how to replace text in a binary file (FDF) using PHP

[ashishporwal]

Hi,

 

I need to edit an FDF (Forms Data Format) file. I suppose it is a binary file. The file contains some text and image data. I need to replace certain instances of a text with other. If i use the normal str_replace function, i lose the image data as soon as i assign the file content to a string. Please let me know how can i edit the FDF file contents. I am unable to use FDF functions available in PHP because GoDaddy (my webserver) is reluctant to install FDF toolkit.

 

Please let me know how can i use the normal PHP functions to edit a binary file (FDF).