26/11/2013, 09:51
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| | | Fecha de Ingreso: septiembre-2010
Mensajes: 409
Antigüedad: 13 años, 7 meses Puntos: 56 | |
Respuesta: Descargar archivos con PHP Para comprimirlo en archivo zip y por si acaso tu configuracion de php no tiene la opcion de usar archivos zip, vamos a usar una clase creada por Eric Mueller Código PHP: <?php /* Zip file creation class makes zip files on the fly... use the functions add_dir() and add_file() to build the zip file; see example code below by Eric Mueller http://www.themepark.com v1.1 9-20-01 - added comments to example v1.0 2-5-01 initial version with: - class appearance - add_file() and file() methods - gzcompress() output hacking by Denis O.Philippov, [email protected], http://www.atlant.ru */ // official ZIP file format: http://www.pkware.com/appnote.txt class zipfile { var $datasec = array(); // array to store compressed data var $ctrl_dir = array(); // central directory var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record var $old_offset = 0; function add_dir($name) // adds "directory" to archive - do this before putting any files in directory! // $name - name of directory... like this: "path/" // ...then you can add files using add_file with names like "path/file.txt" { $name = str_replace("\\", "/", $name); $fr = "\x50\x4b\x03\x04"; $fr .= "\x0a\x00"; // ver needed to extract $fr .= "\x00\x00"; // gen purpose bit flag $fr .= "\x00\x00"; // compression method $fr .= "\x00\x00\x00\x00"; // last mod time and date $fr .= pack("V",0); // crc32 $fr .= pack("V",0); //compressed filesize $fr .= pack("V",0); //uncompressed filesize $fr .= pack("v", strlen($name) ); //length of pathname $fr .= pack("v", 0 ); //extra field length $fr .= $name; // end of "local file header" segment // no "file data" segment for path // "data descriptor" segment (optional but necessary if archive is not served as file) $fr .= pack("V",$crc); //crc32 $fr .= pack("V",$c_len); //compressed filesize $fr .= pack("V",$unc_len); //uncompressed filesize // add this entry to array $this -> datasec[] = $fr; $new_offset = strlen(implode("", $this->datasec)); // ext. file attributes mirrors MS-DOS directory attr byte, detailed // at http://support.microsoft.com/support/kb/articles/Q125/0/19.asp // now add to central record $cdrec = "\x50\x4b\x01\x02"; $cdrec .="\x00\x00"; // version made by $cdrec .="\x0a\x00"; // version needed to extract $cdrec .="\x00\x00"; // gen purpose bit flag $cdrec .="\x00\x00"; // compression method $cdrec .="\x00\x00\x00\x00"; // last mod time & date $cdrec .= pack("V",0); // crc32 $cdrec .= pack("V",0); //compressed filesize $cdrec .= pack("V",0); //uncompressed filesize $cdrec .= pack("v", strlen($name) ); //length of filename $cdrec .= pack("v", 0 ); //extra field length $cdrec .= pack("v", 0 ); //file comment length $cdrec .= pack("v", 0 ); //disk number start $cdrec .= pack("v", 0 ); //internal file attributes $ext = "\x00\x00\x10\x00"; $ext = "\xff\xff\xff\xff"; $cdrec .= pack("V", 16 ); //external file attributes - 'directory' bit set $cdrec .= pack("V", $this -> old_offset ); //relative offset of local header $this -> old_offset = $new_offset; $cdrec .= $name; // optional extra field, file comment goes here // save to array $this -> ctrl_dir[] = $cdrec; } function add_file($data, $name) // adds "file" to archive // $data - file contents // $name - name of file in archive. Add path if your want { $name = str_replace("\\", "/", $name); //$name = str_replace("\\", "\\\\", $name); $fr = "\x50\x4b\x03\x04"; $fr .= "\x14\x00"; // ver needed to extract $fr .= "\x00\x00"; // gen purpose bit flag $fr .= "\x08\x00"; // compression method $fr .= "\x00\x00\x00\x00"; // last mod time and date $unc_len = strlen($data); $crc = crc32($data); $zdata = gzcompress($data); $zdata = substr( substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug $c_len = strlen($zdata); $fr .= pack("V",$crc); // crc32 $fr .= pack("V",$c_len); //compressed filesize $fr .= pack("V",$unc_len); //uncompressed filesize $fr .= pack("v", strlen($name) ); //length of filename $fr .= pack("v", 0 ); //extra field length $fr .= $name; // end of "local file header" segment // "file data" segment $fr .= $zdata; // "data descriptor" segment (optional but necessary if archive is not served as file) $fr .= pack("V",$crc); //crc32 $fr .= pack("V",$c_len); //compressed filesize $fr .= pack("V",$unc_len); //uncompressed filesize // add this entry to array $this -> datasec[] = $fr; $new_offset = strlen(implode("", $this->datasec)); // now add to central directory record $cdrec = "\x50\x4b\x01\x02"; $cdrec .="\x00\x00"; // version made by $cdrec .="\x14\x00"; // version needed to extract $cdrec .="\x00\x00"; // gen purpose bit flag $cdrec .="\x08\x00"; // compression method $cdrec .="\x00\x00\x00\x00"; // last mod time & date $cdrec .= pack("V",$crc); // crc32 $cdrec .= pack("V",$c_len); //compressed filesize $cdrec .= pack("V",$unc_len); //uncompressed filesize $cdrec .= pack("v", strlen($name) ); //length of filename $cdrec .= pack("v", 0 ); //extra field length $cdrec .= pack("v", 0 ); //file comment length $cdrec .= pack("v", 0 ); //disk number start $cdrec .= pack("v", 0 ); //internal file attributes $cdrec .= pack("V", 32 ); //external file attributes - 'archive' bit set $cdrec .= pack("V", $this -> old_offset ); //relative offset of local header // echo "old offset is ".$this->old_offset.", new offset is $new_offset<br>"; $this -> old_offset = $new_offset; $cdrec .= $name; // optional extra field, file comment goes here // save to central directory $this -> ctrl_dir[] = $cdrec; } function file() { // dump out file $data = implode("", $this -> datasec); $ctrldir = implode("", $this -> ctrl_dir); return $data. $ctrldir. $this -> eof_ctrl_dir. pack("v", sizeof($this -> ctrl_dir)). // total # of entries "on this disk" pack("v", sizeof($this -> ctrl_dir)). // total # of entries overall pack("V", strlen($ctrldir)). // size of central dir pack("V", strlen($data)). // offset to start of central dir "\x00\x00"; // .zip file comment length } } ?> Despues de crear el script de la clase, comenzamos a usar la clase para enviarle al usuario el archivo comprimido con todas las imagenes dentro
El script que usas, deberia quedar asi Código PHP: <?php require ("zipfile.php");// ruta a el archivo de la clase anteriormente mencionada $zipfile = new zipfile(); // creamos el objeto zip $codigo=$_GET['rubro']; $productos=mysql_query("SELECT * FROM productos WHERE empresa='$codigo' ORDER BY codigo",$link); //Creamos el objeto zipfile while($producto=mysql_fetch_array($productos)){ $archivo_remoto='fotos/'.$producto['codigo'].'.jpg'; if (file_exists($archivo_remoto)){ $zipfile->add_file(implode("",file($archivo_remoto)), $producto['codigo'].'.jpg'); } } // Una vez agregados todos los archivos , enviamos las cabeceras y el archivo header("Content-type: application/octet-stream"); header("Content-disposition: attachment; filename=zipfile.zip"); echo $zipfile->file(); ?> |