BuddyPress - Force Users to add Strong Password

yzc_force_strong_password.php

<?php

add_filter( 'bp_members_validate_user_password', function ($errors, $pass ) {
    if ( $errors->has_errors() ) {
        return $errors;
    }
    $uppercase_exp    = '/[A-Z]/';
    $lowercase_exp    = '/[a-z]/';
    $special_char_exp = '/[!@#$%^&*()-_=+{};:,<.>]/';
    $numeric_exp      = '/[0-9]/';
    if ( preg_match_all( $uppercase_exp, $pass, $o ) < 1 ) {
        // Check if password has one upper case letter.
        $errors->add( 'missing_uppercase', __( 'Please make sure you enter a strong password. It should containing uppercase, lowercase, number, and special character', 'buddypress' ) );
    } elseif ( preg_match_all( $lowercase_exp, $pass, $o ) < 1 ) {
        // Check if password has one lower case letter.
        $errors->add( 'missing_lowercase', __( 'Please make sure you enter a strong password. It should containing uppercase, lowercase, number, and special character', 'buddypress' ) );
    } elseif ( preg_match_all( $special_char_exp, $pass, $o ) < 1 ) {
        // Check if password has one special letter.
        $errors->add( 'missing_special_char', __( 'Please make sure you enter a strong password. It should containing uppercase, lowercase, number, and special character', 'buddypress' ) );
    } elseif ( preg_match_all( $numeric_exp, $pass, $o ) < 1 ) {
        // Check if password has one numeric letter.
        $errors->add( 'missing_numeric_char', __( 'Please make sure you enter a strong password. It should containing uppercase, lowercase, number, and special character', 'buddypress' ) );
    } elseif ( strlen( $pass ) < 8 ) {
        // Check if password has certain limit.
        $errors->add( 'missing_char_limit', __( 'Please make sure you enter a strong password. It should containing uppercase, lowercase, number, and special character', 'buddypress' ) );
    }
    return $errors;
}, 10, 2 );