically, the strings you show in that data would produce the following serialized output -

 

a:4:{i:0;s:17:"register_password";i:1;s:11:"r_pass_word";i:2;s:9:"user_pass";i:3;s:13:"reg-pass-word";}

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heres the var_export dump

 

array ( 0 => array ( 'f_fid' => '1', 0 => '1', 'f_names' => 'a:4:{i:0;s:18:"register_user_name";i:1;s:5:"r_u_n";i:2;s:10:"user_alias";i:3;s:12:"nickusername";} ', 1 => 'a:4:{i:0;s:18:"register_user_name";i:1;s:5:"r_u_n";i:2;s:10:"user_alias";i:3;s:12:"nickusername";} ', ), 1 => array ( 'f_fid' => '2', 0 => '2', 'f_names' => 'a:4:{i:0;s:18:"register_password";i:1;s:5:"r_pass_word";i:2;s:10:"user_pass";i:3;s:12:"reg-pass-word";} ', 1 => 'a:4:{i:0;s:18:"register_password";i:1;s:5:"r_pass_word";i:2;s:10:"user_pass";i:3;s:12:"reg-pass-word";} ', ), )

Im using PDO's fetch_results. I used to use fetch_assoc within a while loop but thought that a foreach loop would work better. PDO's fetch_assoc only brings back one row if not used within a while loop.

 

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I'm not sure what's wrong, but wanted to point this out in case it means something to anyone else, I think it's what PFMaBiSmAd was refering to.

 

This is from the first index:

 

['f_names'] = String(99) "a:4:{i:0;s:18:"register_user_name";i:1;s:5:"r_u_n";i:2;s:10:"user_alias";i:3;s:12:"nickusername";} "

['1'] = String(99) "a:4:{i:0;s:18:"register_user_name";i:1;s:5:"r_u_n";i:2;s:10:"user_alias";i:3;s:12:"nickusername";} "

 

This is from the second index:

 

['f_names'] = String(104) "a:4:{i:0;s:18:"register_password";i:1;s:5:"r_pass_word";i:2;s:10:"user_pass";i:3;s:12:"reg-pass-word";} "

['1'] = String(104) "a:4:{i:0;s:18:"register_password";i:1;s:5:"r_pass_word";i:2;s:10:"user_pass";i:3;s:12:"reg-pass-word";} "

 

Notice that in the first index, f_names has "register_user_name" "r_u_n" "user_alias" etc.

 

In the second index, f_names is an EXACT duplicate of '1' from below, it doesn't have "register_user_name" "r_u_n" or "user_alias".

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even when using fetch_assoc it still brings up the same case.

 

while($fields = $sth->fetch(PDO::FETCH_ASSOC))
    {    
        $names[] = unserialize($fields['f_names']);
    }

 

a dump of $fields in the loop shows

Array (2)
(
|    ['f_fid'] = String(1) "1"
|    ['f_names'] = String(99) "a:4:{i:0;s:18:"register_user_name";i:1;s:5:"r_u_n";i:2;s:10:"user_alias";i:3;s:12:"nickusername";} "
)
Array (2)
(
|    ['f_fid'] = String(1) "2"
|    ['f_names'] = String(104) "a:4:{i:0;s:18:"register_password";i:1;s:5:"r_pass_word";i:2;s:10:"user_pass";i:3;s:12:"reg-pass-word";} "
)

 

but when i dump $names all i get is

 

Array (2)
(
|    ['0'] => Array (4)
|    (
|    |    ['0'] = String(18) "register_user_name"
|    |    ['1'] = String(5) "r_u_n"
|    |    ['2'] = String(10) "user_alias"
|    |    ['3'] = String(12) "nickusername"
|    )
|    ['1'] = Boolean(0) FALSE
)

 

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I edited my post above with what the actual serialized data should have been (your's is in valid.)

 

Any chance you did some kind of global search/replace/update query on the data to change the f_names, without actually re-serializing the data to match?

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