How PHP converts a picture file into a binary output

Source: Internet
Author: User

This article illustrates how PHP converts a picture file into binary output. Share to everyone for your reference. The implementation methods are as follows:

1 2 3 4 Header ("Content-type:image/jpeg"); $PSize = filesize (' 1.jpg '); $picturedata = Fread (fopen (' 1.jpg ', "R"), $PSize); Echo $picturedata;

As simple as 4 lines of code, the picture is exported as a binary stream to the client, and there is no difference between opening a picture.

It should be noted here that the headers are sent according to the specific circumstances, not necessarily all image/jpeg. JPG is image/jpeg, but PNG is image/png. Different types of pictures output different heads.

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