Description:
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Would be good to have a possibility to extract array elements by ref like in test 
script.

Test script:
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$arr = array( 1, 2 );
list( &$first, &$second ) = $arr;

++$first;
--$second;

print_r( $arr);

Expected result:
----------------
array( 2, 1 )

Actual result:
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PHP Parse error:  syntax error, unexpected '&', expecting ',' or ')' in ... on 
line 2