From:             david at grudl dot com
Operating system: 
PHP version:      5.4.6
Package:          Variables related
Bug Type:         Bug
Bug description:foreach unexpectedly advances the internal array pointer

Description:
------------
Foreach unexpectedly advances the internal array pointer, although array is
returned by function without reference.

Test script:
---------------
<?php


class Test
{
        function run() 
        {
                $this->arr = array('item');
                var_dump(key($this->arr)); // dumps 0
                
                // this unexpectedly advances the internal array pointer
                foreach ($this->getArr() as $v) {}
                
                var_dump(key($this->arr)); // dumps NULL
        }

        function getArr()
        {
                // is NOT returned by reference
                return $this->arr;
        }

}


$test = new Test;
$test->run();


Expected result:
----------------
It dumps "0" in second time too.


-- 
Edit bug report at https://bugs.php.net/bug.php?id=62901&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=62901&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=62901&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=62901&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=62901&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=62901&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=62901&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=62901&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=62901&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=62901&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=62901&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=62901&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=62901&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=62901&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=62901&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=62901&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=62901&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=62901&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=62901&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=62901&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=62901&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=62901&r=mysqlcfg

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