How do I change button text from "Choose an option" in Woocommerce?

Question

How would I go about changing this PHP code to to change Choose an option based on the id of the select element in the Woocommerce plugin for WordPress? I believe I have found the correct PHP file in wc-template-function.php but my lack of PHP skills is holding me back. Here is what I have so far:

if ( ! function_exists( 'wc_dropdown_variation_attribute_options' ) ) {

    /**
     * Output a list of variation attributes for use in the cart forms.
     *
     * @param array $args
     * @since 2.4.0
     */
    function wc_dropdown_variation_attribute_options( $args = array() ) {
        $args = wp_parse_args( $args, array(
            'options'          => false,
            'attribute'        => false,
            'product'          => false,
            'selected'         => false,
            'name'             => '',
            'id'               => '',
            'class'            => '',
            'show_option_none' => __( 'Choose an option', 'woocommerce' ),
            'show_option_color' => __( 'Choose a color', 'woocommerce' ),
            'show_option_size' => __( 'Choose a size', 'woocommerce' )
        ) );

        $options   = $args['options'];
        $product   = $args['product'];
        $attribute = $args['attribute'];
        $name      = $args['name'] ? $args['name'] : 'attribute_' . sanitize_title( $attribute );
        $id        = $args['id'] ? $args['id'] : sanitize_title( $attribute );
        $class     = $args['class'];

        if ( empty( $options ) && ! empty( $product ) && ! empty( $attribute ) ) {
            $attributes = $product->get_variation_attributes();
            $options    = $attributes[ $attribute ];
        }

        echo '<select id="' . esc_attr( $id ) . '" class="' . esc_attr( $class ) . '" name="' . esc_attr( $name ) . '" data-attribute_name="attribute_' . esc_attr( sanitize_title( $attribute ) ) . '">';

        if ( $args['show_option_none'] ) {
            echo '<option value="">' . esc_html( $args['show_option_none'] ) . '</option>';
        }
        if ( $args['$id_colors'] ) {
            echo '<option value="">' . esc_html( $args['show_option_color'] ) . '</option>';
        }
        if ( $args['$id_sizes'] ) {
            echo '<option value="">' . esc_html( $args['show_option_size'] ) . '</option>';
        }

        if ( ! empty( $options ) ) {
            if ( $product && taxonomy_exists( $attribute ) ) {
                // Get terms if this is a taxonomy - ordered. We need the names too.
                $terms = wc_get_product_terms( $product->id, $attribute, array( 'fields' => 'all' ) );

                foreach ( $terms as $term ) {
                    if ( in_array( $term->slug, $options ) ) {
                        echo '<option value="' . esc_attr( $term->slug ) . '" ' . selected( sanitize_title( $args['selected'] ), $term->slug, false ) . '>' . apply_filters( 'woocommerce_variation_option_name', $term->name ) . '</option>';
                    }
                }
            } else {
                foreach ( $options as $option ) {
                    // This handles < 2.4.0 bw compatibility where text attributes were not sanitized.
                    $selected = sanitize_title( $args['selected'] ) === $args['selected'] ? selected( $args['selected'], sanitize_title( $option ), false ) : selected( $args['selected'], $option, false );
                    echo '<option value="' . esc_attr( $option ) . '" ' . $selected . '>' . esc_html( apply_filters( 'woocommerce_variation_option_name', $option ) ) . '</option>';
                }
            }
        }

        echo '</select>';
    }
}

You can see where I tried to add show_option_color and show_option_size in to the array and then add if statements for them, but it doesn't seem to be working. I'm not sure how to reference the id of the select element and write the if statement based on if its is the correct select element.

Here is the HTML I'm trying to target.

<select id="sizes" class="" name="attribute_sizes" data-attribute_name="attribute_sizes">Want this to say Choose a size</select>

<select id="colors" class="" name="attribute_sizes" data-attribute_name="attribute_sizes">Want this to say Choose a color</select>

variable.php code lines 27 - 38:

<?php foreach ( $attributes as $attribute_name => $options ) : ?>
                    <tr>
                        <td class="label"><label for="<?php echo sanitize_title( $attribute_name ); ?>"><?php echo wc_attribute_label( $attribute_name ); ?></label></td>
                        <td class="value">
                            <?php
                                $selected = isset( $_REQUEST[ 'attribute_' . sanitize_title( $attribute_name ) ] ) ? wc_clean( $_REQUEST[ 'attribute_' . sanitize_title( $attribute_name ) ] ) : $product->get_variation_default_attribute( $attribute_name );
                                wc_dropdown_variation_attribute_options( array( 'options' => $options, 'attribute' => $attribute_name, 'product' => $product, 'selected' => $selected ) );
                                echo end( $attribute_keys ) === $attribute_name ? '<a class="reset_variations" href="#">' . __( 'Clear selection', 'woocommerce' ) . '</a>' : '';
                            ?>
                        </td>
                    </tr>
                <?php endforeach;?>

Answer 1

I have done this using a combination of the other answers here and it worked well for me.

This was done using WooCoommerce 3.3.5 and assume the filter was added relatively recently.

You use the filter for the wc_dropdown_variation_attribute_options() function.

// define the woocommerce_dropdown_variation_attribute_options_args callback 
function filter_woocommerce_dropdown_variation_attribute_options_args( $array ) { 

    // Find the name of the attribute for the slug we passed in to the function
    $attribute_name = wc_attribute_label($array['attribute']);

    // Create a string for our select
    $select_text = 'Select a ' . $attribute_name;

    $array['show_option_none'] = __( $select_text, 'woocommerce' );
    return $array; 
}; 

// add the filter 
add_filter( 'woocommerce_dropdown_variation_attribute_options_args', 'filter_woocommerce_dropdown_variation_attribute_options_args', 10, 1 ); 

Hope this helps someone.