Get current logged in user details in buddypress OR get profile field data for loggin user

//get login user sex
global $bp;
$the_user_id = $bp->loggedin_user->userdata->ID;
$loginUserSex = bp_get_profile_field_data( 'field=sex&user_id=' . $the_user_id );

dynamically add username in the URL

/* dynamically add username in the URL
 ================================================== */
add_filter( 'nav_menu_link_attributes', 'menu_override', 10, 3 );
function menu_override( $atts, $item, $args ) {
    $user = wp_get_current_user();
    $newlink = str_replace("--username--", $user->user_login, $atts['href']);
    $atts[href] = $newlink;
    return $atts;
}

set profile data for a specific field for a specific user. OR update user extend profile fields

http://buddypress.wp-a2z.org/oik_api/xprofile_set_field_data/

                $interest = isset($_POST['interest'])?$_POST['interest']:''; //value
                $field = 'Interest'; // field name
$field_id = xprofile_get_field_id_from_name( $field );
$field           = new BP_XProfile_ProfileData();
$field->field_id = $field_id;
$field->user_id  = $user_id;
$field->value    = maybe_serialize( $interest );
$field->save();

function xprofile_set_field_data( $field, $user_id, $value, $is_required = false ) {

  if ( is_numeric( $field ) ) {
    $field_id = $field;
  } else {
    $field_id = xprofile_get_field_id_from_name( $field );
  }

  if ( empty( $field_id ) ) {
    return false;
  }

  $field          = xprofile_get_field( $field_id );
  $field_type     = BP_XProfile_Field::get_type( $field_id );
  $field_type_obj = bp_xprofile_create_field_type( $field_type );

  
/**
 * Filter the raw submitted profile field value.
 *
 * Use this filter to modify the values submitted by users before
 * doing field-type-specific validation.
 *
 * @since 2.1.0
 *
 * @param mixed                  $value          Value passed to xprofile_set_field_data().
 * @param BP_XProfile_Field      $field          Field object.
 * @param BP_XProfile_Field_Type $field_type_obj Field type object.
 */
  $value = apply_filters( 'bp_xprofile_set_field_data_pre_validate', $value, $field, $field_type_obj );

  // Special-case support for integer 0 for the number field type.
  if ( $is_required && ! is_integer( $value ) && $value !== '0' && ( empty( $value ) || ! is_array( $value ) && ! strlen( trim( $value ) ) ) ) {
    return false;
  }

  
/**
 * Certain types of fields (checkboxes, multiselects) may come through empty.
 * Save as empty array so this isn't overwritten by the default on next edit.
 *
 * Special-case support for integer 0 for the number field type
 */
  if ( empty( $value ) && ! is_integer( $value ) && $value !== '0' && $field_type_obj->accepts_null_value ) {
    $value = array();
  }

  // If the value is empty, then delete any field data that exists, unless the field is of a type
  // where null values are semantically meaningful.
  if ( empty( $value ) && ! is_integer( $value ) && $value !== '0' && ! $field_type_obj->accepts_null_value ) {
    xprofile_delete_field_data( $field_id, $user_id );
    return true;
  }

  // For certain fields, only certain parameters are acceptable, so add them to the whitelist.
  if ( $field_type_obj->supports_options ) {
    $field_type_obj->set_whitelist_values( wp_list_pluck( $field->get_children(), 'name' ) );
  }

  // Check the value is in an accepted format for this form field.
  if ( ! $field_type_obj->is_valid( $value ) ) {
    return false;
  }

  $field           = new BP_XProfile_ProfileData();
  $field->field_id = $field_id;
  $field->user_id  = $user_id;
  $field->value    = maybe_serialize( $value );

  return $field->save();
}
 

other than admin user block wp-admin

add_action( 'admin_init', 'redirect_non_admin_users' ); /** * Redirect non-admin users to home page * * This function is attached to the 'admin_init' action hook. */ function redirect_non_admin_users() { if ( ! current_user_can( 'manage_options' ) && '/wp-admin/admin-ajax.php' != $_SERVER['PHP_SELF'] ) { wp_redirect( home_url() ); exit; } }

get user information in front end

https://codex.wordpress.org/Function_Reference/the_author_meta


<h2><?php the_author_meta( 'display_name' ); ?></h2>

<p><?php echo the_author_meta('description'); ?></p>

<a href="http://twitter.com/<?php echo the_author_meta('twitter'); ?>" target="_blank"><?php echo the_author_meta('twitter'); ?> sdcfsdf</a>

how to create custom user roles in wordpress

 http://stackoverflow.com/questions/18060156/wp-user-create-setting-a-role-wordpress


$user_id = wp_create_user( $user_name, $random_password, $user_email );
$user_id_role = new WP_User($user_id);
$user_id_role->set_role('contributor');

add custom fields user registration wordpress

http://blog.ashfame.com/2010/11/add-custom-field-registration-wordpress/



<?php
/*
Plugin Name: Custom Profile field as a Registration Field
Plugin URI: http://blog.ashfame.com/2010/11/add-custom-field-registration-wordpress/
Description: Sample plugin for adding a custom profile field to WordPress and on the registration page
Author: Ashfame
Version: 0.1
Author URI: http://blog.ashfame.com/
*/

/**
 * Add additional custom field
 */

add_action ( 'show_user_profile', 'my_show_extra_profile_fields' );
add_action ( 'edit_user_profile', 'my_show_extra_profile_fields' );

function my_show_extra_profile_fields ( $user )
{
?>
<h3>Store information</h3>
<table class="form-table">
<tr>
<th><label for="twitter">Twitter</label></th>
<td>
<input type="text" name="twitter" id="twitter" value="<?php echo esc_attr( get_the_author_meta( 'twitter', $user->ID ) ); ?>" class="regular-text" /><br />
<span class="description">Please enter your Twitter username.</span>
</td>
</tr>
<tr>
<th><label for="sname">Store Name</label></th>
<td>
<input type="text" name="sname" id="sname" value="<?php echo esc_attr( get_the_author_meta( 'sname', $user->ID ) ); ?>" class="regular-text" /><br />
<span class="description">Please enter your Store name.</span>
</td>
</tr>
</table>
<?php
}

add_action ( 'personal_options_update', 'my_save_extra_profile_fields' );
add_action ( 'edit_user_profile_update', 'my_save_extra_profile_fields' );

function my_save_extra_profile_fields( $user_id )
{
if ( !current_user_can( 'edit_user', $user_id ) )
return false;
/* Copy and paste this line for additional fields. Make sure to change 'twitter' to the field ID. */
update_usermeta( $user_id, 'twitter', $_POST['twitter'] );
update_usermeta( $user_id, 'sname', $_POST['sname'] );
}

/**
 * Add cutom field to registration form
 */

add_action('register_form','show_first_name_field');
add_action('register_post','check_fields',10,3);
add_action('user_register', 'register_extra_fields');

function show_first_name_field()
{
?>
<p>
<label>Twitter<br/>
<input id="twitter" type="text" tabindex="30" size="25" value="<?php echo $_POST['twitter']; ?>" name="twitter" />
</label>
</p>
<p>
<label>Store Name<br/>
<input id="sname" type="text" tabindex="30" size="25" value="<?php echo $_POST['sname']; ?>" name="sname" />
</label>
</p>
<?php
}

function check_fields ( $login, $email, $errors )
{
global $twitter;
if ( $_POST['twitter'] == '' )
{
$errors->add( 'empty_realname', "<strong>ERROR</strong>: Please Enter your twitter handle" );
}
else
{
$twitter = $_POST['twitter'];
}

global $sname;
if ( $_POST['sname'] == '' )
{
$errors->add( 'empty_realname', "<strong>ERROR</strong>: Please Enter your Store name" );
}
else
{
$sname = $_POST['sname'];
}
}

function register_extra_fields ( $user_id, $password = "", $meta = array() )
{
update_user_meta( $user_id, 'twitter', $_POST['twitter'] );
update_user_meta( $user_id, 'twitter', $_POST['sname'] );
}

?>

hide user profile fields wordpress

add_action('admin_init', 'user_profile_fields_disable');

function user_profile_fields_disable() {

    global $pagenow;

    // apply only to user profile or user edit pages
    if ($pagenow!=='profile.php' && $pagenow!=='user-edit.php') {
        return;
    }

    // do not change anything for the administrator
    if (current_user_can('administrator')) {
        return;
    }

    add_action( 'admin_footer', 'user_profile_fields_disable_js' );

}


/**
 * Disables selected fields in WP Admin user profile (profile.php, user-edit.php)
 */
function user_profile_fields_disable_js() {
?>
    <script>
        jQuery(document).ready( function($) {
            var fields_to_disable = ['email', 'role', 'submit'];
            for(i=0; i<fields_to_disable.length; i++) {
                if ( $('#'+ fields_to_disable[i]).length ) {
                    $('#'+ fields_to_disable[i]).css("display", "none");
                }
            }
        });
    </script>
<?php
}