When the. Obtiene el contenido del búfer actual y elimina el búfer de salida actual. ob_get_clean () exécute successivement ob_get_contents () et ob_end_clean. Enabling output buffering decreases the download time it takes and renders the HTML in the browser. 4 ob_* functions. ob_start (); $ attributes = shortcode_atts (array ( 'id' = > 'value', ), $ atts); // your desired code return ob_get_clean. 6. And by that you can put the variable content into your json data. php: SFWD_CPT_Instance::template_content () Generate output for courses, lessons, topics, quizzes Filter callback for ‘the_content’ (wp core filter)In this article, we will take an in-depth look at the ob_get_level() function and its usage. The ob_clean () function deletes all of the contents of the topmost output buffer, preventing them from getting sent to the browser. Here is sample php code snippet for function call. So, it's crucial to consider. Sorted by: 1. Total. php: ob_end_flush() stops header() from working. - The shutdown function would call ob_get_clean() again, and write the result to watchdog. ob_get_clean — Get current buffer contents and delete current output buffer. Output can come from any of the following sources:. 2. Here at first, inside of the PHP tags, a. 1,658 1 1 gold badge 16 16 silver badges 32 32 bronze badges. 1. もしダウンロード処理までに出力バッファがあった場合、 ob_end_flush () を使うと、そのバッファの中身が出力されます。. Two problems. 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. ob_get_flush() — This functions creates combinatorial effects of both ob_get_contents() and ob_end_flush(). Si fuera necesario continuar procesando el contenido del búfer, se ha de llamar a ob_get_contents () antes que a ob_end_clean (), ya que el contenido del búfer es desechado cuando se llama a ob_end_clean () . The output may be caught by another output buffer or, if there are no other output buffers, sent directly to the browser. By understanding the syntax and usage of the function, you can easily start output buffering and modify your output before sending it to the client. 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. it will work as you would use ob_start with no. If you want, use output buffering with ob_start() and ob_get_clean() to get the output contents into a string which you can then use to fill out Content-Length. 100MB Currently I use the following way to capture the output and write to another file ob_start();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(). –As posts get their data set up via the_post() (respectively via setup_postdata()) and are therefore accessible through the API (get_the_ID() for e. You would call this function last in the output buffering process because if you need to get or send the content stored in the output buffer, calling ob_clean() would clean the contents of the output buffer and there won't be any content to receive or send. ini. 2. There's a limit to how much there can be buffered which by default is 4KB so you are hitting the maximum with your script. 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. I actually wrote the function with with ob_get_clean(), however I switched it to ob_get_flush() as the later worked more reliably, i. Yes it's exiting before reaching to ob_get_clean. Improve this question. But before returning the code to the caller, do the necessary text substitution. php error-handlingW3Schools offers free online tutorials, references and exercises in all the major languages of the web. Follow answered Feb 10, 2017 at 4:10. 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. Conclusion. Collectives™ on Stack Overflow. Descripción ¶. Provide details and share your research! But avoid. We hope this article has been informative and useful in understanding the ob_start () function in PHP. Description ¶. ob_get_clean() gets the buffer content, cleans the buffer and ends the buffering. The short answer is that yes, you have to turn on output buffering before you can use ob_clean. 3. exe. Just make sure that you call ob_end_flush () the appropriate number of times. Ver también. 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. Lets say this is my script:Wordpress take your content and apply filters to it. 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。. Conclusion. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. Thanks Anyway! :) php; while-loop; Share. This function does not destroy the output buffer like ob_end_flush. x and PHP 5. Learn more about CollectivesThe 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 value set by ob_get_clean shows as a string, but when I try to cast it to an int in php, the value goes to 0. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE flag. ob_get_clean()函数是ob_get_contents()和ob_end_clean()的组合。 用法: string|false ob_get_clean(); 参数：它不接受任何参数。 返回值：该函数返回输出缓冲区的内容并结束输出缓冲。如果输出缓冲未激活，则返回false。 范例1：以下是ob_get_clean()函数的简单示例。HEREDOC (<<<) is just another way to write a string data into a variable. Also, regardless of the use or warnings related to ob_clean, I'm still seeing the notices make their way through to the response, so a check won't affect the results. 3. Best you can do is:. I'd expect a notice that the buffer wasn't started with the proper PHP_OUTPUT_HANDLER_CLEANABLE flag as per the docs. Stacking Output Buffers. Removing ob_start() and echo ob_get_clean() returns the same result on the admin page. 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. . Share. But in genereal this code is strange, why there is a return? how do you access this code? why is there even. However, like I mentioned, if the webserver is. If you look at the source for these. If you are using error_log(), use ob_get_contents() and ob_end_clean() instead of ob_get_clean(). yeah the php script was adding some whitespaces at the beginning and images files became corrupted on downloading, ob_get_clean() fixed it. Share. function test_shortcodes () { return 'Shortcodes are working!'; } add_shortcode ('test_shortcodes', 'test_shortcodes'); I have. Show file. The output buffer must be started by ob_start with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. When I run in terminal php artisan migrate this results in 'Nothing to migrate' when indeed there is nothing to migrate. However, it is possible that you have output buffering enabled for all files through the output_buffering ini parameter (see the manual ). I am writing a plugin that requires a large chunk of html. it will work as you would use ob_start with no. 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. . From PHP 5. oh my god @Paul Norman. WordPress uses get_ for returning almost any function inside the loop without echoing out to the browser. Turning on output buffering alone decreases the amount of time it takes to download and render our HTML because it's not being sent to the browser in pieces as PHP processes. ob_clean says: The output buffer must be started by ob_start() with PHP_OUTPUT_HANDLER_CLEANABLE flag. If I run something like: while (ob_get_level () > 0) { ob_end_clean (); } Then I can successfully run ob_start () with the ob_gzhandler callback. This function will send the contents of the output buffer (if any). mPDF is a PHP library which generates PDF files from UTF-8 encoded HTML. I need to re-populate mini-cart when product added via ajax add to cart. It shows in the top all the time but I have read some about ob_start(); and trying to use it but the shortcode just returns nothing. In this circumstance, the view process echoes the content of site first anomalously before the response sends cookie, headers, and content. It looks like the answer is no, there is no single command to get the output buffer and erase it without turning it off. Note, this section of your code:Capture HTML output. patch This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. ob_get_contents(); ?> flush 함수는 출력물을 브라우저로 보내고, 출력 버퍼를 비우는 역할을 하지만, 서버나 클라이언트에 영향을 주지 않습니다. 6. 既にob_start()で項で使用していましたが、ob_get_clean()は、ob_get_contents()とob_end_clean()と合体させたような便利な関数です。 1行でバッファと取得と既存のバッファの削除が同時に行える ため、汎用的に使用します。Even though it is a recommended practice in Wordpress to have functions that return values, it is not always possible, especially when you are calling another function that writes it's output directly to the stream. cls. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. ob_flush ( void ) : void. Why is ob_get_contents not working. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE flag. Share. Hi, we were using html_output() to get all the tags generated by the SEO Framework 4. ini involving setting output_buffer and/or zlib. ob_end_flush (): bool. Without the second ob_start (), the output is 21. I think that function will be prone to further bugs, therefor using ob_start/ob_end_clean is easier to comprehend. 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();. Definition and Usage. Teams. Learn more about CollectivesCollectives™ on Stack Overflow. 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. 168. Answer to your both the question lies in output buffer(ob), Hope this will help you out in understanding. function test_shortcodes () { return 'Shortcodes are working!'; } add_shortcode ('test_shortcodes', 'test_shortcodes'); I have. 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 フラグを指定する必要があります。指定しなければ、 ob_get_clean() は動作しません。 With output buffering, your HTML is stored in a variable and sent to the browser as one piece at the end of your script. ob_start (); echo 111, PHP_EOL; echo "aaaa", PHP_EOL; ob_end_clean (); 相信有不少小夥伴應該見過 ob_start () 這個函數，它的作用就是開始一段輸出緩衝控制。. imagejpeg outputs an image. To review, open the file in an editor that reveals hidden Unicode characters. This attempts to push current output all the way to the browser with a few caveats. 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. The way to check for this is through ob_get_level (): echo ob_get_level (); If the result is non-zero. it will work as you would use ob_start with no. A callback function can be passed in to do processing on the contents of the buffer before it gets flushed from the buffer. to wit: given: ob_start(); echo 'before'; ob_start(); echo 'second';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. The ob_get_clean() function returns the contents of the output buffer and then deletes the contents from the buffer. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_FLUSHABLE flag. WordPress has great filter support for getting at all sorts of specific bits of content and modifying it before output. Hope that is alright. ob_clean() This function removes what is stored in the output buffer. And that's not a rare occurrence either, difficult to track down when it happens. 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. 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. Otherwise ob_clean () will not work. PHP ob_end_clean does not clear buffer. ob_end_clean (): bool. 4 ob_* functions. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Starting Output Buffering. An optional output_callback function may be specified. Advantages of output buffering for Web developers. This function discards the contents of the output buffer. Ensute si tu as compris ces quelques fonctions, les autres devraient pas être compliquées. 22. Esta función desecha el contenido del búfer de salida. Learn more about TeamsIt is that the ob_start, ob_get_clean don't work synchronously in the view process causes the problem. 4. –W3Schools offers free online tutorials, references and exercises in all the major languages of the web. He just warns that you should really only use it if there is no other way as there are drawbacks which you might. It says that use of flush() and ob_flush() will cause the data to go in memory until it's displayed and as such that its not good for server with limited resources. So, fortunatly there is some php tools that do interpret the page and can fetch any sub files. Otherwise ob_clean () will not work. This function discards the contents of the topmost output buffer and turns off this output buffering. ob_get_clean(); Technical Details. By understanding the syntax and usage of the function, you can easily clear the output buffer to start fresh. ob_get_contents — Return the contents of the output buffer. The ob_start () function is a useful tool for buffering your output in your PHP web application. Add a comment | Your Answer Thanks for contributing an answer to Stack Overflow! Please be sure to answer. Return. Hi, we were using html_output() to get all the tags generated by the SEO Framework 4. ob_clean (): bool. The ob_flush () function outputs the contents of the topmost output buffer and then clears the buffer of the contents. ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering. Outputs a large amount of information about the current state of PHP. We hope this article has been informative and useful in understanding the ob_clean () function in PHP. output_compression to 0 or Off; 3) setting Apache variables such as "no-gzip" either through apache_setenv () or through entries in . Note : The output buffer must be started by ob_start() with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. 1 the document fed to dompdf would be pre-processed using PHP's eval() function when DOMPDF_ENABLE_PHP was set to true. You don't see anything because you're assigning the content to $out but then you don't do anything with that value. When the. 5. echo str_pad ("Hello World!", 4096); // Even though the script is still running, the. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE flag. It executes both ob_get_contents () and ob_end_clean () functions. 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 (). Oct 16, 2014 at 16:02. ob_get_clean() When ob_end_clean() is called, it turns off buffering. 1. Otherwise ob_get_clean () will not work. 13 of php on MAMP and saw the same problem. For static files it can check the filesize, but for dynamic files that send output a little by little there is no way to know how many bytes it is going to output. ob_flush — Flush (send) the output buffer. If we create buffers. Capture php output of function call. this is how I am inlcuding the html template in my shortcode function. Use of ob_start() and ob_get_clean() 0. ob_get_clean() gets the buffer content, cleans the buffer and ends the buffering. While returning from the function you have to use ob_start() and ob_get_clean() then alone you can get the result in the place where you need. 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). ob_get_clean essentially executes both ob_get_contents and ob_end_clean (). No examples exist of running ob_get_clean within a while loop, and for my purpose there is no alternative. 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 ordering is important: ob_flush() flushes PHP's buffers, flush() then tells Apache to flush it too. IE 'some text' is extracted from the buffer and prepared to be returned as per the requirement of the 'get' functionality. Esto se utiliza comúnmente para que las páginas puedan enviar cabeceras "después" de haber "enviado" algún contenido (es decir. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. También se usa para obtener el búfer de salida nuevamente después de limpiar el búfer. This function does not destroy the output buffer like ob_end_flush. My main template file which would have the page layout (header, body, sidebar, footer) is included into the page. 1. We would like to show you a description here but the site won’t allow us. If you are using error_log(), use ob_get_contents() and ob_end_clean() instead of ob_get_clean(). Find centralized, trusted content and collaborate around the technologies you use most. corvidmemory corvidmemory. Whether the buffer-cleaning functions _should_ invoke the output callback (keeping in mind that in themselves they do not generate. File: smarty_internal_cacheresource_file. The output buffering functions are also useful in hackery to coerce functions that only print to return strings, ie. For example, if the page you want to render to PDF can be accessed via a web server then you can just load that page in your Dompdf script:ob_get_clean (PHP 4 >= 4. 2. – Raj. 'options' => apply_filters('tutor_monetization_options', array( //add new monetization options here 'free' => __('Disable Monetization', 'tutor'), )), return apply. Otherwise I would use them in the shortcode handler, no use to put them in theme. A callback function can be passed in to do processing on the contents of the buffer before it gets flushed from 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. ob_flush. So, the functions ob_start(); ob_get_contents(); and ob_end_clean(); don't work. そうすると、出力. The ob_start () function is a useful tool for buffering your output in your PHP web application. Try using output buffer like this : ob_start (); // your includes echo ob_get_clean (); Use this in all of your includes, and you will not get any errors. Output a string to the browser before the script has finished running: <?php. 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. Collectives™ on Stack Overflow – Centralized & trusted content around the technologies you use the most. ob_get_clean essentially executes both ob_get_contents and ob_end_clean. There is a compatibility issue because the Output Buffering has been changed in PHP 8. This function discards the contents of the topmost output buffer and turns off this output buffering. answered May 17, 2012 at 13:57. " Actually, the callback function, once set by ob_start (), will be called regardless. What you can do is to do an explicit ob_start() again in the beginning of the script so you get a second buffer as they can be nested. 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?. Gets the current buffer contents and delete current output buffer. ob_clean () Also be aware that nothing is already being flushed with functions like echo, print_r, etc. ob_get_clean ( ): string|false. ob_get_length — Return the length of the output buffer. If we create. Since `ob_get_clean()` accumulates the entire output in memory, dealing with large amounts of data might affect performance and memory usage. 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. ob_clean (): bool. If you want to use it for a larger buffer you have to edit. Follow edited Oct 8, 2014 at 1:22. I think in this case they mean the same thing. ob_flush (): bool. To close all layers an prevent problems, do the following: while (@ob_end_clean ()) { // do nothing } This will delete all layers. // We use str_pad () to make the output long enough. The code is sorta lik. 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. It would be better to place all your output in the included file in a function that stores everything in a variable that is returned by the function. Using output buffering ( ob_start () / ob_get_contents ()) is a valid way of addressing the problem however you need to move the code. This function will send the contents of the output buffer (if any). ob_get_clean () is a function that gets the current output buffer contents and deletes it. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. ob_get_clean() silently discards the buffer contents. This is what I want to prevent. Advantages of output buffering. Descrição ¶. htaccess. It works only if the output buffer is started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. PHP ob_end_clean does not clear buffer. x. Flags can be used to permit or restrict what the buffer is able to do. So, until browsers begin to show buffered content. ob_end_clean (): bool. – 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(. Hooking on the wp_h. Further, with json-data as response, you need to use dataType: 'json' in your ajax call:I am using ob_get_clean in a script that is called by ajax. ob_get_status() returns status information on either the top level output buffer or all active output buffer levels if full_status is set to true. It seems like MAMP is not performing the function 'ob_get_clean()' correctly. Lo tienes al revés. No, this is not a correct use for ob_start(). 4. I wrote these two simple (and hacky) scripts to demonstrate. When output buffer is ended it is sent to the client (browser). If you just want to clean the buffer after starting output buffering with. Capture php output of function call. Essentially, an output buffer in PHP catches anything that would have been output to the browser (excluding headers). 1. There are two ways that I can think of at this moment. ob_get_clean — Get current buffer contents and delete current output buffer. ob_get_length — Return the length of the output buffer. This code adds wp_nav_menu_items wordpress hook. Im novice so i dont understand what this doing. The output may be caught by another output buffer or, if there are no other output buffers, sent directly to the browser. $image_data = ob_get_contents(); ob_end_clean(); echo $image_data; unlink($nameimage); Client (192. Definition and Usage. I couldn't find any diagrams explaining output buffering on the worldwide-web so I made a diagram myself in Windows mspaint. Description ¶. ), 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. Code Examples. As a result, the first ob_start () will have an ob_get_level () of 2, the second will be 3, and so on. There are couple of other ob_ functions for more flexibility. If it takes 10 seconds for that page to load, rather than seeing a new line every 2 seconds, then it means that it is being cached by your webserver. add_filter('wp_nav_menu_items', 'crunchify_add_login_logout_menu', 10, 2);2. Une des plus pratique est ob_get_contents qui permet de récupérer le contenu du tampon de sortie dans une. The output may be caught by another output buffer or, if there are no other output buffers, sent directly to the browser. Connect and share knowledge within a single location that is structured and easy to search. There are a number of functions related to output buffering, but the two we’ll use are ob_start and ob_get_clean. Edson's code works because the output buffer did not automatically get flushed because it doesn't exceed the buffer size (and the script isn't terminated obviously before the. Whether the buffer-cleaning functions _should_ invoke the output callback (keeping in mind that in themselves they do not generate. 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. Other functions are all working fine e. 1. This function does not destroy the output buffer like ob_end_clean () does. Sintaxis: string|false ob_get_clean(); There is a compatibility issue because the Output Buffering has been changed in PHP 8. When I opened the file in notepad, I could see it was just the raw html. ob_get_flush() return the buffer and immediately output it. ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering. 3. Gets the current buffer contents and delete current output buffer. Learn more about CollectivesWhen using PHP as the back-end for SSE (Server Sent Events) and similar server streaming solutions, I have been using the @ob_flush();@flush() idiom to make sure the data gets spat out immediately. ob_get_contents simply gets the contents of the output buffer since you called ob_start (). djjjozsi, thank you for your attempt but your code just echoed the ranking. Place the buffer start before your output begins and the buffer content capture and clean after the output is complete and then save the content to a cache file… Buffering also allows headers() to be implemented after output has began. Improve this answer. Connect and share knowledge within a single location that is structured and easy to search. Output buffering should be taking place inside your shortcode callback. 0. ob_get_clean(): Three Birds, One Stone. ob_clean() - Xóa tất cả nội dung của bộ đệm đầu ra trên cùng. We next include the template file. Parameters. So the first thing in your script should be ob_start (). Description ¶. I'm using PHP 5. ob_flush does not work on my server. If you want to capture instead of echoing, you should use ob_get_clean () – kijin. Probably you are using a buffering function in output buffering callback which isn't possible as mentioned in php ob_start output_callback documentation. Learn more about Labs ob_get_clean and ob_get_contents return content to screen instead of putting it into variable when used with var_dumpHandling ressources easily. The ob_get_level () function indicates how many output buffers are currently on the stack. 0. So the fix I’m suggesting is this:So the original code was without the action? if thats the case you have a ob_get_clean() after a return, return, well, returns the value (in this case a json string) and stops there, no other code after return is being executed. How to Use the ob_get_length() Function. If not it should be the output-handler you used, check your php. This is not always the same as the number of characters because some characters may have more than one byte. If you want to further process the buffer's. Find centralized, trusted content and collaborate around the technologies you use most. g. ob_get_flush () flushes the output buffer, return it as a string and turns off output buffering. This function takes a string as a parameter and should return a string. ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering. Also, there is another function ob_get_contents() that grabs all of the data gathered since we called ob_start. Description ¶. La función ob_get_clean() es una función PHP incorporada que se utiliza para limpiar o eliminar el búfer de salida actual. 4. I understand that you should not want to handle this kind of errors in your own code since it has to be clean & tested but still you might get some, e. Q&A for work. This function does not destroy the output buffer like ob_end_clean() does. ob_clean () Also be aware that nothing is already being flushed with functions like echo, print_r, etc. For the OP's purposes, it's probably fine, but ob_get_clean() ends output buffering while ob_get_contents() and ob_clean() do not. ob_end_clean (): bool. Viewed 2k times. 5. i dont know how you can get the gd2 resource into an object you can pass to Response::make. 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. Before you downvote, the reason I added this as an answer and not a comment is I don't have sufficient reputation to comment. The ob_flush () function outputs the contents of the topmost output buffer and then clears the buffer of the contents. 2.