Dynamic Image Generating in PHP from content

i want to know how can i generate image dynamically from content and also 开发者_C百科from existing image

as i know we can add sting to dynamically generated image in php

so actually i want to make image that contains existing image as well as content.

Read through the manual pages about the GD extension to learn how to use it to create and manipulate images.

But basically, to copy an image onto another, load it using one of the imagecreatefrom*() functions, such as imagecreatefromjpeg() or imagecreatefromgif(), and use the imagecopy() function.