PHP - Ob_start Buffering Is Dumping Output Prematurely
I am trying to use output buffering in the following manner:
Code: [Select] ob_start("OB_BUFFER"); echo 'Start'; do_stuff_function(); ob_end_clean(); echo 'End'; The problem is that when the output of "do_stuff_function" exceeds 4k the output is automatically flushed and I don't know why (exceeding some limit I suppose). So when the output of "do_stuff_function" is less than 4k, I get this: Code: [Select] Start My <4k output here... End When "do_stuff_function" exceeds 4k, I end up with this: Code: [Select] My > 4k output here... Start End I don't understand why this is. The docs seem to indicate that the way I am starting the ob_start() function there should be no buffer limit. Is that not true? Similar TutorialsHi. I have a problem with output buffering. I'm using wamp. I've tried setting the php.ini file to output_buffering = 0 and off I've tried using flush() and ob_flush(), separetly and together. I've tried turning on implicit_flush. Nothing works. Any ideas? I'm using the flowing code to test right now: Code: [Select] echo 'starting...<br/>'; for($i = 0; $i < 5; $i++) { print "$i<br/>"; flush(); sleep(2); } print 'DONE!<br/>'; Please excuse me if I don't use appropriate formatting, I'm new here, however, this seems like a good place to come for help. What I am trying to do: I am trying to make a class that will handle my layouts. What problem I am encountering: When I run my script, I am getting this message. "Fatal error: ob_start() [<a href='ref.outcontrol'>ref.outcontrol</a>]: Cannot use output buffering in output buffering display handlers in C:\xampp\htdocs\core\main.php on line 17" Here is the code I am using. Code: [Select] <?php class HTML{ private $header; private $footer; function __construct(){ ob_start(array($this,'callback')); } function callback($buffer){ $this->header(); $this->footer(); return $this->header.$buffer.$this->footer; } function header(){ ob_start(); // This is line 17 echo "header<hr />"; $this->header = ob_end_flush(); } function footer(){ ob_start(); echo "<hr />footer"; $this->footer = ob_end_flush(); } } $HTML = new HTML; ?> If anyone can help me, that will be great. Thanks, Alan Dears, I want to output an image by imagepng function in between some texts. For that I used the below codes Code: [Select] // Above this i set image properties by GD functions in $img variable ob_start(); echo "Text 1"; header("Content-type:image/png"); imagepng($img); imagedestroy($img); header("Content-type:text/html"); echo "Text 2"; ob_end_flush(); But unfortunately the image is not visible, rather it turns into some abnormal characters. But if I get rid of the texts (like below), image is printed perfectly. Code: [Select] // Above this i set image properties by GD functions in $img variable ob_start(); header("Content-type:image/png"); imagepng($img); imagedestroy($img); ob_end_flush(); Anybody please help. Hello, I am an absolute PHP newbie, and I have something which is probably a very stupid question. Nevertheless, I am stuck, despite Google and reading the docs. Here a very cut down example code: Code: [Select] <?php ob_start(); echo "123\n"; $body = ob_get_flush(); echo "body = ".$body; ?> I would have expected the output to be body = 123 It actually is 123 body=123 ie ob_start does indeed buffer the output, but it does not prevent if from getting through. This happens both on my Mac with 5.3.10, and on my server where I dont know the PHP version (...newbie...) Any help would be appreciated! I need to email the form http://keegenk.com/providenceltddesign/ to myself. Right now, the email is sending and the confirmation page comes up, but the email does not have any of the data that should be collected by the form. I'll attach the php file that I'm using to capture the variable and send it to the email address. Any and all help is appreciated. Thanks a bunch Evening folks, I'm interested in dumping the Request Cookies from this url: https://plus.espn.com/en/sdk-data/#id=btm_activity_jwpcbyve but i have been reading, and the only approach i found didn't work correctly. Was hoping some of you could share a few of your approaches to getting the cookies to the URL. again specifically from the request headers because they contain the value I'm looking for. Hey guys, what's the purpose of using ob_start() in the begining of the script? I even saw alot of people turning output buffering by default in their php.ini file ! What's the benefit of this action ? Thanks in advance Which of these is the "best coding practice" for the proper order of "ob_start," "sessions," and "require?" (my "require" files are usually just mySQL login stuff):
a.)
b.) And also, instead of just plain "session_start()" isn't it more proper to ALWAYS use if(!isset($_SESSION)) { session_start(); } Thank you in advance.
Hello, I am trying to change the string 'IRM Reporting Portal' to 'BIS Reporting Portal' as illustrated in the attachment 'Requirements.jpg'. On inspecting 'IRM Reporting Portal', I noticed the function DoResizeMS (). I found this function call in only one file across the entire code. That file is 'header.dsp' (attached) This leads me to believe that the string 'IRM Reporting Portal' is being dynamically generated in 'header.dsp' (Between ob_get_contents() and ob_start()) How do I change that string to 'BIS Reporting Portal'? Please help. I am a PHP newbie. Thanks, Trinanjan. i enabled my output_buffering i used ob_start() and ob_end_flush functions i did'nt put any html tag before my php i used rapid php 2010 so dont know it making utf8 or not and i dont know how to check it i read many forums threads but cant find answer please answer but still i'm not redirecting to index.php from login.php here is my login.php <?php require_once("../../includes/database.php"); require_once("../../includes/functions.php"); require_once("../../includes/user.php"); require_once("../../includes/session.php"); if($session->is_logged_in()) { redirect_to(index.php); } //redirect_to("index.php"); if(isset($_POST['submit'])) //... if submit button is clicked { $username = trim($_POST['username']); $password = trim($_POST['password']); // check in database to see if username/password exist $found_user = User::authenticate($username,$password); // if we get some record in var $found_user if($found_user) { $session->login($found_user); // echo $found_user->username; // here is problem not redirecting redirect_to("index.php"); // this method is user define in function.php } else { //where i put header() $message = "Password/Username combination is not correct."; } } else { $username =""; $password =""; } ?> <html> <head>....... here is my function.php <?php function redirect_to( $location = NULL ) { if ($location != NULL) { header("Location: {$location}"); exit; } } function output_message($message="") { if (!empty($message)) { return "<p class=\"message\">{$message}</p>"; } else { return ""; } } ?> i'm attaching files too I have just uploaded my 1st website project in my online server and the 1st error that I got is something like "Header ouput buffer" error. I have research on how to solve it and and I read that ob_start() will solve it. I have use it on the file that I'm having problem with and it instantly solve the problem. My question is... Is it always always ok to use it? I mean will it cause a slow page load or any conflicting errors that I might encounter in the future? another thing is... do I always need to end it? like put this end code "ob_end_flush(); " at the end of the line or it isn't necessary anymore? Hi, this, i think, is a 'php in firefox' issue despite me mentioning css in the title so please read on!.. please have a look, using firefox, at http://www.laureleroch.com/gallery.php... As you can see, when choosing different images via clicking on the thumbnails the page reloads and there's an amount of time where we see the page loaded without css applied..., however doesn't seem to be happening in IE9, opera, chrome, or safari. It IS happening in firefox on W7 and OSX. the file gallery.php has... <?php session_start(); ob_start(); include("scripts/php/gallery_display.php"); include("scripts/php/file_reader.php"); ...as its start...and... </body> </html> <?php ob_flush() ?> ..at its end. I can post all the code from the includes if required. I'd say there's a fair bit of processing done by these includes but really, not THAT much, plus other browsers seem to be doing ok with it. Also, the background images are big. That's a fact. The site will be in this way and I plan to use a preloader once I get the main build sorted...nearly there. One other thing...I really am a coding newbie. I've been toying with it for years, first with actionscript in flash, then html/css and now I'm getting really into php, however I'm sure my coding is pretty inefficient here and there thru nothing other than pure, undiluted ignorance...good, eh?! so, if anyone got some pointers that would be really brilliant... any other info required - please shout. cheers, Scott This topic has been moved to PHP Applications. http://www.phpfreaks.com/forums/index.php?topic=355260.0 Hi there, I am trying to create a file using fwrite function, but for something reason all I get is a blank file with no content inside. Here is the code, go to the bottom where the fwrite function is called: <?php //Get Nohay Albums function function GetAlbums($cattype){ if ((isset($_GET['year']))||(isset($_GET['reciter']))){ //nothing displayed } else{ $query = "SELECT COUNT(Topic), SUM(Hits) AS totalhits, FileFormat, Speaker, Language, Year, FileType, Cat FROM nauhey WHERE Cat='".addslashes($cattype)."' AND Year='".date('Y')."' GROUP By Speaker, Year"; $result = mysql_query($query) or die (mysql_error()); //<!------------ Create Cache -------------!> //folder where cache is saved $path = "cache/"; //Page name format: FunctionName_Category_Year.html $pagename = $path."getalbums_".$cattype.".html"; $cacheFile = fopen($pagename, "w"); if ($cacheFile == FALSE){ die ("Unable to create cache file"); } //Get HTML in a variable $obstart = ob_start(); if ($obstart == FALSE){ die ("Unable to buffer cache content!"); } //<!------------ Cache closed -------------!> if ($cattype = strtolower('nauhey')){ while ($row = mysql_fetch_array($result)){ echo ("<div class='container'>"); echo ("<img src=\"http://localhost/HAQMOLAAALI/backed up/haqmolaali/images/".$row['FileFormat'].".gif\">"); echo ("<b style=\"font-size:10px; color:#000066; position:absolute; margin-left: 500px;\">DOWNLOADS: ".$row['totalhits']."</b>"); echo (" <a href=\"nohay.php?reciter=".urlencode($row['Speaker'])."&year=".urlencode($row['Year'])."\">".$row['Speaker']." Vol ".$row['Year']."</a> <b style=\"font-size:10px; color:#000000;\">(".strtoupper($row['Language']).")</b>"."\n"); echo ("<div class='small'><b>Year: ".$row['Year']." | Language: ".ucfirst($row['Language'])." | Tracks: ".$row['COUNT(Topic)']."</b></div>"); echo ("</div>"); }//while loop closed } else { while ($row = mysql_fetch_array($result)){ echo ("<div class='container'>"); echo ("<img src=\"http://localhost/HAQMOLAAALI/backed up/haqmolaali/images/".$row['FileFormat'].".gif\">"); echo ("<b style=\"font-size:10px; color:#000066; position:absolute; margin-left: 500px;\">DOWNLOADS: ".$row['totalhits']."</b>"); echo (" <a href=\"majlis.php?reciter=".urlencode($row['Speaker'])."&year=".urlencode($row['Year'])."\">".$row['Speaker']." Vol ".$row['Year']."</a> <b style=\"font-size:10px; color:#000000;\">(".strtoupper($row['Language']).")</b>"); echo ("<div class='small'><b>Year: ".$row['Year']." | Language: ".ucfirst($row['Language'])." | Lectures in series: ".$row['COUNT(Topic)']."</b></div>"); echo ("</div>"); } } //<!------------ Cache Code -------------!> $cacheContent = ob_get_contents(); //Write to cache file fwrite ($cacheFile, $cacheContent) or die ("Cannot write cache content to file!"); fclose ($cacheFile); ob_flush(); ob_end_clean(); //<!------------ Cache Closed-------------!> } } GetAlbums("nauhey"); ?> When I execute the function, I get my self-made error "Cannot write cache content to file!". Help would be much appreciated. Thank you. Well I have a script that executes a scan on a system set to run infinitely, and I need it to echo out a message each time it loops through, but I don't want it to echo out the message with the next loop message below it, and the next one below that etc... I've tried using the flush(); function and been messing around with that with no luck. For security reasons I don't want to release any of the processing code, but here is the basic construction of the script: <?PHP ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** $RepeatIt = -1; for($g=1; $g!=$RepeatIt+1; $g++) { ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** $ScanMessage = ":.:.: SCANNING THE HITLIST FOR MOBSTER: ".$MobName." (SCAN #$g) :.:.:"."<br/><br/>"; echo $ScanMessage; ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** ***PROCESSING AND SCAN CODE*** } ?> At the moment it's returning: :.:.: SCANNING THE HITLIST FOR MOBSTER: DEUS EX DESTROYER (SCAN #1) :.:.: :.:.: SCANNING THE HITLIST FOR MOBSTER: DEUS EX DESTROYER (SCAN #2) :.:.: :.:.: SCANNING THE HITLIST FOR MOBSTER: DEUS EX DESTROYER (SCAN #3) :.:.: :.:.: SCANNING THE HITLIST FOR MOBSTER: DEUS EX DESTROYER (SCAN #4) :.:.: So what I want it to do is just delete the scanning message and replace it with the next scan message so while running this script you would see just the number increment on the same line. Any suggestions? Thanks. hello guys..!!! am new to this phpfreak community...i hav faced some problem while getting on floating point nos addition..if i use echo (int)((0.1+0.7))*10; i am getting output as 7. If i remove (int), i would get output as 8..which is correct... for any other possibilities like ((0.1+0.2))*10 am getting correct output as 3..pls guys help me on this wid proper reason....waiting for solution.... Hello. I'm looking for some help to make a script. The script should run a .bat file, and get the output from it. (The text from the console). Regards Worqy help me. i have an index.php file in admin folder. this is the code inside the file: Code: [Select] <?php ?> Or any other code and i get output 0 , but if i echo something else then i get the string has output, help find out what is the problam please!!! Hi. I found a code online but unfortunately, the data is retrieved via variables. How can i convert this code to retrieve the data from database instead. Thank you in ADVANCE! Code: [Select] var members = [ ['Steven B. Ayres', '1911-1913', 'New York', 'Independent Democrat', '1861-1929'], ['William Augustus Ayres', '1915-1921 1923-1934', 'Kansas', 'Democratic', '1867-1952'], ['William Hanes Ayres', '1951-1971', 'Ohio', 'Republican', '1916-2000'] ]; I don't have any output after I push the button :s I dont know how http://fhcs.be/index3.php Code: [Select] <?php // Include MySQL class require_once('inc/mysql.class.php'); // Include database connection require_once('inc/global.inc.php'); // Include functions session_start(); ?> <?php if (!isset($_POST['submit'])) { ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <form method="post" action="<?php echo $PHP_SELF; ?>"> <input type="submit" value="Toon Output" name="submit"/> <?php $dranken=array() ; $DrinkResult=mysql_query("SELECT name,price FROM products")or die(mysql_error()); while($DrinkRow=mysql_fetch_assoc($DrinkResult)){ $dranken[] = $DrinkRow; } echo "<table>"; foreach ($dranken as $DrinkRow) { $optionlist = "<select name='{$DrinkRow['name']}_aantal'>"; for ($i=0;$i<10;++$i) { $optionlist .= "<option value='$i'>$i</option>"; } $optionlist .= "</select>"; echo "<tr><td>".$DrinkRow['name']." ".$DrinkRow['price']."</td>\n"; echo "<td>$optionlist</td></tr>\n"; } echo "</table>"; ?> </form> <?php } $dranken=array() ; $DrinkResult=mysql_query("SELECT name,price FROM products")or die(mysql_error()); while($DrinkRow=mysql_fetch_assoc($DrinkResult)){ $dranken[] = $DrinkRow; } echo "<table>"; $totaalPrijs = 0; foreach ($dranken as $DrinkRow) { $aantal = $_POST[$DrinkRow['name'] . "_aantal"]; if ($aantal > 0) { $prijsperDrank = $aantal * $DrinkRow['price']; echo $DrinkRow['name'] . " : " . $aantal . " Prijs: " . $prijsperDrank . "</br>"; $totaalPrijs=$totaalPrijs + $prijsperDrank; } } if($totaalPrijs>0){ echo " totaal: " .$totaalPrijs;} ?> </html> |