How can I support gles1.1 extensions feature OES using gles 2.x?

Question

Is there anyway to support gles1.1 OES extensions using gles 2.x or 3.x? This is the snippet of my code

bool ColorBuffer::bind_fbo()
{
    if (m_fbo) {
        // fbo already exist - just bind
        s_gl.glBindFramebufferOES(GL_FRAMEBUFFER_OES, m_fbo);
        return true;
    }

    s_gl.glGenFramebuffersOES(1, &m_fbo);
    s_gl.glBindFramebufferOES(GL_FRAMEBUFFER_OES, m_fbo);
    s_gl.glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES,
                               GL_COLOR_ATTACHMENT0_OES,
                               GL_TEXTURE_2D, m_tex, 0);
    GLenum status = s_gl.glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES);
    if (status != GL_FRAMEBUFFER_COMPLETE_OES) {
        s_gl.glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0);
        s_gl.glDeleteFramebuffersOES(1, &m_fbo);
        m_fbo = 0;
        return false;
    }

    return true;
}

I need to re-implement this code using gles 2.x or higher since new platform doesn't support gles 1.1 anymore.

Anyone know how to do?

Thanks, Jiancong