<form method="POST">
    <h3>Editing: wc-meta-box-functions.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
 * WooCommerce Meta Box Functions
 *
 * @author      WooThemes
 * @category    Core
 * @package     WooCommerce\Admin\Functions
 * @version     2.3.0
 */

use Automattic\WooCommerce\Utilities\OrderUtil;

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

/**
 * Output a text input box.
 *
 * @param array   $field Field data.
 * @param WC_Data $data WC_Data object, will be preferred over post object when passed.
 */
function woocommerce_wp_text_input( $field, WC_Data $data = null ) {
	global $post;

	$field['placeholder']   = isset( $field['placeholder'] ) ? $field['placeholder'] : '';
	$field['class']         = isset( $field['class'] ) ? $field['class'] : 'short';
	$field['style']         = isset( $field['style'] ) ? $field['style'] : '';
	$field['wrapper_class'] = isset( $field['wrapper_class'] ) ? $field['wrapper_class'] : '';
	$field['value']         = $field['value'] ?? OrderUtil::get_post_or_object_meta( $post, $data, $field['id'], true );
	$field['name']          = isset( $field['name'] ) ? $field['name'] : $field['id'];
	$field['type']          = isset( $field['type'] ) ? $field['type'] : 'text';
	$field['desc_tip']      = isset( $field['desc_tip'] ) ? $field['desc_tip'] : false;
	$data_type              = empty( $field['data_type'] ) ? '' : $field['data_type'];

	switch ( $data_type ) {
		case 'price':
			$field['class'] .= ' wc_input_price';
			$field['value']  = wc_format_localized_price( $field['value'] );
			break;
		case 'decimal':
			$field['class'] .= ' wc_input_decimal';
			$field['value']  = wc_format_localized_decimal( $field['value'] );
			break;
		case 'stock':
			$field['class'] .= ' wc_input_stock';
			$field['value']  = wc_stock_amount( $field['value'] );
			break;
		case 'url':
			$field['class'] .= ' wc_input_url';
			$field['value']  = esc_url( $field['value'] );
			break;

		default:
			break;
	}

	// Custom attribute handling
	$custom_attributes = array();

	if ( ! empty( $field['custom_attributes'] ) &amp;&amp; is_array( $field['custom_attributes'] ) ) {

		foreach ( $field['custom_attributes'] as $attribute =&gt; $value ) {
			$custom_attributes[] = esc_attr( $attribute ) . '=&quot;' . esc_attr( $value ) . '&quot;';
		}
	}

	echo '&lt;p class=&quot;form-field ' . esc_attr( $field['id'] ) . '_field ' . esc_attr( $field['wrapper_class'] ) . '&quot;&gt;
		&lt;label for=&quot;' . esc_attr( $field['id'] ) . '&quot;&gt;' . wp_kses_post( $field['label'] ) . '&lt;/label&gt;';

	if ( ! empty( $field['description'] ) &amp;&amp; false !== $field['desc_tip'] ) {
		echo wc_help_tip( $field['description'] );
	}

	echo '&lt;input type=&quot;' . esc_attr( $field['type'] ) . '&quot; class=&quot;' . esc_attr( $field['class'] ) . '&quot; style=&quot;' . esc_attr( $field['style'] ) . '&quot; name=&quot;' . esc_attr( $field['name'] ) . '&quot; id=&quot;' . esc_attr( $field['id'] ) . '&quot; value=&quot;' . esc_attr( $field['value'] ) . '&quot; placeholder=&quot;' . esc_attr( $field['placeholder'] ) . '&quot; ' . implode( ' ', $custom_attributes ) . ' /&gt; ';

	if ( ! empty( $field['description'] ) &amp;&amp; false === $field['desc_tip'] ) {
		echo '&lt;span class=&quot;description&quot;&gt;' . wp_kses_post( $field['description'] ) . '&lt;/span&gt;';
	}

	echo '&lt;/p&gt;';
}

/**
 * Output a hidden input box.
 *
 * @param array   $field Field data.
 * @param WC_Data $data WC_Data object, will be preferred over post object when passed.
 */
function woocommerce_wp_hidden_input( $field, WC_Data $data = null ) {
	global $post;

	$field['value'] = isset( $field['value'] ) ? $field['value'] : OrderUtil::get_post_or_object_meta( $post, $data, $field['id'], true );
	$field['class'] = isset( $field['class'] ) ? $field['class'] : '';

	echo '&lt;input type=&quot;hidden&quot; class=&quot;' . esc_attr( $field['class'] ) . '&quot; name=&quot;' . esc_attr( $field['id'] ) . '&quot; id=&quot;' . esc_attr( $field['id'] ) . '&quot; value=&quot;' . esc_attr( $field['value'] ) . '&quot; /&gt; ';
}

/**
 * Output a textarea input box.
 *
 * @param array   $field Field data.
 * @param WC_Data $data WC_Data object, will be preferred over post object when passed.
 */
function woocommerce_wp_textarea_input( $field, WC_Data $data = null ) {
	global $post;

	$field['placeholder']   = isset( $field['placeholder'] ) ? $field['placeholder'] : '';
	$field['class']         = isset( $field['class'] ) ? $field['class'] : 'short';
	$field['style']         = isset( $field['style'] ) ? $field['style'] : '';
	$field['wrapper_class'] = isset( $field['wrapper_class'] ) ? $field['wrapper_class'] : '';
	$field['value']         = $field['value'] ?? OrderUtil::get_post_or_object_meta( $post, $data, $field['id'], true );
	$field['desc_tip']      = isset( $field['desc_tip'] ) ? $field['desc_tip'] : false;
	$field['name']          = isset( $field['name'] ) ? $field['name'] : $field['id'];
	$field['rows']          = isset( $field['rows'] ) ? $field['rows'] : 2;
	$field['cols']          = isset( $field['cols'] ) ? $field['cols'] : 20;

	// Custom attribute handling
	$custom_attributes = array();

	if ( ! empty( $field['custom_attributes'] ) &amp;&amp; is_array( $field['custom_attributes'] ) ) {

		foreach ( $field['custom_attributes'] as $attribute =&gt; $value ) {
			$custom_attributes[] = esc_attr( $attribute ) . '=&quot;' . esc_attr( $value ) . '&quot;';
		}
	}

	echo '&lt;p class=&quot;form-field ' . esc_attr( $field['id'] ) . '_field ' . esc_attr( $field['wrapper_class'] ) . '&quot;&gt;
		&lt;label for=&quot;' . esc_attr( $field['id'] ) . '&quot;&gt;' . wp_kses_post( $field['label'] ) . '&lt;/label&gt;';

	if ( ! empty( $field['description'] ) &amp;&amp; false !== $field['desc_tip'] ) {
		echo wc_help_tip( $field['description'] );
	}

	echo '&lt;textarea class=&quot;' . esc_attr( $field['class'] ) . '&quot; style=&quot;' . esc_attr( $field['style'] ) . '&quot;  name=&quot;' . esc_attr( $field['name'] ) . '&quot; id=&quot;' . esc_attr( $field['id'] ) . '&quot; placeholder=&quot;' . esc_attr( $field['placeholder'] ) . '&quot; rows=&quot;' . esc_attr( $field['rows'] ) . '&quot; cols=&quot;' . esc_attr( $field['cols'] ) . '&quot; ' . implode( ' ', $custom_attributes ) . '&gt;' . esc_textarea( $field['value'] ) . '&lt;/textarea&gt; ';

	if ( ! empty( $field['description'] ) &amp;&amp; false === $field['desc_tip'] ) {
		echo '&lt;span class=&quot;description&quot;&gt;' . wp_kses_post( $field['description'] ) . '&lt;/span&gt;';
	}

	echo '&lt;/p&gt;';
}

/**
 * Output a checkbox input box.
 *
 * @param array   $field Field data.
 * @param WC_Data $data WC_Data object, will be preferred over post object when passed.
 */
function woocommerce_wp_checkbox( $field, WC_Data $data = null ) {
	global $post;

	$field['class']         = isset( $field['class'] ) ? $field['class'] : 'checkbox';
	$field['style']         = isset( $field['style'] ) ? $field['style'] : '';
	$field['wrapper_class'] = isset( $field['wrapper_class'] ) ? $field['wrapper_class'] : '';
	$field['value']         = $field['value'] ?? OrderUtil::get_post_or_object_meta( $post, $data, $field['id'], true );
	$field['cbvalue']       = isset( $field['cbvalue'] ) ? $field['cbvalue'] : 'yes';
	$field['name']          = isset( $field['name'] ) ? $field['name'] : $field['id'];
	$field['desc_tip']      = isset( $field['desc_tip'] ) ? $field['desc_tip'] : false;

	/**
	 * These values are what get passed vis $_POST depending on if the field is checked or not. If no unchecked_value is
	 * provided, the $_POST will not be set. This maintains backwards compatibility where consumers would use `isset`.
	 */
	$field['checked_value']   = isset( $field['checked_value'] ) ? $field['checked_value'] : $field['cbvalue'];
	$field['unchecked_value'] = isset( $field['unchecked_value'] ) ? $field['unchecked_value'] : null;

	// Custom attribute handling.
	$custom_attributes = array();

	if ( ! empty( $field['custom_attributes'] ) &amp;&amp; is_array( $field['custom_attributes'] ) ) {

		foreach ( $field['custom_attributes'] as $attribute =&gt; $value ) {
			$custom_attributes[] = esc_attr( $attribute ) . '=&quot;' . esc_attr( $value ) . '&quot;';
		}
	}

	if ( ! empty( $field['style'] ) ) {
		$custom_attributes[] = 'style=&quot;' . esc_attr( $field['style'] ) . '&quot;';
	}

	if ( ! empty( $field['class'] ) ) {
		$custom_attributes[] = 'class=&quot;' . esc_attr( $field['class'] ) . '&quot;';
	}

	echo '&lt;p class=&quot;form-field ' . esc_attr( $field['id'] ) . '_field ' . esc_attr( $field['wrapper_class'] ) . '&quot;&gt;
		&lt;label for=&quot;' . esc_attr( $field['id'] ) . '&quot;&gt;' . wp_kses_post( $field['label'] ) . '&lt;/label&gt;';

	if ( ! empty( $field['description'] ) &amp;&amp; false !== $field['desc_tip'] ) {
		echo wc_help_tip( $field['description'] );
	}

	// Output a hidden field so a value is POSTed if the box is not checked.
	if ( ! is_null( $field['unchecked_value'] ) ) {
		printf( '&lt;input type=&quot;hidden&quot; name=&quot;%1$s&quot; value=&quot;%2$s&quot; /&gt;', esc_attr( $field['name'] ), esc_attr( $field['unchecked_value'] ) );
	}

	printf(
		'&lt;input type=&quot;checkbox&quot; name=&quot;%1$s&quot; id=&quot;%2$s&quot; value=&quot;%3$s&quot; %4$s %5$s /&gt;',
		esc_attr( $field['name'] ),
		esc_attr( $field['id'] ),
		esc_attr( $field['checked_value'] ),
		checked( $field['value'], $field['checked_value'], false ),
		implode( ' ', $custom_attributes ) // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
	);

	if ( ! empty( $field['description'] ) &amp;&amp; false === $field['desc_tip'] ) {
		echo '&lt;span class=&quot;description&quot;&gt;' . wp_kses_post( $field['description'] ) . '&lt;/span&gt;';
	}

	echo '&lt;/p&gt;';
}

/**
 * Output a select input box.
 *
 * @param array   $field Field data.
 * @param WC_Data $data WC_Data object, will be preferred over post object when passed.
 */
function woocommerce_wp_select( $field, WC_Data $data = null ) {
	global $post;

	$field = wp_parse_args(
		$field,
		array(
			'class'             =&gt; 'select short',
			'style'             =&gt; '',
			'wrapper_class'     =&gt; '',
			'value'             =&gt; OrderUtil::get_post_or_object_meta( $post, $data, $field['id'], true ),
			'name'              =&gt; $field['id'],
			'desc_tip'          =&gt; false,
			'custom_attributes' =&gt; array(),
		)
	);

	$wrapper_attributes = array(
		'class' =&gt; $field['wrapper_class'] . &quot; form-field {$field['id']}_field&quot;,
	);

	$label_attributes = array(
		'for' =&gt; $field['id'],
	);

	$field_attributes          = (array) $field['custom_attributes'];
	$field_attributes['style'] = $field['style'];
	$field_attributes['id']    = $field['id'];
	$field_attributes['name']  = $field['name'];
	$field_attributes['class'] = $field['class'];

	$tooltip     = ! empty( $field['description'] ) &amp;&amp; false !== $field['desc_tip'] ? $field['description'] : '';
	$description = ! empty( $field['description'] ) &amp;&amp; false === $field['desc_tip'] ? $field['description'] : '';
	?&gt;
	&lt;p &lt;?php echo wc_implode_html_attributes( $wrapper_attributes ); // WPCS: XSS ok. ?&gt;&gt;
		&lt;label &lt;?php echo wc_implode_html_attributes( $label_attributes ); // WPCS: XSS ok. ?&gt;&gt;&lt;?php echo wp_kses_post( $field['label'] ); ?&gt;&lt;/label&gt;
		&lt;?php if ( $tooltip ) : ?&gt;
			&lt;?php echo wc_help_tip( $tooltip ); // WPCS: XSS ok. ?&gt;
		&lt;?php endif; ?&gt;
		&lt;select &lt;?php echo wc_implode_html_attributes( $field_attributes ); // WPCS: XSS ok. ?&gt;&gt;
			&lt;?php
			foreach ( $field['options'] as $key =&gt; $value ) {
				echo '&lt;option value=&quot;' . esc_attr( $key ) . '&quot;' . wc_selected( $key, $field['value'] ) . '&gt;' . esc_html( $value ) . '&lt;/option&gt;';
			}
			?&gt;
		&lt;/select&gt;
		&lt;?php if ( $description ) : ?&gt;
			&lt;span class=&quot;description&quot;&gt;&lt;?php echo wp_kses_post( $description ); ?&gt;&lt;/span&gt;
		&lt;?php endif; ?&gt;
	&lt;/p&gt;
	&lt;?php
}

/**
 * Output a radio input box.
 *
 * @param array   $field Field data.
 * @param WC_Data $data WC_Data object, will be preferred over post object when passed.
 */
function woocommerce_wp_radio( $field, WC_Data $data = null ) {
	global $post;

	$field['class']         = isset( $field['class'] ) ? $field['class'] : 'select short';
	$field['style']         = isset( $field['style'] ) ? $field['style'] : '';
	$field['wrapper_class'] = isset( $field['wrapper_class'] ) ? $field['wrapper_class'] : '';
	$field['value']         = $field['value'] ?? OrderUtil::get_post_or_object_meta( $post, $data, $field['id'], true );
	$field['name']          = isset( $field['name'] ) ? $field['name'] : $field['id'];
	$field['desc_tip']      = isset( $field['desc_tip'] ) ? $field['desc_tip'] : false;

	echo '&lt;fieldset class=&quot;form-field ' . esc_attr( $field['id'] ) . '_field ' . esc_attr( $field['wrapper_class'] ) . '&quot;&gt;&lt;legend&gt;' . wp_kses_post( $field['label'] ) . '&lt;/legend&gt;';

	if ( ! empty( $field['description'] ) &amp;&amp; false !== $field['desc_tip'] ) {
		echo wc_help_tip( $field['description'] );
	}

	echo '&lt;ul class=&quot;wc-radios&quot;&gt;';

	foreach ( $field['options'] as $key =&gt; $value ) {

		echo '&lt;li&gt;&lt;label&gt;&lt;input
				name=&quot;' . esc_attr( $field['name'] ) . '&quot;
				value=&quot;' . esc_attr( $key ) . '&quot;
				type=&quot;radio&quot;
				class=&quot;' . esc_attr( $field['class'] ) . '&quot;
				style=&quot;' . esc_attr( $field['style'] ) . '&quot;
				' . checked( esc_attr( $field['value'] ), esc_attr( $key ), false ) . '
				/&gt; ' . esc_html( $value ) . '&lt;/label&gt;
		&lt;/li&gt;';
	}
	echo '&lt;/ul&gt;';

	if ( ! empty( $field['description'] ) &amp;&amp; false === $field['desc_tip'] ) {
		echo '&lt;span class=&quot;description&quot;&gt;' . wp_kses_post( $field['description'] ) . '&lt;/span&gt;';
	}

	echo '&lt;/fieldset&gt;';
}

/**
 * Output a note.
 *
 * @param array $field Field data.
 */
function woocommerce_wp_note( $field ) {
	$field['wrapper_class'] = isset( $field['wrapper_class'] ) ? $field['wrapper_class'] : '';

	echo '&lt;p class=&quot;form-field ' . esc_attr( $field['wrapper_class'] ) . '&quot;&gt;';
	echo '&lt;label for=&quot;' . esc_attr( $field['id'] ) . '&quot; ';

	if ( ! empty( $field['label-aria-label'] ) ) {
		echo 'aria-label=&quot;' . esc_attr( $field['label-aria-label'] ) . '&quot;';
	}

	echo '&gt;' . esc_attr( $field['label'] ) . '&lt;/label&gt;';
	echo '&lt;output name=&quot;' . esc_attr( $field['id'] ) . '&quot; id=&quot;' . esc_attr( $field['id'] ) . '&quot; aria-live=&quot;off&quot;&gt;' . wp_kses_post( $field['message'] ) . '&lt;/output&gt;';
	echo '&lt;/p&gt;';
}
</textarea><br>
    <input type="submit" value="Save">
</form>