How to add custom filed and save it in wordpress? - wordpress

Question

Following code I tried out But it is not save value of custom Fileds.
add_action( 'add_meta_boxes', 'cd_meta_box_add' );
function cd_meta_box_add()
{
add_meta_box( 'my-meta-box-id', 'My First Meta Box', 'cd_meta_box_cb', 'product', 'side', 'high' );
}
In above I have add code it is display when posttype is product
function cd_meta_box_cb( $product)
{
$values = get_post_custom( $product->ID );
$text = isset( $values['my_meta_box_text'] ) ? esc_attr($values['my_meta_box_text'][0] ) : ”;
?>
<p>
<label for="my_meta_box_text">Text Label</label>
<input type="text" name="my_meta_box_text" id="my_meta_box_text" value="<?php echo $text; ?>" />
</p>
<?php
}
In above code it will added the metabox with textbox and if value in metabox then it is display
add_action( 'save_post', 'cd_meta_box_save' );
function cd_meta_box_save( $product_id )
{
// Bail if we're doing an auto save
if( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
// if our nonce isn't there, or we can't verify it, bail
if( !isset( $_POST['meta_box_nonce'] ) || !wp_verify_nonce( $_POST['meta_box_nonce'], 'my_meta_box_nonce' ) ) return;
// if our current user can't edit this post, bail
if( !current_user_can( 'edit_post' ) ) return;
}
I want to save data in a wp_postmeta table. Above code i have tried out. I am beginner in wordpress.Can any give me suggestion ?

Answer 1

Use This code for creating custom fields for post.
class Rational_Meta_Box {
private $screens = array(
'post',
);
private $fields = array(
array(
'id' => 'custom-field-1',
'label' => 'custom field 1',
'type' => 'text',
),
array(
'id' => 'custom-field-2',
'label' => 'custom field 2',
'type' => 'text',
),
);
/**
* Class construct method. Adds actions to their respective WordPress hooks.
*/
public function __construct() {
add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ) );
add_action( 'save_post', array( $this, 'save_post' ) );
}
/**
* Hooks into WordPress' add_meta_boxes function.
* Goes through screens (post types) and adds the meta box.
*/
public function add_meta_boxes() {
foreach ( $this->screens as $screen ) {
add_meta_box(
'my-custom-fields',
__( 'my custom fields', 'wordpress' ),
array( $this, 'add_meta_box_callback' ),
$screen,
'advanced',
'high'
);
}
}
/**
* Generates the HTML for the meta box
*
* #param object $post WordPress post object
*/
public function add_meta_box_callback( $post ) {
wp_nonce_field( 'my_custom_fields_data', 'my_custom_fields_nonce' );
echo 'its for custom fields for post typle';
$this->generate_fields( $post );
}
/**
* Generates the field's HTML for the meta box.
*/
public function generate_fields( $post ) {
$output = '';
foreach ( $this->fields as $field ) {
$label = '<label for="' . $field['id'] . '">' . $field['label'] . '</label>';
$db_value = get_post_meta( $post->ID, 'my_custom_fields_' . $field['id'], true );
switch ( $field['type'] ) {
default:
$input = sprintf(
'<input %s id="%s" name="%s" type="%s" value="%s">',
$field['type'] !== 'color' ? 'class="regular-text"' : '',
$field['id'],
$field['id'],
$field['type'],
$db_value
);
}
$output .= $this->row_format( $label, $input );
}
echo '<table class="form-table"><tbody>' . $output . '</tbody></table>';
}
/**
* Generates the HTML for table rows.
*/
public function row_format( $label, $input ) {
return sprintf(
'<tr><th scope="row">%s</th><td>%s</td></tr>',
$label,
$input
);
}
/**
* Hooks into WordPress' save_post function
*/
public function save_post( $post_id ) {
if ( ! isset( $_POST['my_custom_fields_nonce'] ) )
return $post_id;
$nonce = $_POST['my_custom_fields_nonce'];
if ( !wp_verify_nonce( $nonce, 'my_custom_fields_data' ) )
return $post_id;
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
return $post_id;
foreach ( $this->fields as $field ) {
if ( isset( $_POST[ $field['id'] ] ) ) {
switch ( $field['type'] ) {
case 'email':
$_POST[ $field['id'] ] = sanitize_email( $_POST[ $field['id'] ] );
break;
case 'text':
$_POST[ $field['id'] ] = sanitize_text_field( $_POST[ $field['id'] ] );
break;
}
update_post_meta( $post_id, 'my_custom_fields_' . $field['id'], $_POST[ $field['id'] ] );
} else if ( $field['type'] === 'checkbox' ) {
update_post_meta( $post_id, 'my_custom_fields_' . $field['id'], '0' );
}
}
}
}
new Rational_Meta_Box;
So it will create custom fields in your post type and also saved it too.
follow this for the references https://developer.wordpress.org/plugins/metadata/creating-custom-meta-boxes/

Answer 2

Just replace your add_action( 'save_post', 'cd_meta_box_save' ); function and put below code.
add_action( 'save_post', 'cd_meta_box_save' );
function cd_meta_box_save( $product_id )
{
if( isset( $_POST[ 'my_meta_box_text' ] ) ) {
update_post_meta( $product_id,'my_meta_box_text', $_POST['my_meta_box_text'] );
}
}
Full code like ( it's working fine and also save custom field in postmeta table)
add_action( 'add_meta_boxes', 'cd_meta_box_add' );
function cd_meta_box_add()
{
add_meta_box( 'my-meta-box-id', 'My First Meta Box', 'cd_meta_box_cb', 'post', 'side', 'high' );
}
function cd_meta_box_cb( $product)
{
$values = get_post_custom( $product->ID );
$text = isset( $values['my_meta_box_text'] ) ? esc_attr($values['my_meta_box_text'][0] ) : '';
?>
<p>
<label for="my_meta_box_text">Text Label</label>
<input type="text" name="my_meta_box_text" id="my_meta_box_text" value="<?php echo $text; ?>" />
</p>
<?php
}
add_action( 'save_post', 'cd_meta_box_save' );
function cd_meta_box_save( $product_id )
{
if( isset( $_POST[ 'my_meta_box_text' ] ) ) {
update_post_meta( $product_id,'my_meta_box_text', $_POST['my_meta_box_text'] );
}
}

Answer 3

Take a look at Pods.
It is a very powerful plugin for customization.
http://pods.io/