如果用户角色是某个角色，则隐藏HTML块

我正在尝试在我们的网站上实现一个功能，用户可以通过单击团队页面上的按钮加入团队（团队是在用户角色编辑器中设置的自定义角色）。但是，如果用户已经是该团队的成员，我不希望为他们显示该按钮。

我已经有了使某人能够加入团队的代码：

<?php

add_shortcode( \'select_marketing\', \'select_marketing\' );
function select_marketing() {

    // Stop if user is not logged in.
    if ( ! is_user_logged_in() )
        return;

    ob_start();

    ?>

<form method="post" action="">
    <button class="btn btn-default" type="submit" name="role" value="marketing">Join this Team</button>
</form>

    <?php

    // Do not process anything if it\'s not $_POST
    if ( ! isset( $_POST[\'role\'] ) )
        return;

    // Never trust user input.
    $role = sanitize_key( $_POST[\'role\'] );
    if ( ! in_array( $role, array( \'marketing\', ) ) )
        return;

    // Get the user object
    $user = new WP_User( get_current_user_id() );
    $index = key( $user->roles );
    $user_role = $user->roles[ $index ];

    // User already got that user
    if ( $user_role == $role ) {

        echo sprintf( __( \'You already have %s role.\' ), $role );

    } else {

        // update user role
        $user->set_role( $role );
        echo sprintf( __( \'Your role was changed to %s.\' ), $role );

    }

    $output = ob_get_contents();
    ob_end_clean();
    return $output;
}

?>

然而，就我的一生而言，我无法想出如何隐藏一个特定角色的按钮，在上面的示例中，它将是营销角色。

如果有人能帮我一把，我将不胜感激。

哦，如果有更优雅的方法来完成我正在努力实现的目标，请随时告诉我。我对wordpress和php很陌生。

以上代码在此帖子中稍作修改：How to allow registered users to change their user role through frontend?

<?php add_shortcode( \'change_department\', \'change_department_func\' ); /* This would be called from page content with a parameter for \'change_role\' e.g [change_department change_role="fnc"] */ function change_department_func( $atts ) { //the parameters seem to work is that they all get //put into an array - so here we extract the change_role param. //this variable holds the value of the role that we will change the //user to when they click the change role button. //e.g. fnc - would be the role for finance. $change_role = $atts[\'change_role\']; // Stop if user is not logged in. if ( ! is_user_logged_in() ) return; ob_start(); // Get the user object $user = new WP_User( get_current_user_id() ); //get the users current role $index = key( $user->roles ); $user_role = $user->roles[ $index ]; if ( $user_role == $change_role || isset($_POST[\'role\']) ) { // User already got that role so no need for a button } else { //user doesn\'t already have the role so we create a role setting button //on the page for them to click if they want echo " <form id=\'join\' method=\'post\' action=\'\'> <button class=\'btn btn-default\' type=\'submit\' name=\'role\' >Join this Team</button> </form>"; } if(isset($_POST[\'role\'])) { //this will be set if the page is loaded after the user clicks the button //so in this case we set the users role to be the value we got from //the parameter array $user = new WP_User( get_current_user_id() ); $index = key( $user->roles ); $user_role = $user->roles[ $index ]; $user->set_role( $change_role ); } $output = ob_get_contents(); ob_end_clean(); return $output; } ?>

// Get the user object $user = new WP_User( get_current_user_id() ); $index = key( $user->roles ); $user_role = $user->roles[ $index ]; // User already got that user if ( $user_role == $role ) { echo sprintf( __( \'You already have %s role.\' ), $role ); } else { // update user role $user->set_role( $role ); echo sprintf( __( \'Your role was changed to %s.\' ), $role ); }

//Get the user $user = wp_get_current_user(); // User already got this role if( $user->has_cap( $role ) ) { echo sprintf( __( \'You already have %s role.\' ), $role ); // Do whatever you want } else { // update user role $user->set_role( $role ); echo sprintf( __( \'Your role was changed to %s.\' ), $role ); }

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