php - Wordpress display name string manipulation -

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i have set display name show both first name , last name using function below. how manipulate last name pull first letter of string? example, if sign john doe (first name= john, last name= doe), want display name john d.

thanks

function force_pretty_displaynames($user_login, $user) {  $outcome = trim(get_user_meta($user->id, 'first_name', true) . " " . get_user_meta($user->id, 'last_name', true)); if (!empty($outcome) && ($user->data->display_name!=$outcome)) {     wp_update_user( array ('id' => $user->id, 'display_name' => $outcome));     } } add_action('wp_login','force_pretty_displaynames',10,2);

this how solved using php's substr() function:

  $outcome = trim( get_user_meta( $user->id, 'first_name', true )  . ' '  . substr( get_user_meta( $user->id, 'last_name', true ), 0, 1 ) . '.' );

above code pat j

full code display first name , initial of last name in wordpress below. if else wants use it, remember paste in theme's function.php file

function force_pretty_displaynames($user_login, $user) {  $outcome = trim( get_user_meta( $user->id, 'first_name', true )  . ' '  . substr( get_user_meta( $user->id, 'last_name', true ), 0, 1 ) . '.' ); if (!empty($outcome) && ($user->data->display_name!=$outcome)) {     wp_update_user( array ('id' => $user->id, 'display_name' => $outcome));     } } add_action('wp_login','force_pretty_displaynames',10,2);

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