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function add_query_arg() {
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        $ret = '';
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        if ( is_array( func_get_arg(0) ) ) {
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                if ( @func_num_args() < 2 || false === @func_get_arg( 1 ) )
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                        if ( get_bloginfo('url') != '' )
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                                $uri = bloginfo('url') . $_SERVER['REQUEST_URI'];
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                        else
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                                $uri = $_SERVER['REQUEST_URI'];
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                else
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                        $uri = @func_get_arg( 1 );
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        } else {
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                if ( @func_num_args() < 3 || false === @func_get_arg( 2 ) )
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                        if ( get_bloginfo('url') != '' )
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                                $uri = bloginfo('url') . $_SERVER['REQUEST_URI'];
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                        else
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                                $uri = $_SERVER['REQUEST_URI'];
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                else
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                        $uri = @func_get_arg( 2 );
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        }