Problem with the pdf being generated

 I use a php script to parse the text out of pdfs. All the pdfs that are created I get no text out of them. If I re-save one of the pdf's in adobe making no changes just hitting save then I can get text out. The file size also changes slightly when I do that. I have tried creating the pdf''s using the compatibility options to make them compatible with different versions all the same result. I can extract text from other pdfs just not the ones created with this. I don't know how the files are different or what I can do to make them the same as the ones being created in adobe. Any help would be much appreciated. 

 Figured it out Fast WebView needs to be enabled.