How to convert images into binary output in php

How PHP converts images into binary output: This can be achieved through the fopen() function in combination with the fread() function. The fopen() function can open a file or URL. The fread() function is used to read an open file and returns the read string.

Related function introduction:

(Recommended tutorial: php tutorial)

1. fopen function

fopen() function opens a file or URL.

If fopen() fails, it will return FALSE with an error message. You can hide error output by adding an '@' in front of the function name.

Syntax

fopen(filename,mode,include_path,context)

Parameter introduction:

• ##filename Required. Specifies the file or URL to open.​

• #mode Required. Specifies the type of access you are requesting to this file/stream.

2. fread function

string fread ( resource $handle , int $length )

• handle The file system pointer is a resource typically created by fopen().​

• #length Required. Specifies the maximum number of bytes to read.

header( "Content-type: image/jpeg");
$PSize = filesize('1.jpg');
$picturedata = fread(fopen('1.jpg', "r"), $PSize);
echo $picturedata;

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