usando php para baixar arquivos, não funcionando em arquivos grandes?

Estou usando o php para baixar arquivos, em vez do próprio arquivo em uma nova janela. Parece funcionar bem para arquivos menores, mas não funciona para arquivos grandes (eu preciso que isso funcione em arquivos muito grandes). Aqui está o código que eu tenho para baixar o arquivo:

function downloadFile($file) { if (file_exists($file)) { //download file header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename='.basename($file)); header('Content-Transfer-Encoding: binary'); header('Expires: 0'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); header('Content-Length: '.filesize($file)); ob_clean(); flush(); readfile($file); exit; }; }; 

Mas quando eu tento baixar um arquivo grande (exemplo 265mb), o navegador me diz que não pode encontrar o arquivo? Os arquivos são definately no servidor, e o script funciona bem para os arquivos menores. Existe alguma maneira de baixar arquivos grandes semelhantes ao que eu já tenho?

O PHP tem limites sobre quanto tempo um script pode ser executado e quanto memory ele pode usar. É possível que o script seja expirado antes que ele seja concluído, ou esteja usando muita memory lendo no arquivo grande.

Tente ajustar as variables max_execution_time e memory_limit no php.ini . Se você não tiver access ao php.ini , experimente as funções set_time_limit e / ou ini_set .

Vejo que você está usando o ob_clean . Se você tiver o buffer de saída ativado, tente desativá-lo (por exemplo, substituindo a chamada ob_end_clean por ob_end_clean ).

Este script de download é capaz de baixar arquivos muito grandes (MBs ou GBs). Certifique-se também de configurar as configurações ini como disse Tom . Para arquivos massivamente grandes, geralmente é melhor usar o método X-Sendfile em PHP. Saiba mais aqui . Enfim, eu postei o código de trabalho. Talvez seja útil para pessoas que procuram scripts de trabalho sem erros. Script é tirado do PHPsnips , espero que o ache útil.

 /** * @author Jack Mason * @website volunteer @ http://www.osipage.com, web access application and bookmarking tool. * @copyright Free script, use anywhere as you like, no attribution required */ /* You may need these ini settings too */ set_time_limit(0); ini_set('memory_limit', '512M'); //THE DOWNLOAD SCRIPT $filePath = "D:/Software/versions/windows/windows_7.rar"; // set your download file path here. download($filePath); // calls download function function download($filePath) { if(!empty($filePath)) { $fileInfo = pathinfo($filePath); $fileName = $fileInfo['basename']; $fileExtnesion = $fileInfo['extension']; $default_contentType = "application/octet-stream"; $content_types_list = mimeTypes(); // to find and use specific content type, check out this IANA page : http://www.iana.org/assignments/media-types/media-types.xhtml if (array_key_exists($fileExtnesion, $content_types_list)) { $contentType = $content_types_list[$fileExtnesion]; } else { $contentType = $default_contentType; } if(file_exists($filePath)) { $size = filesize($filePath); $offset = 0; $length = $size; //HEADERS FOR PARTIAL DOWNLOAD FACILITY BEGINS if(isset($_SERVER['HTTP_RANGE'])) { preg_match('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches); $offset = intval($matches[1]); $length = intval($matches[2]) - $offset; $fhandle = fopen($filePath, 'r'); fseek($fhandle, $offset); // seek to the requested offset, this is 0 if it's not a partial content request $data = fread($fhandle, $length); fclose($fhandle); header('HTTP/1.1 206 Partial Content'); header('Content-Range: bytes ' . $offset . '-' . ($offset + $length) . '/' . $size); }//HEADERS FOR PARTIAL DOWNLOAD FACILITY BEGINS //USUAL HEADERS FOR DOWNLOAD header("Content-Disposition: attachment;filename=".$fileName); header('Content-Type: '.$contentType); header("Accept-Ranges: bytes"); header("Pragma: public"); header("Expires: -1"); header("Cache-Control: no-cache"); header("Cache-Control: public, must-revalidate, post-check=0, pre-check=0"); header("Content-Length: ".filesize($filePath)); $chunksize = 8 * (1024 * 1024); //8MB (highest possible fread length) if ($size > $chunksize) { $handle = fopen($_FILES["file"]["tmp_name"], 'rb'); $buffer = ''; while (!feof($handle) && (connection_status() === CONNECTION_NORMAL)) { $buffer = fread($handle, $chunksize); print $buffer; ob_flush(); flush(); } if(connection_status() !== CONNECTION_NORMAL) { echo "Connection aborted"; } fclose($handle); } else { ob_clean(); flush(); readfile($filePath); } } else { echo 'File does not exist!'; } } else { echo 'There is no file to download!'; } } /* Function to get correct MIME type for download */ function mimeTypes() { /* Just add any required MIME type if you are going to download something not listed here.*/ $mime_types = array("323" => "text/h323", "acx" => "application/internet-property-stream", "ai" => "application/postscript", "aif" => "audio/x-aiff", "aifc" => "audio/x-aiff", "aiff" => "audio/x-aiff", "asf" => "video/x-ms-asf", "asr" => "video/x-ms-asf", "asx" => "video/x-ms-asf", "au" => "audio/basic", "avi" => "video/x-msvideo", "axs" => "application/olescript", "bas" => "text/plain", "bcpio" => "application/x-bcpio", "bin" => "application/octet-stream", "bmp" => "image/bmp", "c" => "text/plain", "cat" => "application/vnd.ms-pkiseccat", "cdf" => "application/x-cdf", "cer" => "application/x-x509-ca-cert", "class" => "application/octet-stream", "clp" => "application/x-msclip", "cmx" => "image/x-cmx", "cod" => "image/cis-cod", "cpio" => "application/x-cpio", "crd" => "application/x-mscardfile", "crl" => "application/pkix-crl", "crt" => "application/x-x509-ca-cert", "csh" => "application/x-csh", "css" => "text/css", "dcr" => "application/x-director", "der" => "application/x-x509-ca-cert", "dir" => "application/x-director", "dll" => "application/x-msdownload", "dms" => "application/octet-stream", "doc" => "application/msword", "dot" => "application/msword", "dvi" => "application/x-dvi", "dxr" => "application/x-director", "eps" => "application/postscript", "etx" => "text/x-setext", "evy" => "application/envoy", "exe" => "application/octet-stream", "fif" => "application/fractals", "flr" => "x-world/x-vrml", "gif" => "image/gif", "gtar" => "application/x-gtar", "gz" => "application/x-gzip", "h" => "text/plain", "hdf" => "application/x-hdf", "hlp" => "application/winhlp", "hqx" => "application/mac-binhex40", "hta" => "application/hta", "htc" => "text/x-component", "htm" => "text/html", "html" => "text/html", "htt" => "text/webviewhtml", "ico" => "image/x-icon", "ief" => "image/ief", "iii" => "application/x-iphone", "ins" => "application/x-internet-signup", "isp" => "application/x-internet-signup", "jfif" => "image/pipeg", "jpe" => "image/jpeg", "jpeg" => "image/jpeg", "jpg" => "image/jpeg", "js" => "application/x-javascript", "latex" => "application/x-latex", "lha" => "application/octet-stream", "lsf" => "video/x-la-asf", "lsx" => "video/x-la-asf", "lzh" => "application/octet-stream", "m13" => "application/x-msmediaview", "m14" => "application/x-msmediaview", "m3u" => "audio/x-mpegurl", "man" => "application/x-troff-man", "mdb" => "application/x-msaccess", "me" => "application/x-troff-me", "mht" => "message/rfc822", "mhtml" => "message/rfc822", "mid" => "audio/mid", "mny" => "application/x-msmoney", "mov" => "video/quicktime", "movie" => "video/x-sgi-movie", "mp2" => "video/mpeg", "mp3" => "audio/mpeg", "mpa" => "video/mpeg", "mpe" => "video/mpeg", "mpeg" => "video/mpeg", "mpg" => "video/mpeg", "mpp" => "application/vnd.ms-project", "mpv2" => "video/mpeg", "ms" => "application/x-troff-ms", "mvb" => "application/x-msmediaview", "nws" => "message/rfc822", "oda" => "application/oda", "p10" => "application/pkcs10", "p12" => "application/x-pkcs12", "p7b" => "application/x-pkcs7-certificates", "p7c" => "application/x-pkcs7-mime", "p7m" => "application/x-pkcs7-mime", "p7r" => "application/x-pkcs7-certreqresp", "p7s" => "application/x-pkcs7-signature", "pbm" => "image/x-portable-bitmap", "pdf" => "application/pdf", "pfx" => "application/x-pkcs12", "pgm" => "image/x-portable-graymap", "pko" => "application/ynd.ms-pkipko", "pma" => "application/x-perfmon", "pmc" => "application/x-perfmon", "pml" => "application/x-perfmon", "pmr" => "application/x-perfmon", "pmw" => "application/x-perfmon", "pnm" => "image/x-portable-anymap", "pot" => "application/vnd.ms-powerpoint", "ppm" => "image/x-portable-pixmap", "pps" => "application/vnd.ms-powerpoint", "ppt" => "application/vnd.ms-powerpoint", "prf" => "application/pics-rules", "ps" => "application/postscript", "pub" => "application/x-mspublisher", "qt" => "video/quicktime", "ra" => "audio/x-pn-realaudio", "ram" => "audio/x-pn-realaudio", "ras" => "image/x-cmu-raster", "rgb" => "image/x-rgb", "rmi" => "audio/mid", "roff" => "application/x-troff", "rtf" => "application/rtf", "rtx" => "text/richtext", "scd" => "application/x-msschedule", "sct" => "text/scriptlet", "setpay" => "application/set-payment-initiation", "setreg" => "application/set-registration-initiation", "sh" => "application/x-sh", "shar" => "application/x-shar", "sit" => "application/x-stuffit", "snd" => "audio/basic", "spc" => "application/x-pkcs7-certificates", "spl" => "application/futuresplash", "src" => "application/x-wais-source", "sst" => "application/vnd.ms-pkicertstore", "stl" => "application/vnd.ms-pkistl", "stm" => "text/html", "svg" => "image/svg+xml", "sv4cpio" => "application/x-sv4cpio", "sv4crc" => "application/x-sv4crc", "t" => "application/x-troff", "tar" => "application/x-tar", "tcl" => "application/x-tcl", "tex" => "application/x-tex", "texi" => "application/x-texinfo", "texinfo" => "application/x-texinfo", "tgz" => "application/x-compressed", "tif" => "image/tiff", "tiff" => "image/tiff", "tr" => "application/x-troff", "trm" => "application/x-msterminal", "tsv" => "text/tab-separated-values", "txt" => "text/plain", "uls" => "text/iuls", "ustar" => "application/x-ustar", "vcf" => "text/x-vcard", "vrml" => "x-world/x-vrml", "wav" => "audio/x-wav", "wcm" => "application/vnd.ms-works", "wdb" => "application/vnd.ms-works", "wks" => "application/vnd.ms-works", "wmf" => "application/x-msmetafile", "wps" => "application/vnd.ms-works", "wri" => "application/x-mswrite", "wrl" => "x-world/x-vrml", "wrz" => "x-world/x-vrml", "xaf" => "x-world/x-vrml", "xbm" => "image/x-xbitmap", "xla" => "application/vnd.ms-excel", "xlc" => "application/vnd.ms-excel", "xlm" => "application/vnd.ms-excel", "xls" => "application/vnd.ms-excel", "xlt" => "application/vnd.ms-excel", "xlw" => "application/vnd.ms-excel", "xof" => "x-world/x-vrml", "xpm" => "image/x-xpixmap", "xwd" => "image/x-xwindowdump", "z" => "application/x-compress", "rar" => "application/x-rar-compressed", "zip" => "application/zip"); return $mime_types; } ?> 
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