The function will be called when the output buffer is flushed (sent) or cleaned (with ob_flush(), ob_clean() or similar function) or when the output buffer is flushed to the browser at the end of the request. The first function I’m going to cover is ob_end_clean(). Share. Return Values ¶ This will return the contents of the output buffer or false, if output buffering isn't active. Definition and Usage. I'm trying to link to Buddypress groups, and I need the username of the logged in user to do this. The manual page for ob_start() states: "This function will turn output buffering on. ob_get_length — Return the length of the output buffer. A Debug Statement. After this you can move go on - even with only flush () instead of ob_flush (). This function will send the contents of the output buffer (if any). Example Get your own PHP Server. if you take a look at php. I couldn't find any diagrams explaining output buffering on the worldwide-web so I made a diagram myself in Windows mspaint. In order to accomplish that, I created a class that, among other things, creates an image. ob_get_contents — Return the contents of the output buffer. Once again, using [my-info display=”email”] will return only the email section of the information but it will use a span tag with color red to wrap the content. output_callback. One solution on this is to transfer the codes of renal_prescRequest_review. Tôi có 1 ví dụ đơn giản như sau:W3Schools offers free online tutorials, references and exercises in all the major languages of the web. exe. This allows you to capture whatever the script sends as output in a variable: This allows you to capture whatever the script sends as output in a variable:You should first start the output buffering by placing a call to ob_start(); before your inclusion. PHP_OUTPUT_HANDLER_CLEANABLE - Calls to ob_clean(), ob_end_clean() and ob_get_clean() are permitted. Description ¶. My main template file which would have the page layout (header, body, sidebar, footer) is included into the page. php output buffering mask. Basically you just wrap your html in ob_start(); this will return the html as a string so you can echo it. ob_start(); // 출력 결과물을 호출합니다. ob_start () use. Oct 30, 2010 at 20:39. We hope this article has been informative and useful in understanding the ob_start () function in PHP. Find centralized, trusted content and collaborate around the technologies you use most. ob_start(); // This is NECESSARY for the next ob_get_clean () to work as intended. If this function returns more than 0 you are still inside a buffer. Instead of using strip_tags() or any clever trick, I just worked my way backwards from everything that the original function did. Here in this program, we have used OB _ START ( ) function to create the output buffer, and the OB _ END _ CLEAN ( ) function will be used to clear all the data of the created buffer; therefore, only the text outside the B _ START ( ) function and OB _ END _ CLEAN ( ) function will be displayed. This function does not destroy the output buffer like ob_end_clean () does. So this post provides a quick copy/paste example that I can grab the next time I need to output buffer something. The problem is, I call session_start() very early on in my page. Sorry flushblocks(); got left in there by accident, that shouldn't be in the example. After we have loaded Dompdf, all we have to do is pass it the HTML page and display the PDF in the user’s browser. Tôi nhắc đến cơ chế cache vì các hàm ob_start(), ob_get_contents(), ob_clean(), ob_end_flush() sẽ hỗ trợ chúng ta trong quá trình thực hiện cơ chế này. The ob_get_contents() function is a built-in function in PHP that allows you to get the contents of the output buffer. The idea is to not use <?php and ?> tags in the code but rather stand-ins START_PHP and END_PHP, which have no meaning to PHP. The ob_get_clean() function returns the contents of the output buffer and then deletes the contents from the buffer. – bjauy May 21, 2012 at 7:41 Description ¶ ob_get_clean (): string|false Gets the current buffer contents and delete current output buffer. g. Instead of sending content instantly to a client as it is echo 'ed from a script, PHP uses output buffering to hold content until it is flushed at the end of a script. My code calls ob_start() Include WP core, WP initializes all and call ob_start("ob gzhandler") When my code call ob_end_clean() it fails. Using ob_start() and ob_get_clean() allows you to return HTML code from the shortcode. ini or calling ob_end_clean() or ob_end_flush() at the start of the script removes this necessity. Well, you shouldn't even be able to do ob_clean(); before ob_start(). ini settings to reflect that. Parameters ¶ This function has no parameters. Extra set of functions calls, wordpress style, so that "somefunc()" does direct output, and "get_somefunc()" returns the output instead Add an extra parameter to the functions to signal if they should output or return, much like print_r()'s flag. txt file contain a new line - " " at the end, except for the data10. Enabling output buffering decreases the download time it takes and renders the HTML in the browser. It is based on FPDF and HTML2FPDF, with a number of. Output buffering should be taking place inside your shortcode. output_callback. ob_flush — Flush (send) the output buffer. Otherwise ob_get_clean() will not work. Userの配列を通常のvar_dump()でダンプすると、以下の感じ。なお、私の環境はxdebugが入っていて、シンプルな出力形式になっていたことを知った。「xdebugがPHP環境に入っているかどうかでvar_dump()の出力形式が変わる」を参照のこと。Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this sitePHP’s ob_start() and ob_get_clean() are useful for buffering output of printed content and so forth, but I use them very rarely and tend to forget their order/syntax. The ob_get_length () function returns the length of the topmost output buffer's contents in bytes. – Saif Bechan. ), let's assume that we are looping through a set of users (as setup_userdata() fills the global variables of the currently logged in user and isn't useful for this task) and try to display. Steps: Send new value to phpScript1 with clientScript1. Be sure your includes do not already send something to the browser. ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering. Finally, the output buffer can be ended and the output can be sent to the browser using the ob_end_flush() function, or it can be discarded using the ob_end_clean() function. I will verify if there is any . phpI am seeing some behavior from ob_start() and ob_end_*() that seems very counterintuitive. Note: This function is similar to ob_end_flush (), except that this function also returns the buffer as. Before speaking about tags, you should understand how Twig works internally. Return Values ¶ This will. flush () Attempts to send content from the system's output buffer to the browser. Instead of sending content instantly to a client as it is echo 'ed from a script, PHP uses output buffering to hold content until it is flushed at the end of a script. ob_get_flush on the other hand, does everything that ob_get_clean does, but it also outputs the content. 1. you have to use the new aliases instead of using the PHP 7. While output buffering is active no output is sent from the script (other than headers), instead the output is stored in an internal buffer. if you don't call ob_start() again with the ob_gzhandler callback function, the output will not be compressed, but the header will say it is. 5. PHP prior. Function Reference Affecting PHP's Behaviour Output Control Output Control Functions Change language: Submit a Pull Request Report a Bug ob_clean (PHP 4 >= 4. Returns the length of the output buffer contents, in bytes, or false if no buffering is active. I need to re-populate mini-cart when product added via ajax add to cart. Carolina has won 2 out of their last 3 games against Dallas. Function. Actually, we can use type regulation - intval (ob_get_contents ()), for cheking On/Off output buffering, but it lays the possible problems in the future. ob_start() starts outbut buffering. Referral from July 3, 2014 . answered Oct 2, 2013 at 14:38. I need to display html source code form other php file. About the author. Most known loaders are Twig_Loader_Filesystem to open twig code from a file, and Twig_Loader_Array to get twig code directly from a string. 3. You need to comment out only the_time function, not the entire line, or else you will get errors. It’s also used to get the output buffering again after cleaning the buffer. ) of the included file and use the output in a variable (string)?Do you want to return certain values from the included files and use them as a variable in your host script?; Local variables in your included files will always be moved to the current scope of your host script - this. 'someOutput. 5. Everything works normally but the returned HTML structure is broken. I also want to be able to show the user the XML before hand. So any output before an ob_start () will not be affected by the ob_clean (). We then use ob_get_clean to get the contents of the output buffer (which is your template file). The output may be caught by another output buffer or, if there are no other output buffers, sent directly to the browser. This is why it is necessary to use ob_flush() as well as flush(). I'm generating a ton of XML that is to be passed to an API as a post variable when a user click on a form button. If you don't need to echo the output or to do anything with it then just use ob_end_flush () when you are finished. Two problems. x. to wit: given: ob_start(); echo 'before'; ob_start(); echo 'second'; Viewed 2k times. ob_flush (): bool. djjjozsi, thank you for your attempt but your code just echoed the ranking. ob_get_clean() essentially executes both ob_get_contents() and ob_end_clean(). ini involving setting output_buffer and/or zlib. It is based on FPDF and HTML2FPDF, with a number of. ob_get_flush () flushes the output buffer, return it as a string and turns off output buffering. We then include the file which will execute PHP normally. The problem is that sometimes I need the contents of the PHP file 20 - 30 times in 1 call. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_FLUSHABLE flag. Follow edited Jul 13, 2017 at 14:31. php in the file where you want to convert html to pdf. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyDescription ¶. You may execute ob_end_clean() to discard (clean) buffer. html. There is a work-around for the situation you need to get length of the gz-ed buffer. We would like to show you a description here but the site won’t allow us. If you want to further process the buffer's contents you have to call ob_get_contents () before ob_end_clean () as the buffer contents are discarded when ob_end_clean () is called. ini settings to reflect that. Share. But you also need to end and retrieve the contents of the buffer as well. flush (): void. asked:Two problems. One way of outputting a webpage to mPDF without re-writing your scripts too much, is to buffer the output: MpdfMpdf () - Initialise an instance of mPDF class, and specify configuration. php (I hope I can convert the code. While buffering is ON no output is sent from script (other then headers), instead the output is stored in internal buffer. full example . php . Below is the sample code. This function discards the contents of the output buffer. [2013-06-05 20:03 UTC] rewilliams at newtekemail dot com Description: ----- Calling ob_start() with explicit parameters that match the defaults (using null to get past the first one, as documented), the various functions to end output buffering generate notices, which are also added to the buffered content. This function will send the contents of the output buffer (if any). output_compression to 0 or Off; 3) setting Apache variables such as "no-gzip" either through apache_setenv () or through entries in . Not sure I understand the purpose of the output buffer. I want to build a cache system for a e-commerce platform. According to the documentation: ob_get_clean (). 1) ob_flush (), flush () in any combination with other output buffering functions; 2) changes to php. (The same goes for your call to core_function). The ob_get_clean() function is the combination of both ob_get_contents() and ob_end_clean(). Jul 28, 2020 at 7:36. The output buffer must be started by ob_start() with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. this is how I am inlcuding the html template. Basically you just wrap your html in ob_start(); this will return the html as a string so you can echo it. So the browser doesn't receive header correctly. If you want to use it for a larger buffer you have to edit your php. 7. 1. The output may be caught by another output buffer or, if there are no other output buffers, sent directly to the browser. – Chris Carson. Capture HTML output. Description ¶. This is fine in contexts where you're outputting stuff directly, but sometimes you want to use that workflow, but capture the output instead of sending it to the browser. when using ob_start, you want ob_get_contents (and likely ob_get_clean instead). Learning through play in Oak Bay for over 50 years, our preschool is a licensed co-op offering progrSeries History. Learn more about CollectivesYou have to differentiate two things: Do you want to capture the output (echo, print,. output_compres. You may execute ob_end_clean() to discard (clean) buffer. x. Esta función desecha el contenido del búfer de salida en cola y lo desactiva. A timer on the command line, which clears the line every tick, could be construed as follows:คำอธิบายที่ดี ฉันจะไปอีกขั้นหนึ่งแล้วแทนที่ob_get_contents()ด้วยob_get_clean()และลบob_end_clean()เนื่องจากจะob_get_clean()ทำหน้าที่ทั้งสองอย่างเป็นหลัก การ. British Columbia welcomes semi-skilled foreign nationals with in-demand jobs in Canada’s tourism,. The ob_start() function creates an output buffer. Some filters, such as the “body_class” filter, allow us to modify the class names of an HTML element, and some filters have nothing to do with HTML at all. The same approach could be used with other functions and statement that generate output, such as include and require. También se usa para obtener el búfer de salida nuevamente después de limpiar el búfer. 6. ob_start(): ob_start — Turn on output buffering. Return Values. While this is convenient in some situations for generating documents on-the-fly it also exposes a. ob_end_clean (): bool. Otherwise ob_clean () will not work. engine. So, until browsers begin to show buffered content. –It is that the ob_start, ob_get_clean don't work synchronously in the view process causes the problem. You have to give the id to report. I think that function will be prone to further bugs, therefor using ob_start/ob_end_clean is easier to comprehend. Finally, the output buffer can be ended and the output can be sent to the browser using the ob_end_flush() function, or it can be discarded using the ob_end_clean() function. Example: ob_start(); print "foo"; // This never prints because ob_end_clean just empties ob_end_clean(); // the buffer and never prints or returns anything. php,. ob_get_clean () essentially executes both. I would like to know if there is a way for the master script (the one including the others) to tell whether or not the processed output from included script has generated any content. Actually, we can use type regulation - intval (ob_get_contents ()), for cheking On/Off output buffering, but it lays the possible problems in the future. Flushes the system write buffers of PHP and whatever backend PHP is using (CGI, a web server, etc). This will return the length of the contents in the output buffer, in bytes. Return Value: Returns a string containing the. PHP ob_start() function works by catching all output to buffer and then implicitly output this buffer on script end. So, fortunatly there is some php tools that do interpret the page and can fetch any sub files. It is that the ob_start, ob_get_clean don't work synchronously in the view process causes the problem. This function takes a string as a parameter and should return a string. index. ob_start() start output buffering3. creates ellipse with specified coordinates, radius and color. php'; // echo 100MB data $data = ob_get_clean(); file_put_contents($path, $data); Are there any easy way to re-write the. Without the second ob_start (), the output is 21. ob_get_clean() This will return the buffer contents, clean the output buffer, and end output buffering. <?php // 출력 버퍼링을 초기화 합니다. Hot Network Questions ob_flush — Flush (send) the output buffer. One way of outputting a webpage to mPDF without re-writing your scripts too much, is to buffer the output: MpdfMpdf () - Initialise an instance of mPDF class, and specify configuration. if you call ob_end_clean() after ob_start("ob_gzhandler"), the "Content-Encoding: gzip" header will still get sent (assuming the browser supports the encoding). Start buffer; Add stuff to buffer; Return & clean buffer contents; Example: function some_function() { ob_start(); include( plugin_dir_path( __FILE__ ) . 15 votes, 32 comments. 3. Looks like half my answer was hidden due to my misplacement of the code formatting. ob_get_flush () flushes the output buffer, return it as a string and turns off output buffering. ob_start("ob_gzhandler"); ob_start(); Now the second one isn't compressed, I can do whatever I want with it (hence get its content, clean it etc). In theory when I call _insert() function in test. Description ¶. The code from your question has this undesired effect:Here's my problem. ob_start () use. Parameters. I mention the need to both clean and turn off your output buffer. It all works fine on my Windows desktop test machine, but when I run it on the live host ob_get_contents() is empty. ob_clean () Deletes all of the content from the topmost output buffer. ob_clean () will only remove the output after its matching ob_start (). You can't include a query string on the include file. If ob_flush() isn't called at the end of the app, the contents are automatically flushed, again. What is the ob_get_level() Function? The ob_get_level() function is a PHP built-in function that allows you to get the current level of output buffering. The ob_start () of the PHP Programming Language helps in enabling the Output Buffer/Buffering before any type of echoing in any type of some HTML content in the PHP script. This is not always the same as the number of characters because some characters may have more than one byte. another plugin which started the first ob_start() calls ob_get_clean() you'll get unexpected results. We next include the template file. 3. log (ab_id_transakce); return empty variable because there is in php ob_get_clean (). . ob_get_clean returns a string of whatever has entered the output buffer since your ob_start () call and then deletes the contents from the buffer (in this particular example you never set the output of this function to anything, so your code should do nothing). Also, there is another function ob_get_contents() that grabs all of the data gathered since we called ob_start. "Thanks for your comment, but I want to call my function "loadScript()" sometimes with 1 vars for the "use" and sometimes with 5 vars or more for the "use", and I don't know if it is possible to do that (it's why I have put the array for the exemple (but I know that it's not possible with the array) but I search another way to do that, if it's possible of course. Otherwise ob_get_flush () will not work. ob_implicit_flush()To correct that behaviour (or at least to bypass it), open a second output buffer, and leave the one with gzhandler() alone. The output may be caught by another output buffer or, if there are no other output buffers, sent directly to the browser. So the first thing in your script should be ob_start (). You're getting the warning because your script is outputting code before the page headers are sent - meaning you're printing output before the html page. ob_get_clean() is returning the result of the buffer, and THEN cleaning it, triggering the callback which modifies the content. 여기서 출력물을 ob_get_contents로 변수에 저장하고, 버퍼의 내용을 브라우저로 출력하지 않고, 그대로 비우길 원한다면, ob_end_clean를 사용하면 됩니다. In versions of dompdf prior to 0. get_the_title() and get_the_post_thumbnail(). i am using the Gzip commpressionand Zlib commpression to speed up my website I have used below code ob_start("ob_gzhandler"); in common file that are include on all pages and lib. PHP Output Buffering Example. WordPress Shortcode with ob_start() This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. An optional output_callback function may be specified. Sorry to resurrect a 4 year old post, but I stumbled across it and wanted to point out that ob_get_contents() followed by ob_clean() is not exactly the same as ob_get_clean(). Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. Follow. . 3. Currently, if I use: ob_start(); echo date_i18n('d M Y', $Just curious what your thoughts are on this. ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering. Add a comment | 6 Specifically to Test code or tested code did not (only) close its own output buffers. I'm facing a weird problem when using the Elementor Wordpress Page Builder. Parameter-Liste. Note: This function is similar to ob_end_flush (), except that this function also returns the. I am using ob_start() and ob_get_contents() to setup a cache. I use ob_start, ob_get_clean -- I don't think there's a WP function for this. If you want to further process the buffer's contents you have to call ob_get_contents () before ob_flush () as the buffer contents are discarded after ob_flush () is called. The ob_start () function is a useful tool for buffering your output in your PHP web application. php"; include "view/contact. The value set by ob_get_clean shows as a string, but when I try to cast it to. Definition and Usage. To start things off properly, this appears to do: Sometimes, ob_get_level () may be off by 1 because at the start of the script, it will return 1 even if ob_start () has never been called (and clearing the output buffer via ob_end_clean () and the like can be done without error). Start Your Journey Entry Level and Semi-Skilled Category. This function takes a string as a parameter and should return a string. This is typically done using the ob_get_contents() and ob_end_clean() functions, respectively. ob_get_clean () remove value of input. ob_get_clean() combines my use of ob_get_contents() and ob_end_clean(). . If you want to further process the buffer's contents you have to call ob_get_contents () before ob_end_clean () as the buffer contents are discarded when ob_end_clean () is called. Actually, we can use type regulation - intval (ob_get_contents ()), for cheking On/Off output buffering, but it lays the possible problems in the future. Sintaxis: string|false ob_get_clean();ob_start(); debug_print_backtrace(); error_log(ob_get_clean()); This uses PHP’s built-in buffer as well as the previously mentioned error_log() function to provide insight as to the source of errors produced by an application. ob_get_clean — Get current buffer contents and delete current output buffer. ob_get_status — Get status of output buffers. Álvaro. ob_get_clean () básicamente ejecuta ob_get_contents () y ob_end_clean () . PHP_OUTPUT_HANDLER_FLUSHABLE - Calls to. . PHP may be configured to automatically create an output buffer when the script begins, which is why the buffer level may be 1 without calling ob_start (). html. Just make sure that you call ob_end_flush () the appropriate number of times. It’s actually very simple: ob_start(); // start output. My script pushes file to browser for download thus requiring buffer to be clean and headers not sent. PHP_OUTPUT_HANDLER_CLEANABLE - Calls to ob_clean(), ob_end_clean() and ob_get_clean() are permitted. The ob_get_contents () function has different return behaivor in PHP 5. I think I'll better send the output in an HTML file using the code you provided me. The ob_start () function don’t accepts any parameter specifically but it works by accepting some optional parameters. So, for example, maybe the user's. Facebook Twitter. Since the 2 statements follow eachother here, you're not intercepting anything at all. I'm making my first plugin and I have a problem with displaying my shortcode. The output buffer, on the other hand, will catch all output that takes place after ob_start() including (HTML) output of any warnings or errors you might have in the code before you call ob_get_contents(); Usually, if you just need to format a string with HTML, just use HEREDOC or regular string notation. Store new value with phpScript1. The ob_get_clean() function is an in-built PHP function that is used to clean or delete the current output buffer. . 3. Description ¶ ob_get_clean (): string|false Gets the current buffer contents and delete current output buffer. Table of Contents flush — 출력 버퍼를 비웁니다 ob_clean — 출력 버퍼를 지웁니다 ob_end_clean — 출력 버퍼를 지우고 출력 버퍼링을 종료 ob_end_flush — 출력 버퍼를 전송하고 출력 버퍼링을 종료 ob_flush — 출력 버퍼를 전송합니다 ob_get_clean — 현재 버퍼. The most common is wkhtmltopdf, which is a binary that include Chrome's rendering engine webkit to interpret the page and print the pdf. To do this correctly you should be doing ob_start() after ob_get_clean() because ob_get_clean() gets the current buffer contents and delete the current output buffer. 3. ob_ get_ clean; ob_ get_ contents; ob_ get_ flush; ob_ get_ length; ob_ get_ level. When the. I don't want to write repeating content in all pages and load it automatica. When you call ob_get_contents() after echoing "Galaxy", you're getting the contents of that third buffer. ob_get_clean (): string. 3. Here’s an example. (PHP 4 4. 1 Answer Sorted by: 0 I was surprised by it as well, and the documentation could be more clear about this. Handling ressources easily. I've choosed to use ob_start('callback') and ob_end_flush() at the end of the page. The problem with this is, that you have “ob_get_clean” outside the “if”, where “ob_start” is. – Cain Nuke Jun 25, 2019 at 23:37I have since learned that ob_get_contents() does not fire the callback, but have tried ob_get_clean() & ob_get_flush() to no avail as well. That means that when any PHP script starts, the first 4096 bytes of output get buffered (in a buffer flushable with ob_flush()). The contents of this internal buffer may be copied into a string. I think in this case they mean the same thing. There are a number of functions related to output buffering, but the two we’ll use are ob_start and ob_get_clean. If i remove line with ob_get_clean () ab_id_transakce have correct variable from form input. Returns all content captured by ob_start() ob_end_clean() Empties the output buffer and turns it off for the current nesting level: ob_get_clean() Triggers both ob_get_contents() and ob_end_clean() ob_get_level() Returns the current nesting level of the output buffer: ob_flush() Flush the content buffer and send it to the browser without ending. One thing I have noticed here is sleep() function in combination with ob_start() and - THERE IS NO - ob_start() anywhere in the full code example, yet there is flush() and ob_flush(). Definition and Usage. You signed out in another tab or window. Now, let say that output buffer contains a character "a" and headers are not yet sent. Provide details and share your research! But avoid. I am using ob_start() and ob_get_contents() to setup a cache. 0. Returns either the standard message for UI or the Ajax message. The function will be called when the output buffer is flushed (sent) or cleaned (with ob_flush(), ob_clean() or similar function) or when the output buffer is flushed to the browser at the. The output buffer must be started by ob_start with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. but without using ob_get_clean(); and shortcode, i can get output like this :. Before you downvote, the reason I added this as an answer and not a comment is I don't have sufficient reputation to comment. This function discards the contents of the topmost output buffer and turns off this output buffering. imagefilledellipse. According to the manual,. ob函数用于web场景，比如： 脚本未结束前（可能脚本执行时间较长），先输出部分内容La función ob_get_clean() es una función PHP incorporada que se utiliza para limpiar o eliminar el búfer de salida actual. htaccess. Returns the length of the output buffer contents, in bytes, or false if no buffering is active. ob_gzhandler — ob_start callback function to gzip output buffer. If you just want to clean the buffer after starting output buffering with. Improve this answer. คำอธิบายที่ดี ฉันจะไปอีกขั้นหนึ่งแล้วแทนที่ob_get_contents()ด้วยob_get_clean()และลบob_end_clean()เนื่องจากจะob_get_clean()ทำหน้าที่ทั้งสองอย่างเป็นหลัก การ. What are the advantages of using this function? Thanks for this useful series. Using return: function foo () { return 'abc'; } echo foo (); Using ob_get_clean. Like this. I have known for a long time that it closes the buffer and calls both ob_get_contents and ob_end_clean. Otherwise ob_clean () will not work. ini and try to set it's value to "none" if possible. x and PHP 5. If you still get errors, post them so we can figure it out. it will work as you would use ob_start with no. Probably you are using a buffering function in output buffering callback which isn't possible as mentioned in php ob_start output_callback documentation.