How to convert files to binary output in PHP

PHP method to convert files to binary: first set "header("Content-type: image/jpeg");"; then open and read the file through the fopen and fread functions; finally convert the image file to binary Just output the stream to the client.

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php converts files into binary output

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

With just a few words, the picture is output to the client in the form of a binary stream, which is no different from opening a picture. It should be noted that the header sent should be determined according to the specific situation. Not necessarily all image/jpeg. JPG is it, but PNG is image/png. Different pictures output different headers.

Purpose:

OSS supports uploading file streams by default, but the input form returns a file by default:

 /**
    * 支持文件类型上传到OSS
    */
    public static  function uploadFile($filename, $ext = 'jpg', $type = Enum_OSS_File_Type::IMG) {
        $content = static::file2content($filename);
        return static::upload($content, $ext, $type);
    }
    
    public static  function file2content($filename) {
        return fread(fopen($filename, 'r'), filesize($filename));
    }

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