Đổi số lượng sản phẩm thành dạng select cho woocommerce wordpress

function woocommerce_quantity_input($data = null) {
global $product;
if (!$data) {
$defaults = array(
'input_name'   => 'quantity',
'input_value'   => '1',
'max_value'     => apply_filters( 'woocommerce_quantity_input_max', '', $product ),
'min_value'     => apply_filters( 'woocommerce_quantity_input_min', '', $product ),
'step'         => apply_filters( 'woocommerce_quantity_input_step', '1', $product ),
'style'         => apply_filters( 'woocommerce_quantity_style', 'float:left;', $product )
);
} else {
$defaults = array(
'input_name'   => $data['input_name'],
'input_value'   => $data['input_value'],
'step'         => apply_filters( 'chowordpress_woocommerce_quantity_input_step', '1', $product ),
'max_value'     => apply_filters( 'chowordpress_woocommerce_quantity_input_max', '', $product ),
'min_value'     => apply_filters( 'chowordpress_woocommerce_quantity_input_min', '', $product ),
'style'         => apply_filters( 'chowordpress_woocommerce_quantity_style', 'float:left;', $product )
);
}
if ( ! empty( $defaults['min_value'] ) )
$min = $defaults['min_value'];
else $min = 1;
if ( ! empty( $defaults['max_value'] ) )
$max = $defaults['max_value'];
else $max = 15;
if ( ! empty( $defaults['step'] ) )
$step = $defaults['step'];
else $step = 1;
$options = '';
for ( $count = $min; $count <= $max; $count = $count+$step ) {
$selected = $count === $defaults['input_value'] ? ' selected' : '';
$options .= '<option value="' . $count . '"'.$selected.'>' . $count . '</option>';
}
echo '<div class="chowordpress_quantity_select" style="' . $defaults['style'] . '"><select name="' . esc_attr( $defaults['input_name'] ) . '" title="' . _x( 'Qty', 'Product Description', 'woocommerce' ) . '" class="chowordpress_qty">' . $options . '</select></div>';
}