Conditional Fields for Contact Form 7

https://wordpress.org/plugins/cf7-conditional-fields/

add input field in wp admin and Global Options Page and custom form in wp admin

http://stackoverflow.com/questions/11715465/how-do-i-create-a-universal-custom-field-in-wordpress

/** EGR Magnificent config in wp-admin */
add_action( 'admin_menu', 'my_plugin_menu' );

function my_plugin_menu() {
add_options_page( 'Magnificent', 'Magnificent API', 'manage_options', 'magnificent-config', 'EGR_magnificent_options' );
}

function EGR_magnificent_options() {
if ( !current_user_can( 'manage_options' ) )  {
wp_die( __( 'You do not have sufficient permissions to access this page.' ) );
}
echo '<div class="wrap">';
echo '<p>EGR Magnificent API configuration.</p><form method="post" action="options.php">';
             wp_nonce_field('update-options');
    echo '   <p><strong>JWT token secret key:</strong><br />
                <input type="text" name="jwtsecret" size="45" value="'; echo get_option('jwtsecret');
                echo '" />
                <br /><strong>JWT token expiry time (in minutes):</strong><br />
                <input type="number" name="jwtexpire" size="45" value="'; echo get_option('jwtexpire');
                echo '" />
            </p>
            <p><input type="submit" name="Submit" value="Store Options" /></p>
            <input type="hidden" name="action" value="update" />
            <input type="hidden" name="page_options" value="jwtsecret, jwtexpire" />
        </form>';
echo '</div>';
}

Add custom taxonomy type under post with form

REF : https://metabox.io/plugins/custom-taxonomy/


// Post Stock box
add_action( 'add_meta_boxes', 'post_stock' );
function post_stock() {
   add_meta_box(
       'post_stock',
       __( 'Stock', 'agrg' ),
       'post_stock_content',
       'post',
       'side',
       'high'
   );
}

function post_stock_content( $post ) {
wp_nonce_field( 'myplugin_meta_boxee', 'myplugin_meta_box_nonceee' );
$post_stock = get_post_meta( $post->ID, 'post_stock', true );

echo '<label for="post_stock"></label>';
echo '<input type="text" id="post_stock" name="post_stock" placeholder="'._e('Enter Stock here','agrg').'" value="';
echo $post_stock;
echo '">';

}

add_action( 'save_post', 'post_stock_save' );
function post_stock_save( $post_id ) {
global $post_stock;
if ( ! isset( $_POST['myplugin_meta_box_nonceee'] ) ) {
return;
}
if ( ! wp_verify_nonce( $_POST['myplugin_meta_box_nonceee'], 'myplugin_meta_boxee' ) ) {
return;
}
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
return;
}

if(isset($_POST["post_stock"]))
$post_stock = $_POST['post_stock'];
update_post_meta( $post_id, 'post_stock', $post_stock );

}


$stock_labels = array(
            'name' => __( 'Stock', 'agrg' ),
            'singular_name' => __( 'Stock', 'agrg' ),
            'search_items' =>  __( 'Search Stocks', 'agrg' ),
            'popular_items' => __( 'Popular Stocks', 'agrg' ),
            'all_items' => __( 'All Stocks', 'agrg' ),
            'parent_item' => __( 'Parent Stock', 'agrg' ),
            'parent_item_colon' => __( 'Parent Stock:', 'agrg' ),
            'edit_item' => __( 'Edit Stock', 'agrg' ),
            'update_item' => __( 'Update Stock', 'agrg' ),
            'add_new_item' => __( 'Add New Stock', 'agrg' ),
            'new_item_name' => __( 'New Stock Name', 'agrg' ),
            'separate_items_with_commas' => __( 'Separate Stocks with commas', 'agrg' ),
            'add_or_remove_items' => __( 'Add or remove Stock', 'agrg' ),
            'choose_from_most_used' => __( 'Choose from the most used Stocks', 'agrg' ),
            'menu_name' => __( 'Stocks', 'agrg' )
        );
register_taxonomy("Stock",
array("post"),
array("hierarchical" => true,
'labels' => $stock_labels,
'show_ui' => true,
                'query_var' => true,
                'rewrite' => array('slug' => __('Stock', 'agrg'))
)
);


Add value in custom taxonomy pro-grammatically :

REF: https://codex.wordpress.org/Function_Reference/wp_insert_term

/* Location update while seller registration */
$saddress = sanitize_text_field($address);
//check location is exist
$loc_exist = term_exists( $saddress ); // array is returned if taxonomy is given

if (empty($loc_exist) ) {

$parent_term = term_exists( 'location' ); // array is returned if taxonomy is given
       $parent_term_id = $parent_term['term_id']; // get numeric term id
wp_insert_term(
 $saddress, // the term
 'location', // the taxonomy
 array(
   'description'=> 'A seller location.',
   'slug' => $saddress,
   'parent'=> $parent_term_id
                   )
    );
}

Custom validation in contact form 7

function.php :


/** text validation for contact form 7 **/
add_filter( 'wpcf7_validate_text*', 'custom_text_confirmation_validation_filter', 20, 2 );

function custom_text_confirmation_validation_filter( $result, $tag ) {
    $tag = new WPCF7_Shortcode( $tag );

    if ( 'your-name' == $tag->name ) {
        $your_name = isset( $_POST['your-name'] ) ? trim( $_POST['your-name'] ) : '';
//remove space from string
$trim_name = str_replace(' ', '', $your_name);
//special char validation
        if ( $your_name ) {
if (preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $your_name) || ! ctype_alpha($trim_name) )
{
   $result->invalidate( $tag, "Name seems invalid." );
}          
        }
    }

    return $result;
}

/** URL validation for contact form 7 **/
function cf7_custom_url_check( $result, $url )
{
  if ($result)
  {
    $regex='@^(https?\://)?(www\.)?([a-z0-9]([a-z0-9]|(\-[a-z0-9]))*\.)+[a-z]+$@i';
    if (!preg_match($regex,$url)) $result=FALSE;
  }
  return $result;
}
add_filter( 'wpcf7_is_url', 'cf7_custom_url_check', 10, 2 );