WordPress を使用してカスタム登録フォーム プラグインを作成する方法、wordpress form_PHP チュートリアル

<span>if</span><span> ( <span>empty</span>( $username ) || <span>empty</span>( $password ) || <span>empty</span>( $email ) ) {
    $reg_errors->add(<span>'field'</span>, <span>'Required form field is missing'</span>);
}</span>

<span>if</span><span> ( 4 > strlen( $username ) ) {
    $reg_errors->add( <span>'username_length'</span>, <span>'Username too short. At least 4 characters is required'</span> );
}</span>

<span>if</span><span> ( username_exists( $username ) )
    $reg_errors->add(<span>'user_name'</span>, <span>'Sorry, that username already exists!'</span>);</span>

<span>if</span><span> ( ! validate_username( $username ) ) {
    $reg_errors->add( <span>'username_invalid'</span>, <span>'Sorry, the username you entered is not valid'</span> );
}</span>

<span>if</span><span> ( 5 > strlen( $password ) ) {
        $reg_errors->add( <span>'password'</span>, <span>'Password length must be greater than 5'</span> );
    }</span>

<span>if</span><span> ( ! <span>empty</span>( $website ) ) {
    <span>if</span> ( ! filter_var( $website, FILTER_VALIDATE_URL ) ) {
        $reg_errors->add( <span>'website'</span>, <span>'Website is not a valid URL'</span> );
    }
}</span>

<span>if</span><span> ( is_wp_error( $reg_errors ) ) {
 
    <span>foreach</span> ( $reg_errors->get_error_messages() <span>as</span> $error ) {
     
        <span>echo</span> <span>'<div>'</span>;
        <span>echo</span> <span>'<strong>ERROR</strong>:'</span>;
        <span>echo</span> $error . <span>'<br/>'</span>;
        <span>echo</span> <span>'</div>'</span>;
         
    }
 
}</span>

<span>function</span><span> complete_registration() {
    <span>global</span> $reg_errors, $username, $password, $email, $website, $first_name, $last_name, $nickname, $bio;
    <span>if</span> ( 1 > count( $reg_errors->get_error_messages() ) ) {
        $userdata = <span>array</span>(
        <span>'user_login'</span>    =>   $username,
        <span>'user_email'</span>    =>   $email,
        <span>'user_pass'</span>     =>   $password,
        <span>'user_url'</span>      =>   $website,
        <span>'first_name'</span>    =>   $first_name,
        <span>'last_name'</span>     =>   $last_name,
        <span>'nickname'</span>      =>   $nickname,
        <span>'description'</span>   =>   $bio,
        );
        $user = wp_insert_user( $userdata );
        <span>echo</span> <span>'Registration complete. Goto <a href="'</span> . get_site_url() . <span>'/wp-login.php">login page</a>.'</span>;  
    }
}</span>

<span>function</span><span> custom_registration_function() {
    <span>if</span> ( <span>isset</span>($_POST[<span>'submit'</span>] ) ) {
        registration_validation(
        $_POST[<span>'username'</span>],
        $_POST[<span>'password'</span>],
        $_POST[<span>'email'</span>],
        $_POST[<span>'website'</span>],
        $_POST[<span>'fname'</span>],
        $_POST[<span>'lname'</span>],
        $_POST[<span>'nickname'</span>],
        $_POST[<span>'bio'</span>]
        );
         
        <span>// sanitize user form input</span>
        <span>global</span> $username, $password, $email, $website, $first_name, $last_name, $nickname, $bio;
        $username   =   sanitize_user( $_POST[<span>'username'</span>] );
        $password   =   esc_attr( $_POST[<span>'password'</span>] );
        $email      =   sanitize_email( $_POST[<span>'email'</span>] );
        $website    =   esc_url( $_POST[<span>'website'</span>] );
        $first_name =   sanitize_text_field( $_POST[<span>'fname'</span>] );
        $last_name  =   sanitize_text_field( $_POST[<span>'lname'</span>] );
        $nickname   =   sanitize_text_field( $_POST[<span>'nickname'</span>] );
        $bio        =   esc_textarea( $_POST[<span>'bio'</span>] );
 
        <span>// call @function complete_registration to create the user</span>
        <span>// only when no WP_error is found</span>
        complete_registration(
        $username,
        $password,
        $email,
        $website,
        $first_name,
        $last_name,
        $nickname,
        $bio
        );
    }
 
    registration_form(
        $username,
        $password,
        $email,
        $website,
        $first_name,
        $last_name,
        $nickname,
        $bio
        );
}</span>

<span>// Register a new shortcode: [cr_custom_registration]</span><span>
add_shortcode( <span>'cr_custom_registration'</span>, <span>'custom_registration_shortcode'</span> );
 
<span>// The callback function that will replace [book]</span>
<span>function</span> custom_registration_shortcode() {
    ob_start();
    custom_registration_function();
    <span>return</span> ob_get_clean();
}</span>