Implementation code for PHP (HTTP protocol) file download

A PHP code to implement file download using the HTTP protocol, for in-depth understanding of the principle of PHP file download, is a good example of the need for friends, really should refer to the study. 1. File download code 0) {$file _data=fread ($fp, $buffer); Count the number of bytes read $file _count+= $buffer; Return part of the data to the browser echo $file _data; }//Close file fclose ($fp);? > 2. Encapsulation function: {echo "file is too large to download"; return; }*///http Download the desired response header header ("Content-type:application/octet-stream"); Returns the header of the file ("Accept-ranges:bytes"); Returns the header by byte size ("Accept-length: $file _size"); Returns the file size header ("content-disposition:attachment; Filename= ". $file _name);//The Client's popup dialog box, corresponding filename//return data to the client//set size output $buffer = 1024; In order to download security, we'd better make a file byte read counter $file _count=0; Determines whether the file pointer is to the end of the file (read whether the file ends) while (!feof ($fp) && ($file _size-$file _count) >0) {$file _data=fread ($fp, $ Buffer); Count the number of bytes read $file _count+= $buffer; Return part of the data to the browser echo $file _data; }//Close file fclose ($FP); } file_dowm ("Bjnihao.jpg", "/http/dowm/");? >

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