Provide details and share your research! But avoid. The ob_start () function is a useful tool for buffering your output in your PHP web application. ob_get_clean does two things: it gets the contents of the buffer as a string, and it cleans out the buffer. I'm facing a weird problem when using the Elementor Wordpress Page Builder. We hope this article has been informative and useful in understanding the ob_start () function in PHP. File: smarty_internal_cacheresource_file. Remember you need to clean the output buffer (ob_end_clean();) before the end of the file, or the page content could be outputted twice. I'm using PHP 5. g. 7. 6. Code Examples. phpMy script pushes file to browser for download thus requiring buffer to be clean and headers not sent. ob_get_clean() combines my use of ob_get_contents() and ob_end_clean(). In core WooCommerce, the pagination is added via the woocommerce_pagination () function hooked to woocommerce_after_shop_loop, and the sorting and result counts are output by the woocommerce_result_count () and woocommerce_catalog_ordering () functions. ob_get_clean — 得到当前缓冲区的内容并删除当前输出缓冲区 说明 ¶ ob_get_clean (): string|false 得到当前缓冲区的内容并删除当前输出缓冲区。 ob_get_clean () 实质上是一. 2. Since `ob_get_clean()` accumulates the entire output in memory, dealing with large amounts of data might affect performance and memory usage. In PHP 8. ob_clean () Deletes all of the content from the topmost output buffer. 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. 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. This function will send the contents of the output buffer (if any). Should you wish to use the output from the included file, you should use op_get_contents() , which will return a string of the contents of the buffer. What ob_flush () does is delete everything in the buffer, but keeps the buffer itself so more data can be put into it after the ob_flush () call. Asking for help, clarification, or responding to other answers. There are couple of other ob_ functions for more flexibility. ob_clean() This function removes what is stored in the output buffer. htmlentities () takes an optional third argument encoding which defines encoding used in conversion. If we create buffers. Output Control 함수 목록. Hi, i am using 0. When the. Since using a buffer you dont need to save the require to a variable as the html will be returned by ob_get_clean; Share. The ob_get_clean() function returns the contents of the output buffer and then deletes the contents from the buffer. ob_get_contents() fetches whatever is inside the buffer. 168. . Enough already with the “get_the_content()” jabber. 1 1 1 silver badge. ob_get_clean () básicamente ejecuta ob_get_contents () y ob_end_clean () . Starting Output Buffering. php is just echoed. So, it's crucial to consider. What are the advantages of using this function? Thanks for this useful series. 2. Just call flush whenever you want to force the content to the browser. If you want to integrate a new plugin to sell courses and include the selection option in Tutor LMS > Settings > Monetization, then you can use the tutor_monetization_options filter. ob_start no almacena en el buffer las cabeceras, sino el contenido. Improve this answer. ob_get_contents — Return the contents of the output buffer. If you don't buffer your output, it doesn't seem like it would be possible for a web server to output a Content-Length header. 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). e. 3. g in your shortcode handler. 7. This is what I want to prevent. // We use str_pad () to make the output long enough. ob_get_contents — Return the contents of the output buffer. You have to give the id to report. Definition and Usage. ob_end_clean (): bool. ob_get_flush() — This functions creates combinatorial effects of both ob_get_contents() and ob_end_flush(). If it is greater than zero, php will use the value as boolean true and therefore executes ob_end_clean () what cleans the buffer. ob_end_clean (): bool. ob_get_length — Return the length of the output buffer. ob_get_clean ( ): string|false. Learn more. . Hot Network Questions Can a device that causes memory loss be created with near-modern technology? Play old saved games on new Xbox S Does a proof by induction have to explicitly refer to the principle of mathematical induction?. If multiple output callback functions are active, output is being filtered sequentially through each of them in nesting order. Advantages of output buffering. So why in manual these functions are under control PHP_OUTPUT_HANDLER_CLEANABLE const? I'm confused about using flags in. yeah the php script was adding some whitespaces at the beginning and images files became corrupted on downloading, ob_get_clean() fixed it. Be sure your includes do not already send something to the browser. The output buffer must be. Add a comment | 0 The Problem is, you are replcing tho variables from one source. Basically you just wrap your html in ob_start(); this will return the html as a string so you can echo it. Here are the functions that invoke callback function immediately: ob_clean. php on line 946. I have known for a long time that it closes the buffer and calls both ob_get_contents and ob_end_clean. If you just want to clean the buffer after starting output buffering with. The ob_start () function is a useful tool for buffering your output in your PHP web application. Something like this:. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. 2 with no alternative. ob_flush () is used when you want to flush parts of the page to the client, whereas ob_end_flush () flushes the entire buffer, then destroys the buffer. 3. I am trying to get the browser timezone via JavaScript and capture it in a php variable with ob_start() and ob_get_clean. Ensute si tu as compris ces quelques fonctions, les autres devraient pas être compliquées. Find centralized, trusted content and collaborate around the technologies you use most. Share. That will return the content rather than echo it directly and that you have to do in the case of a WordPress shortcode. So, until browsers begin to show buffered content. Syntax. answered Oct 8. I'm having some trouble because anything I do in the function called by the action hook is always echoed out at the top of the shortcode instead of inside the shortcode where it belongs. Output buffering works by intercepting all output; anything in between ob_start() and ob_end_clear() is intercepted; any output that precedes ob_start() is not. The cool thing about ob_get_clean() is that it executes both ob_get_contents() and ob_end_clean(). com Learn how to use the ob_get_clean () function to get the contents of an output buffer and delete it from the buffer. joson_encode however does just fine, when wp_debug is disabled. Whether the buffer-cleaning functions _should_ invoke the output callback (keeping in mind that in themselves they do not generate. If you are using error_log(), use ob_get_contents() and ob_end_clean() instead of ob_get_clean(). This function does not destroy the output buffer like ob_end_clean () does. 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). 14. 1 Answer Sorted by: 9 This will return the same as your example given : ob_start (); echo 'custom code'; echo 'another line of custom code'; echo 'more code'; return. Capture php output of function call. Well, you shouldn't even be able to do ob_clean(); before ob_start(). The ob_end_flush () function deletes the topmost output buffer and outputs all of its contents. 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 the buffer: ob_implicit_flush() Enables implicit flushing after every output call. 0, PHP 5, PHP 7) ob_get_clean — Get current buffer contents and delete current output buffer Description ob_get_clean ( ) : string Gets the current buffer contents and delete current output buffer. If you make use of ob_start('ob_gzhandler') to let PHP deal with the compression and you then echo ob_get_clean(), you will create an unreliable output. Oct 30, 2010 at 20:39. The output buffer must be started by ob_start with PHP_OUTPUT_HANDLER_CLEANABLE and. The string will be captured and echoed. This is the PHP code:. 2. I'd expect a notice that the buffer wasn't started with the proper PHP_OUTPUT_HANDLER_CLEANABLE flag as per the docs. comes in handy for conditional statements. Hooking on the wp_h. Asking for help, clarification, or responding to other answers. Definition and Usage. and turn off output buffering using the ob_end_clean() function. 現在のバッファの中身を取得し、出力バッファを削除します。 ob_get_clean() は、基本的に ob_get_contents() および ob_end_clean() を同時に実行するのと同じです。 出力バッファを開始するときに、 ob_start() で PHP_OUTPUT_HANDLER_CLEANABLE および PHP_OUTPUT_HANDLER_REMOVABLE フラグを指定する必要があります。Gets the current buffer contents and delete current output buffer. x. corvidmemory. Doesn't prevent ob_end_clean, ob_get_clean or ob_clean calls from being ran. PHP ob_end_clean does not clear buffer. ob_get_flush() return the buffer and immediately output it. First, you can't call a PHP page like that using include_once - the query string will be ignored. So you save a line or two of code. ob_get_contents simply gets the contents of the output buffer since you called ob_start (). Output buffers are stackable, that is, you may call ob_start () while another ob_start () is active. If I remove the ob_end_clean(); the output is hi hi. This attempts to push current output all the way to the browser with a few caveats. This function discards the contents of the output buffer. Lets say this is my script:Wordpress take your content and apply filters to it. The ob_get_length () function returns the length of the topmost output buffer's contents in bytes. 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. 1) ob_flush (), flush () in any combination with other output buffering functions; 2) changes to php. ob_start() starts outbut buffering. ) I started thinking about it after reading. – bjauy May 21, 2012 at 7:41So I need to add an atributte to the shortcode in order to specify a custom filed value inside a loop which in turn is inside the get_template_part specified in the shortcode as follows: function testimonios_shortcode() { ob_start(); get_template_part('testimonios'); return ob_get_clean(); } add_shortcode(. Cách dùng ob start , ob flush (), flush () Trong PHP vốn đã chạy nhanh nay còn có thêm cơ chế cache làm cho ngôn ngữ PHP ngày càng hoàn hảo. If you want the output to come out as it is generated, one solution is to *also* add ob_end_clean() or ob_end_flush() to the beginning of the script:Collectives™ on Stack Overflow. 出力バッファを「フラッシュ（出力）」してから、出力のバッファリングをオフにする。. header () cannot be used once any output has begun. txt file contain a new line - " " at the end, except for the data10. ob_start(); // This is NECESSARY for the next ob_get_clean () to work as intended. Q&A for work. Improve this question. ini settings to reflect that. PHP prior. For example: use function OutputControl\ob_start; use function OutputControl\ob_end_flush; use function OutputControl\ob_get_clean; ob_start (); echo "Hello, world. When I run in terminal php artisan migrate this results in 'Nothing to migrate' when indeed there is nothing to migrate. 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 siteSorry flushblocks(); got left in there by accident, that shouldn't be in the example. ob_flush (): bool. output buffering ob_get_clean not working. Sintaxis: string|false ob_get_clean(); There is a compatibility issue because the Output Buffering has been changed in PHP 8. 1. Definition and Usage. See full list on w3docs. x. ob_get_clean () essentially executes both ob_get_contents () and ob_end_clean () . Whats the point of disabling output to later throw all the output at once? Doesn't this use more memory (server side) and slow downloads (client side) since the download starts only after the. 3. ) 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. Share. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE flag. Esto se utiliza comúnmente para que las páginas puedan enviar cabeceras "después" de haber "enviado" algún contenido (es decir. When I opened the file in notepad, I could see it was just the raw html. We hope this article has been informative and useful in understanding the ob_start () function in PHP. Output can come from any of the following sources:. ob_get_clean — Get current buffer contents and delete current output buffer. You can rate examples to help us improve the quality of examples. Description ¶. I am working on a CSS and JS compiler and need to find a way to list the contents of wp_head() I am trying to get a list of all CSS/JS files and inline CSS on any give page. kub. Make sure you customize your style as per your theme. Esta función desecha el contenido del búfer de salida. The call to ob_get_clean will return the contents of your buffered output. ob_get_clean() return the buffer and empty it. Using ob_get_clean(), there is even a double notice: "ob_get_clean(): failed to delete buffer of default output handler (1)". Share. ob_clean (): void. The short answer is that yes, you have to turn on output buffering before you can use ob_clean. But you have not end the OB then! – Richard. Descripción ¶. 1. answered Oct 2, 2012 at 2:12. ob_end_clean() don't work as intended. Now, let say that output buffer contains a character "a" and headers are not yet sent. 5k 3 3 gold badges 48 48 silver badges 77 77 bronze badges. If we create. x and PHP 5. But of course, these are only a few of the common basics of output buffering. . I pass the. 5. 5. The rocket booster and then the spacecraft. Whereas all my other code that is around the wp_head is indented (tabbed) two times. Without the second ob_start (), the output is 21. 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(). answered May 17, 2012 at 13:57. Shortcodes have to return their. There are couple of other ob_ functions for more flexibility. 1. This function does not destroy the output buffer like ob_end_clean () does. When output buffer is ended it is sent to the client (browser). header is not cleared after executing ob_get_clean. Description ¶. ob_clean (): bool. function test_shortcodes () { return 'Shortcodes are working!'; } add_shortcode ('test_shortcodes', 'test_shortcodes'); I have. ob_get_flush ( ): string|false. 4. php, instead ob_start() and ob_get_clean() are ignored, and the output of links. May 23, 2015 at 9:20. 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. You are entirely right kijin, I edited a bit before your comment. If i remove line with ob_get_clean () ab_id_transakce have correct variable from form input. Whether the buffer-cleaning functions _should_ invoke the output callback (keeping in mind that in themselves they do not generate. 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. get_the_title() and get_the_post_thumbnail(). You might try checking to see if the values are an object first, and then using the PHP function to convert to an array. Removing ob_start() and echo ob_get_clean() returns the same result on the admin page. ob_get_clean() — Similarly, this will be the combination of ob_get_contents() and ob_end_flush(). It executes both ob_get_contents () and ob_end_clean () functions. In theory when I call _insert() function in test. I was trying to debug my code using error_log() and I discovered that ob_get_clean() also truncates the error_log() buffer right in the middle of its output, and well as the output buffer which it is supposed to truncate. This includes information about PHP compilation options and extensions, the PHP version, server information and environment (if compiled as a module), the PHP environment, OS version information, paths, master and local values of configuration options, HTTP headers, and. Usando ob_start le permite mantener el contenido en un buffer del lado del servidor hasta que esté listo para mostrarlo. Calling the function get_the_content () for a post, does not run the filter for shortcodes (if any). output_compression to 0 or Off; 3) setting Apache variables such as "no-gzip" either through apache_setenv () or through entries in . 1 Answer Sorted by: 9 This will return the same as your example given : ob_start (); echo 'custom code'; echo 'another line of custom code'; echo 'more code'; return ob_get_clean (); Share Follow answered May 18, 2017 at 10:53 George Dimitriadis 1,691 1 19 27 Add a comment Your Answer The ob_get_contents () function has different return behaivor in PHP 5. djjjozsi, thank you for your attempt but your code just echoed the ranking. 2. The output may be caught by another output buffer, or, if there are no other output buffers, sent directly to the browser. flush is different in that it asks the web server to output PHP's current internal buffer to the client (browser), but to wait for further output (i. 1. g. ob_get_clean() essentially executes both ob_get_contents() and ob_end_clean(). It is the same as the following statement, which might be better to understand: "If ob_get_level () returns a 'truthy' value (is not 0 but. I think what @toscho tried to say isn't that you can't nest, but that if for some reason you call ob_get_clean() before the code of e. This is referred to as output control. Advantages of output buffering for Web developers. If your JavaScript needs something from the server in order to know to redirect or not, do so via an Ajax request. What is the benefit of passing a callback to ob_start compared to just processing the result of ob_get_clean()? 0. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE flag. 得到当前缓冲区的内容并删除当前输出缓冲区。 ob_get_clean() 实质上是一起执行了 ob_get_contents() 和 ob_end_clean() 。 输出缓冲区必须由带有 PHP_OUTPUT_HANDLER_CLEANABLE 和 PHP_OUTPUT_HANDLER_REMOVABLE flag 的 ob_start() 启动。 否则 ob_get_clean() 将不起作用。Am using the code below to download a file. Q&A for work. ob_get_clean. Thanks for contributing an answer to Stack Overflow! Please be sure to answer. Let's say i have a file consisting of 5 lines of text and every line has 50 chars. Its output is rendered to the 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. Hope that is alright. The problem with this is, that you have “ob_get_clean” outside the “if”, where “ob_start” is. Description ¶. I almost looked around the internet on how to remove newlines in the strings and that's the common and fastest method to remove the newlines aside from using the slowly preg_replace(). ob_clean () Also be aware that nothing is already being flushed with functions like echo, print_r, etc. It looks like the answer is no, there is no single command to get the output buffer and erase it without turning it off. ob_end_clean (): bool. WordPress has great filter support for getting at all sorts of specific bits of content and modifying it before output. The reason I'm not voting for ob_get_clean is because I've had times when other developers get confused regarding what is really going on, the function name doesn't really state that the output buffering will end after it's call. What is the ob_get_length() Function? The ob_get_length() function is a PHP built-in function that allows you to get the length of the output buffer. Descrição ¶. That's related to how the. This function will send the contents of the topmost output buffer (if any) and turn this output buffer off. El búfer de salida debe estar iniciado por ob_start () con el indicador PHP_OUTPUT_HANDLER_CLEANABLE Si no, ob_get_clean () no funcionará. 1 the document fed to dompdf would be pre-processed using PHP's eval() function when DOMPDF_ENABLE_PHP was set to true. 1. Teams. We use ob_end_clean() with ob_get_contents() which first gets the contents as a string and then the output buffer is cleaned and turned off, this clears the global stack and keeps the whole content in a variable to be processed. PHP IN DOMPDF how include ? #1924. Syntax. If not it should be the output-handler you used, check your php. ob_get_clean(); Technical Details. The output buffer contents are returned correctly but if I have a file containing 100 lines of text the output buffer returns empty string (string with value null). Follow answered Mar 1, 2011 at 23:25. Just make sure that you call ob_end_flush () the appropriate number of times. Otherwise ob_get_clean () will not work. This function will send the contents of the output buffer (if any). The way to check for this is through ob_get_level (): echo ob_get_level (); If the result is non-zero. amazing and fast answer, all I needed, thank you, thank you, thank you! Because just accepting your answer is not. 6. Improve this answer. 5. mPDF is a PHP library which generates PDF files from UTF-8 encoded HTML. Best you can do is:. Ada dua fungsi lain yang biasanya Anda pasangkan dengan ob_get_contents():, yang pada dasarnya memberi Anda apa pun yang telah "disimpan" ke buffer sejak dinyalakan ob_start(), dan kemudian ob_end_clean()atau ob_flush(), yang menghentikan penyimpanan dan membuang apa pun yang disimpan, atau berhenti menyimpan dan. ob_srtart begins output buffering. La función ob_get_clean() es una función PHP incorporada que se utiliza para limpiar o eliminar el búfer de salida actual. 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. When I use Artisan::call('migrate') in code (use this in a custom Artisan command) this doesn't return any message. Flags can be used to permit or restrict what the buffer is able to do. As a result, the first ob_start () will have an ob_get_level () of 2, the second will be 3, and so on. yes you need to take Response::make out of image2 function and put ob_end_clean() after imagejpeg. Am on a shared server. The most common is wkhtmltopdf, which is a binary that include Chrome's rendering engine webkit to interpret the page and print the pdf. ob_get_clean ( ): string|false. Hey, no it didn't work Salut, je suis encore en apprentissage de la programmation web notamment avec PHP ou je suis encore novice . Flags can be used to permit or restrict what the buffer is able to do. On development machine sometimes it works but on the test machine it did not work. don't close the connection). – r3wt. fdehanne fdehanne. However, like I mentioned, if the webserver is. console. Two problems. 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. This function discards the contents of the topmost output buffer and turns off this output buffering. 43. The ob_get_contents () function has different return behaivor in PHP 5. Syntax. ob_get_clean, only works twice. This function discards the contents of the topmost output buffer and turns off this output buffering. Capturing PNG stream with PHP output buffer. g. If you say this in PHP: echo 'Hello'; it will result in the string Hello being sent to the browser more or less immediately. ob_get_clean (PHP 4 >= 4. ob_get_clean, c'est comme si tu copiais le contenu de ta feuille sur une autre (donc dans une variable en php) puis après tu jette la feuille. I've got a problem when looping using foreach() loop and inside of this loop using ob_start() and ob_get_clean(). The ob_flush () function outputs the contents of the topmost output buffer and then clears the buffer of the contents. The file was created no problem but when I tried to open the file, it was corrupt. The ob_get_flush () function outputs the contents of the topmost output buffer, returns the contents and the deletes the buffer. A callback function can be passed in to do processing on the contents of the buffer before it gets flushed from the buffer. $image_data = ob_get_contents(); ob_end_clean(); echo $image_data; unlink($nameimage); Client (192. 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. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. The ob_get_contents() function is a useful tool for getting the contents of the output buffer in. The definition should mention that the function also "turns off output buffering", not just cleans it. Follow answered Feb 10, 2017 at 4:10. 0. See the syntax, return value, and examples of this function in PHP. htaccess. Follow. ob_get_contents — Return the contents of the output buffer. So the first thing in your script should be ob_start (). Viewed 2k times. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. So this leads me to think that the notices are. css files; whereas ob_get_flush() returns the contents of both file types. I have a script that echo out content in a php script and resulting in a very large file, e. php, ignoring any *. Something else is causing that. Otherwise ob_clean () will not work. It should really only give you the 1st one. ob_get_length — Return the length of the output buffer. When the component writes it's output directly to the stream you need to code to accommodate that behavior unless you want to rewrite the. 1. Otherwise this function will not work. What I am trying to do to get rid of buffer contents is using ob_end_clean() to empty the buffer completely. The ob_flush () function outputs the contents of the topmost output buffer and then clears the buffer of the contents. The output may be caught by another output buffer or, if there are no other output buffers, sent directly to the browser. 5 Answers. 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. I have tried ob_flush(); and flush() but that doesn't help either. Documentation for ob_get_clean() Share. Collectives™ on Stack Overflow. IE 'some text' is extracted from the buffer and prepared to be returned as per the requirement of the 'get' functionality. ob_get_contents does not clear the buffer so when a script ends it is flushed to the output as usual. Take a look at very simple example for PHP 5. But I was able to manage with just these two. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_FLUSHABLE flag. Conclusion. ob_get_clean() silently discards the buffer contents. According to the manual,. In PHP 8. ini. Tiện ích lọc dữ liệu: Bạn có thể sử dụng ob_start để lọc. Descripción ¶. Using output buffering ( ob_start () / ob_get_contents ()) is a valid way of addressing the problem however you need to move the code. ob_srtart begins output buffering. ob_get_clean, only works twice. Taking ob_start() out of my code seems to make no difference to how it works. ob_get_length() gets the size of the buffer, in bytes. Return Value: Returns a string containing the contents of the buffer: PHP. Here's my function:The ob_get_contents () function has different return behaivor in PHP 5. I'm trying to find a catch-all filter that gives me one last crack at modifying the final markup in its entirety before output. Yes it is possible. echo str_pad ("Hello World!", 4096); // Use flush () to send the string to the browser. If you only want to get data as string and clear buffer use ob_get_clean() You can think of output buffering as creating "bookmarks" or "restore points" in output buffer.