add_user_meta and update_user_meta working only sporadically

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I’m trying to display something to my wordpress site users depending on the number of times they have logged in. I’ve tried to accomplish this using user_meta and the wp_login hook. 

add_action( 'wp_login', 'survey_login' );
function survey_login() {
    global $current_user;
    get_currentuserinfo();
    $login_count = get_user_meta($current_user->ID, 'login_count', true);

    if($login_count == "") { $login_count = 0; }

    update_user_meta($current_user->ID, "login_count", $login_count++ );

    if($login_count >= 5) {
        $_SESSION['csm_survey_login'] = true;
    }
}

This seems like it should work, but for some reason the user_meta key only gets added/updated about 1/20th of the time. I’ve been able to find no pattern to how or why.

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I’ve tried simplifying the function to simply 

add_user_meta($current_user->ID, 'login_count', 1);

Or 

update_user_meta($current_user->ID, 'login_count', 1);

Both are giving me the same trouble.

Anyone know why update_user_meta or wp_login may only work a fraction of the time?

Post Views: 3

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2 comments

  1. The first time this is loaded the meta key won’t exist, if a meta key can’t be found the function with return false not an empty string, and you can’t increment false. Don’t use empty() as this will return true for 0, but to test for false instead of an empty string use:

    add_action( 'wp_login', 'survey_login' );
function survey_login() {
    global $current_user;
    get_currentuserinfo();

    // Get meta key, returns false if it doesn't exist
    $login_count = get_user_meta( $current_user->ID, 'login_count', true );

    // Test for false and set to default
    if ( false === $login_count ){
        $login_count = 0;
    }

    // Increment and update
    update_user_meta( $current_user->ID, "login_count", ++$login_count );

    if( $login_count >= 5 ) {
        $_SESSION['csm_survey_login'] = true;
    }
}

  2. The problem is with your incrementing. $login_count++ returns the current value of $login_count and then increments. You want ++$login_count which returns the incremented value.

    add_action( 'wp_login', 'survey_login' );
function survey_login() {
    global $current_user;
    get_currentuserinfo();
    $login_count = get_user_meta($current_user->ID, 'login_count', true);

    if($login_count == "") { $login_count = 0; }

    update_user_meta($current_user->ID, "login_count", ++$login_count );

    if($login_count >= 5) {
        $_SESSION['csm_survey_login'] = true;
    }
}

    Cheers.