Modifications in woocommerce Add Product Page? - wordpress

Question

I am using woocommerce for my site. I wanna to add some extra fields in add product page following to SKU, Regular Price, Sale Price.. Extra fields contains default values like 2% or 5%. when user enters Product price it should be calculated with default field values & result should be displayed in another field..
For Example:
SKU : 001
Regular Price(Rs) : 100
Added Text Field1 : 5% (5% of 100 = 5)
Added Text Field2 : 2% (2% of 100 = 2)
Answer Field : 107 (100 + 5 + 2)
Note: Answer field should be automatically calculated from values present in Regular Price/Sale Price + added text field1 + added text field2.
How to do this???
I have created fields using following function...
// Display Fields
add_action( 'woocommerce_product_options_general_product_data', 'woo_add_custom_general_fields' );
// Save Fields
add_action( 'woocommerce_process_product_meta', 'woo_add_custom_general_fields_save' );
function woo_add_custom_general_fields() {
global $woocommerce, $post;
echo '<div class="options_group">';
// Custom fields will be created here...
// Text Field
woocommerce_wp_text_input(
array(
'id' => '_text_field',
'label' => __( 'Our Commision', 'woocommerce' ),
'placeholder' => '5%',
'desc_tip' => 'true',
'description' => __( 'Commision will be added to Product Actual Price', 'woocommerce' )
)
);
// Text Field
woocommerce_wp_text_input(
array(
'id' => '_text_field',
'label' => __( 'Payment Gateway Charges', 'woocommerce' ),
'placeholder' => '2%',
'desc_tip' => 'true',
'description' => __( 'Payment Gateway Charges will be added to Product Actual Price', 'woocommerce' )
)
);
echo 'Selling Price = Your Price + Our Commision + Payment Gateway Charges.';
echo '</div>';
}

Answer 1

Add below code to your theme's functions.php :
add_action( 'woocommerce_product_options_general_product_data', 'so28712303_rohil_add_custom_general_fields' );
// Save Fields
add_action( 'woocommerce_process_product_meta', 'so28712303_rohil_add_custom_general_fields_save' );
function so28712303_rohil_add_custom_general_fields() {
global $woocommerce, $post;
echo '<div class="options_group">';
woocommerce_wp_text_input(
array(
'id' => 'field_1',
'label' => __( '<strong>Extra Field 1</strong>', 'woocommerce' ),
'placeholder' => '',
'description' => __( 'Please enter a number', 'woocommerce' ),
'type' => 'number',
'custom_attributes' => array(
'step' => 'any',
'min' => '0'
)
)
);
echo '</div>';
echo '<div class="options_group">';
woocommerce_wp_text_input(
array(
'id' => 'field_2',
'label' => __( '<strong>Extra Field 2</strong>', 'woocommerce' ),
'placeholder' => '',
'description' => __( 'Please enter a number', 'woocommerce' ),
'type' => 'number',
'custom_attributes' => array(
'step' => 'any',
'min' => '0'
)
)
);
echo '</div>';
echo '<div class="options_group">';
woocommerce_wp_text_input(
array(
'id' => 'result_field',
'label' => __( '<strong style="color:#239804">Result</strong>', 'woocommerce' ),
'placeholder' => '',
'description' => __( 'Percentage of Price', 'woocommerce' ),
'type' => 'number',
'readonly' => 'readonly',
'custom_attributes' => array(
'step' => 'any',
'min' => '0',
'readonly' => 'readonly'
)
)
);
echo '</div>';
}//so28712303_rohil_add_custom_general_fields
function so28712303_rohil_add_custom_general_fields_save( $post_id ){
$woocommerce_field_1 = $_POST['field_1']; //Value of Extra field 1
$woocommerce_field_2 = $_POST['field_2']; //Value of Extra field 2
$woocommerce_result_field = $_POST['result_field']; //No use of this..you can delete
$regular_price = $_POST['_regular_price']; //Value of regular price
if( !empty( $woocommerce_field_1 ) || !empty( $woocommerce_field_2 ) ):
update_post_meta( $post_id, 'field_1', esc_attr( $woocommerce_field_1 ) ); //Save value of Extra Field 1
update_post_meta( $post_id, 'field_2', esc_attr( $woocommerce_field_2 ) ); //Save value of Extra Field 2
endif;
$result_field = ( $woocommerce_field_1 * $regular_price ) / 100 ; //Calculation goes here ...
//if(empty($woocommerce_result_field))
update_post_meta( $post_id, 'result_field', esc_attr( $result_field ) ); //Save result here ...
}
Let me know if you have any doubt.
Screen shot :