闭包会导致php-5.2中的语法错误

preg_match_all(\"/\'(.+)\' ((\\w+)\\(? ?(\\d*) ?\\)?)/\", $sql, $_matches, PREG_SET_ORDER);
$matches = array_map(function($v) {return array(trim($v[2]), $v[1]);}, $_matches);

Parse error: syntax error, unexpected T_FUNCTION, expecting \')\' in SqlParser.php on line 29

function map_cb($v){
    return array(trim($v[2]), $v[1]);
}


preg_match_all(\"/\'(.+)\' ((\\w+)\\(? ?(\\d*) ?\\)?)/\", $sql, $_matches, PREG_SET_ORDER);
$matches = array_map(\"map_cb\", $_matches);

create_function()