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:

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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

fread() function reads the open file.

The function will stop running when it reaches the specified length or reaches the end of file (EOF) (whichever comes first). This function returns the string read, or FALSE on failure.

Syntax

string fread ( resource $handle , int $length )

Parameters

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

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

Code implementation:

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

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