From:             
Operating system: Ubuntu
PHP version:      Irrelevant
Package:          Arrays related
Bug Type:         Bug
Bug description:array_keys convert keys type

Description:
------------
I noticed when I extract the keys of an array using array_keys, if a key is
an string with a number, on the resulting array from the array_keys
execution I get an integer for this key instead of a string.

My version of PHP is 5.3.5-1ubuntu7.3.

Regards!

Test script:
---------------
$a = array(
        '1' => 'apple',
        '2' => 'banana',
        '3' => 'orange',
        '4' => 'stawberry',
);
$keys = array_keys($a);
echo gettype( $keys[0] );

Expected result:
----------------
Output:

string

Actual result:
--------------
Output

integer

-- 
Edit bug report at https://bugs.php.net/bug.php?id=60426&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=60426&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=60426&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=60426&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=60426&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=60426&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=60426&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=60426&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=60426&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=60426&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=60426&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=60426&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=60426&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=60426&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=60426&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=60426&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=60426&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=60426&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=60426&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=60426&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=60426&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=60426&r=mysqlcfg

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