childs function.php file

@Abe Question, where would I find “childs function.php file” so I can input the following code from @sharmstr

function kleo_ajax_login()
{
// Check the nonce, if it fails the function will break
check_ajax_referer( ‘kleo-ajax-login-nonce’, ‘security’ );

// Nonce is checked, get the POST data and sign in user
$info = array();
$info[‘user_login’] = $_POST[‘log’];
$info[‘user_password’] = $_POST[‘pwd’];
$info[‘remember’] = (isset( $_POST[‘remember’] ) && $_POST[‘remember’] === true) ? true : false ;

$info = apply_filters(‘kleo_ajaxlogin_atts’, $info);

$user_signon = wp_signon( $info, false );
if ( is_wp_error($user_signon) ){
echo json_encode(array( ‘loggedin’ => false, ‘message’ => ‘<span class=”wrong-response”><i class=”icon icon-attention”></i> ‘ . __( ‘Wrong username or password. Please try again.’, ‘kleo_framework’ ) . ‘</span>’ ));
} else {
if ( sq_option( ‘login_redirect’ , ‘default’ ) == ‘reload’ ) {
$redirecturl = apply_filters( ‘login_redirect’, ‘/activity’, ”, $user_signon );;
}
else {
$redirecturl = apply_filters( ‘login_redirect’, ”, ”, $user_signon );
}

echo json_encode(array(‘loggedin’=>true, ‘redirecturl’ => $redirecturl, ‘message’=> ‘<span class=”good-response”><i class=”icon icon-ok-circled”></i> ‘ . __( ‘Login successful, redirecting…’,’kleo_framework’ ) . ‘</span>’ ));
}

die();
}