PHP - Fread
Similar TutorialsHi! I run a site the requires users to access largeish files, for download as well for streaming to the browser. It's fairly active, so assuming the worst, how bad is getting php to read the files that would be stored outside of the webroot and then getting it to echo it to a page dynamically for the browser to then read? Currently, I just have the files stored accessible to the web, but a htaccess protects them via requiring a cookie but also requires the referrer to be my site. Now I'm not totally stupid and realise those are both easily spoofed, so I'm looking for a better solution. How do the file hosting sites do it? Using a token system has to involve PHP or some other server side scripting, but then getting the server to read the file with fread() or some similar equivalent would be resource heavy, no? Is that the best way to do it? Hello. I need help adding a text file content by one and then saving. My current code is $myFile = "serving"; $fh = fopen($myFile, 'w+') or die("can't open file"); $conv = fread($fh, 4); $stringData = $conv++; fwrite($fh, $stringData); fclose($fh); I was told this would work, but of course, it doesn't. It always returns 1. I also tried casting it as an int by using $stringData = (int) $conv++; I want to load and display the content of a text file (actually it is a cache file). I tested both method using a long for loop as Code: [Select] for ($i=0; $i < 10000; $i++) { $handle = fopen("test.txt", "r"); $text = fread($handle, filesize("test.txt")); fclose($handle); echo $text; }and Code: [Select] for ($i=0; $i < 10000; $i++) { $text = file_get_contents("test.txt"); echo $text; } but the results were similar, though with a large distribution of the comparative data. The speed of a method was 0.5 to 2.0 faster than the other one (in various runs). Which method do you recommend? Could you please quote the pros and cons of each method? Hi i am trying to read a page that i open but i keep getting errors and dont know why any ideas. The code im using is: foreach($url_extq_data as $a) { $var .=$a; } // now replace all the tags in the substring and out put the data $from = array("{our_track}", "{name}", "{surname}", "{email}", "{title}", "{gender}", "{dobday}", "{dobmonth}", "{dobyear}", "{address}", "{address2}", "{town}", "{county}", "{postcode}", "{tel}", "{mobile}", "{timestampu}", "{timestampr}", "{username}", "{password}", "{company}", "{siteurl}", "{fax}", "{tracking}"); $to = array("$our_id", "$name", "$surname", "$email", "$title", "$gender", "$dobday", "$dobmonth", "$dobyear", "$address", "$address2", "$town", "$county", "$postcode", "$tel", "$mobile", "$timestampu", "$timestampr", "$username", "$password", "$company", "$siteurl", "$fax", "$trackit"); $final_url = str_replace($from, $to, $var); // open url and wait for response $handle = fopen('$final_url', "r"); echo $final_url; ##$contents2 = stream_get_contents($handle); $contents2 = ''; $contents2 .= fread($handle, 100); $contents2 = trim($contents2); This is what i get back: <br /> <b>Warning</b>: fopen($final_url) [<a href='function.fopen'>function.fopen</a>]: failed to open stream: No such file or directory in <b>/home/s/e/searlco/web/public_html/ms_creg.php</b> on line <b>232</b><br /> http://www.cleanleads.co.uk/lead.aspx?campid=30&suppid=284&HSID=1121&HOID=52&FirstName=Dafydd&LastName=Thomas&AddressLine1=31 Cottage Street&Postcode=SS131HR&Gender=M&DateOfBirth=13/10/1980&emailaddress=dait@tedfsdfsdit.com&title=Mr&SupplierSourceCode=11866<br /> <b>Warning</b>: fread(): supplied argument is not a valid stream resource in <b>/home/s/e/searlco/web/public_html/ms_creg.php</b> on line <b>236</b><br /> ER Any help anyone???? im lost Hi all I am pulling my hair out trying to get the following script to work Code: [Select] <?php error_reporting(E_ALL); ini_set('display_errors', '1'); if (!function_exists("ssh2_connect")) die("function ssh2_connect doesn't exist"); // log in at server1.example.com on port 22 if(!($con = ssh2_connect("*.*.*.*", 22))){ echo "fail: unable to establish connection\n"; } else { // try to authenticate with username root, password secretpassword if(!ssh2_auth_password($con, "root", "********")) { echo "fail: unable to authenticate\n"; } else { // allright, we're in! echo "okay: logged in...\n"; // execute a command if (!($stream = ssh2_exec($con, "ls -al" ))) { echo "fail: unable to execute command\n"; } else { echo "should be ok"; // collect returning data from command stream_set_blocking($stream, true); $data = "path to file checked by logging into WINSCP and looking at properties. Is a .txt file"; echo $data; while ($buf = fread($stream,4096)) { $data .= $buf; } fclose($stream); } } } Basically shouldnt this display the contents of the file to me? On screen I just get Quote okay: logged in... should be ok What is my error? Thanks I found a script online that I am trying to get working. It was giving a 500 error from the get go and I've pinpointed it to the $data = fread() line. Does anyone know why? <?php $file = "../../media/v_360.m4v"; $filesize = filesize($file); $offset = 0; $length = $filesize; if (isset($_SERVER['HTTP_RANGE'])) { // if the HTTP_RANGE header is set we're dealing with partial content $partialContent = true; // find the requested range // this might be too simplistic, apparently the client can request // multiple ranges, which can become pretty complex, so ignore it for now preg_match('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches); $offset = intval($matches[1]); $length = intval($matches[2]) - $offset; } else { $partialContent = false; } $file = fopen($file, 'r'); // seek to the requested offset, this is 0 if it's not a partial content request fseek($file, $offset); $data = fread($file, $length); /* fclose($file); if ($partialContent) { // output the right headers for partial content header('HTTP/1.1 206 Partial Content'); header('Content-Range: bytes ' . $offset . '-' . ($offset + $length) . '/' . $filesize); } // output the regular HTTP headers header('Content-Type: ' . $ctype); header('Content-Length: ' . $filesize); header('Content-Disposition: attachment; filename="' . $fileName . '"'); header('Accept-Ranges: bytes'); // don't forget to send the data too print($data); */ ?> Its trying to read a 60mb file. Do you think it is timing out and that is causing the error? Dear friends, I wrote a code to extract a text from a pages of a site like this: ************ $handle = @fopen($url, 'r'); $contents = ''; if ($handle) { while (!feof($handle)) { $contents .= fread($handle, 8192); } ************ This code is working properly with many pages just pages those are began with the following tags: ************ ... <body> <form name="aspnetForm" method="post" action="ViewContents.aspx?Contract=cms_Contents_I_News&amp%3br=721192" id="aspnetForm"> <input type="hidden" name="__VIEWSTATE" id=" __VIEWSTATE" value="" /> <input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWAwL+raDpAgL3qPzdCwLyp86ZD5mqDm6ZnRL/pRerpqyobvzmy5LB" /> ************ The result of function read() in variable $content is not full. It's just theme of the page without main content. I mean there isn't the story related to id of page (e.g. 721192) in the $content. Why? Is the above <form> affected the result? What can i do? Please help me. |