This function does not destroy the output buffer like ob_end_clean () does. gif";. ob_get_clean. Otherwise ob_get_flush () will not work. By understanding the syntax and usage of the function, you can easily clear the output buffer to start fresh. // We use str_pad () to make the output long enough. But you also need to end and retrieve the contents of the buffer as well. 5. 2. to wit: given: ob_start(); echo 'before'; ob_start(); echo 'second'; PHP マニュアル：ob_end_flush. php is just echoed. ) I started thinking about it after reading. I assume that is the underlying part of Intervention too, but you can see the issues lies with how to deal with. 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 siteNoted, and I understand that. This function does not destroy the output buffer like ob_end_flush. Hooking on the wp_h. d4rkpr1nc3. 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. Im novice so i dont understand what this doing. ob_start(); // This is NECESSARY for the next ob_get_clean () to work as intended. output_compression to 0 or Off; 3) setting Apache variables such as "no-gzip" either through apache_setenv () or through entries in . This function does not destroy the output buffer like ob_end. I think that function will be prone to further bugs, therefor using ob_start/ob_end_clean is easier to comprehend. Share. g. 6. There is some things I dont get about end_clean, clean, get_clean, etc, and therefore, the answer is going to be different and nuanced from the other one. This function will send the contents of the output buffer (if any). If you just want to clean the buffer after starting output buffering with. Otherwise ob_get_clean() will not work. 2. . ob_get_clean ( ): string|false. Just wanted to get this out there in case anyone needed it. 2. " Actually, the callback function, once set by ob_start (), will be called regardless. ob_get_clean() gets the buffer content, cleans the buffer and ends the buffering. Ver también. oh my god @Paul Norman. Description ¶. 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. The output buffer must be started by ob_start with PHP_OUTPUT_HANDLER_FLUSHABLE flag. 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. –I am assuming the data displays properly on the site itself and the browser shows your pages are UTF-8. 3. ob_end_clean (): bool. Learn more about TeamsIt is that the ob_start, ob_get_clean don't work synchronously in the view process causes the problem. Code Examples. There are a number of functions related to output buffering, but the two we’ll use are ob_start and ob_get_clean. ob_get_length — Return the length of the output buffer. ob_end_clean () Deletes the topmost output buffer and all of its contents. However, casting to number should ignore regular leading spaces. cls. –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. Calling the function get_the_content () for a post, does not run the filter for shortcodes (if any). Yes, it's wordpress, but I need to do my task exactly manually, not with plugins, and I want to learn that library, it seems to be a good thing. If multiple output callback functions are active, output is being filtered sequentially through each of them in nesting order. send_test_email( 122, '[email protected]' ); /*. I've got a problem when looping using foreach() loop and inside of this loop using ob_start() and ob_get_clean(). PHP IN DOMPDF how include ? #1924. It's useful in cases where you may need to filter some output, or you're using a PHP method (such as var_dump) that writes output. I have known for a long time that it closes the buffer and calls both ob_get_contents and ob_end_clean. ob_get_contents — Return the contents of the output buffer. Oct 30, 2010 at 20:39. However a few years ago I was having errors that required me call both get_clean and flush. Q&A for work. See full list on w3docs. See parameters, return values, examples and user notes. Esta función no destruye el búfer de salida como lo hace ob_end_clean () . 1) ob_flush (), flush () in any combination with other output buffering functions; 2) changes to php. Connect and share knowledge within a single location that is structured and easy to search. djjjozsi, thank you for your attempt but your code just echoed the ranking. 4. ob_end_flush () Deletes the topmost output buffer and outputs its contents. ob_get_flush() — This functions creates combinatorial effects of both ob_get_contents() and ob_end_flush(). Neither discarding the buffer's contents (ob_clean() ob_end_clean(), ob_get_clean()) nor retrieving the current buffer contents (ob_get_contents(), ob_get_clean()) invoke the output callback. 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. Definition and Usage. Follow. Send content immediately to the browser on every statement which produces output: <?php. log (ab_id_transakce); return empty variable because there is in php ob_get_clean (). get_the_title() and get_the_post_thumbnail(). Definition and Usage. The output buffer must be started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE flag. Output a string to the browser before the script has finished running: <?php. ob_start (); $ attributes = shortcode_atts (array ( 'id' = > 'value', ), $ atts); // your desired code return ob_get_clean. Otherwise ob_clean () will not work. 1. x and PHP 5. I'm facing a weird problem when using the Elementor Wordpress Page Builder. The call to ob_get_clean will return the contents of your buffered output. 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. However, like I mentioned, if the webserver is. 0. For what you are trying to do, there is no need to use ob_start and ob_flush. Capture php output of function call. (PHP 4 4. 0, but it seems that the function is deprecated in 4. Hot Network Questions Voltage change on Resistor change (TinkerCad) Does the escape velocity formula take into account how a gravitationally bound object's distance to its primary increases before coming back down?. Description ¶. Follow edited Oct 8, 2014 at 1:22. Starting from ob_start(); to ob_end_clean(); nothing will be printed, I. Here at first, inside of the PHP tags, a. WordPress has great filter support for getting at all sorts of specific bits of content and modifying it before output. ob_clean() This function removes what is stored in the output 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. Asking for help, clarification, or responding to other answers. ) The buffer is limited in size, and can easily overrun when left to defaults. Definition and Usage. 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_end_clean () as the buffer contents are discarded when ob_end_clean () is called. ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering. yes you need to take Response::make out of image2 function and put ob_end_clean() after imagejpeg. 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 (). 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_get_clean() function returns the contents of the output buffer and then deletes the contents from the buffer. We then investigated ob_start to capture the output buffer. This is a bit harsh. 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). Oct 16, 2014 at 16:02. g. function test_shortcodes () { return 'Shortcodes are working!'; } add_shortcode ('test_shortcodes', 'test_shortcodes'); I have. 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. ob_get_length — Return the length of the output buffer. ob_get_length() gets the size of the buffer, in bytes. Description ¶. We next include the template file. Viewed 2k times. If i remove line with ob_get_clean () ab_id_transakce have correct variable from form input. Your shortcode callback is going to output content rather than return it which is why you're seeing it appear at the top of your page. 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(). Capturing PNG stream with PHP output buffer. Example #1. 3. Descripción ¶. This way when you won’t go inside that “if”, you are closing the output buffer which wasn’t started by you. The problem with this is, that you have “ob_get_clean” outside the “if”, where “ob_start” is. ob_flush() - Vaciar (enviar) el búfer de salida ob_end_flush() - Volcar (enviar) el búfer de salida y deshabilitar el almacenamiento en el mismo ob_end_clean() - Limpiar (eliminar) el búfer de salida y deshabilitar el almacenamiento en el mismo ＋add a note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 フラグを指定する必要があります。I know that this is an old question but I wanted to write my answer for visual learners. La función ob_get_clean() es la combinación de ob_get_contents() y ob_end_clean(). WordPress uses get_ for returning almost any function inside the loop without echoing out to the browser. Provide details and share your research! But avoid. In versions of dompdf prior to 0. Enabling output buffering decreases the download time it takes and renders the HTML in the browser. After this is done you are not able to modify header. In such case the creation of the file can fail. ob_get_flush() — This functions creates combinatorial effects of both ob_get_contents() and ob_end_flush(). This one uses ob_get_clean() and does not produce the correct result:Wordpress: ob_get_clean(); doesn't return $value in shortcode?Helpful? Please support me on Patreon: thanks & prai. Just add below code to your theme’s functions. Definition and Usage. ob_get_clean(): Three Birds, One Stone. Unfortunately, there is no way to do an implicit ob_flush() after each output, that I am aware of. 4 ob_* functions. First follow what the codex says Shortcodes. I installed it without composer, do all by instructions. It can be distinguish using binary operator &:If you use ob_get_clean(), you delete output buffer after first call. So, the functions ob_start(); ob_get_contents(); and ob_end_clean(); don't work. As soon as you call this function all output will be stored in an internal buffer and nothing will be sent to the browser until the script. Asking for help, clarification, or responding to other answers. 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. mPDF is a PHP library which generates PDF files from UTF-8 encoded HTML. Here's my function:The ob_get_contents () function has different return behaivor in PHP 5. Teams. ob_clean (): bool. 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. ob_end_clean (): bool. 6. Example shortcodes:I found ob_start() and ob_get_clean() in php manual to achieve this. Take a look at very simple example for PHP 5. 1 the document fed to dompdf would be pre-processed using PHP's eval() function when DOMPDF_ENABLE_PHP was set to true. I found this question on Stack Overflow, and it basically does what I want. ob_get_clean essentially executes both ob_get_contents and. . e. I'm using dompdf to try and convert html into a pdf file. 3. Here I’ve just added style: float=right. I am trying to create a modular plugin that includes action hooks for developers to add content before and after the main shortcode content. ) 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. 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. I don't see here why you would use them to pass data from PHP to js. 2 Answers. ob_get_flush() Returns the current buffer contents, output it immediately, then clean it out. 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。. ob_get_clean() essentially executes both ob_get_contents() and ob_end_clean(). 2. ob_clean () Deletes all of the content from the topmost output buffer. I have tried ob_flush(); and flush() but that doesn't help either. Answer to your both the question lies in output buffer(ob), Hope this will help you out in understanding. // Some browsers will not display the content if it is too short. –W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Syntax. Otherwise ob_clean () will not work. Improve this answer. . answered May 17, 2012 at 13:57. 2) $bild="images/newimage2. Both approaches therefore may become unreliable - in particular when switching between development setups and/or production servers. ob_get_clean — Get current buffer contents and delete current output buffer. ). 1 Answer. Output Control 함수 목록. We hope this article has been informative and useful in understanding the ob_start () function in PHP. x and PHP 5. We next include the template file. The ob_start () function is a useful tool for buffering your output in your PHP web application. Flushes the system write buffers of PHP and whatever backend PHP is using (CGI, a web server, etc). First, you can't call a PHP page like that using include_once - the query string will be ignored. ob_get_clean, only works twice. Use of ob_start() and ob_get_clean() 0. Please I need an explanation on. But of course, these are only a few of the common basics of output buffering. So the browser doesn't receive header correctly. Follow edited Nov 19, 2013 at 18:14. ob_get_contents does not clear the buffer so when a script ends it is flushed to the output as usual. Best you can do is:. output_compression to 0 or Off; 3) setting Apache variables such as "no-gzip" either through apache_setenv () or through entries in . 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. 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. Share. Using ob_gzhandler and manually echo'ing the buffer. An optional output_callback function may be specified. This is not always the same as the number of characters because some characters may have more than one byte. PHP ob_end_clean does not clear buffer. 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?. For example: use function OutputControlob_start; use function OutputControlob_end_flush; use function OutputControlob_get_clean; ob_start ();. 3. คำอธิบายที่ดี ฉันจะไปอีกขั้นหนึ่งแล้วแทนที่ob_get_contents()ด้วยob_get_clean()และลบob_end_clean()เนื่องจากจะob_get_clean()ทำหน้าที่ทั้งสองอย่างเป็นหลัก การ. So the first thing in your script should be ob_start (). For example: buffer is empty; echo 'hello' - output buffer has "hello" stringIn this article, we will take an in-depth look at the ob_get_length() function and its usage. The ob_start () function creates an output buffer. And by that you can put the variable content into your json data. 22. 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. Is there any other way to read file into a variable and parse all the PHP in there. 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. Here are references for the two functions required for basic output buffering: PHP ob_start() PHP ob_get_clean() ★ Pro Tip: ‹ PHP Get Memory Usage vs. Take a look at very simple example for PHP 5. Capture php output of function call. 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. ob_get_clean does two things: it gets the contents of the buffer as a string, and it cleans out the buffer. I am including HTML template in my shortcode by using ob_start & ob_get_clean. When output buffer is ended it is sent to the client (browser). ob_gzhandler() - Được sử dụng như một hàm gọi lại cho ob_start() để nén nội dung của bộ đệm khi gửi nó đến trình duyệt. The ob_get_level () function indicates how many output buffers are currently on the stack. These are the top rated real world PHP examples of ob_GET_clean extracted from open source projects. Description ¶. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. What is the benefit of passing a callback to ob_start compared to just processing the result of ob_get_clean()? 0. In this case, since the 2 statements follow each other, you're not intercepting anything at all. When placing a shortcode on a custom WordPress page the output is always displayed at the top of my page content. In order to accomplish that, I created a class that, among other things, creates an image. Output can come from any of the following sources:. 1. 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. ob_flush. Add a comment | 0 The Problem is, you are replcing tho variables from one source. To close all layers an prevent problems, do the following: while (@ob_end_clean ()) { // do nothing } This will delete all layers. htaccess. But before returning the code to the caller, do the necessary text substitution. I have used ob_start and ob_get_clean function to clear the buffer and it starts working. ob_clean() - Xóa tất cả nội dung của bộ đệm đầu ra trên cùng. 0. PHP provides a set of functions that control what content is sent to the browser and when. The output buffer must be started by ob_start with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. 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. ob_clean (): bool. I need to use ob_get_contents() because I am going to implement a simple caching mechanism that saves the the output to a file. kub. Note: This function is similar to ob_end_flush (), except that this function also returns the. 4. Viewed 2k times. joson_encode however does just fine, when wp_debug is disabled. It works only if the output buffer is started by ob_start () with PHP_OUTPUT_HANDLER_CLEANABLE and PHP_OUTPUT_HANDLER_REMOVABLE flags. Thanks for contributing an answer to Stack Overflow! Please be sure to answer. return <<<EOT <html> EOT; But I want to split the file into different php files t. Thank you very much for your help. ob_get_level () will return the current nesting level of the output buffer. php file and you should start seeing Login / Login on your main header. Milo Milo. Definition and Usage. 5 Answers. Which means that the contents returned are not the result returned by the callback, but the input passed to the callback. ob_get_clean() essentially executes both ob_get_contents() and ob_end_clean(). it will work as you would use ob_start with no. Gets the current buffer contents and delete current output buffer. After creating a custom shortcode and inserting it into any page position, it also shows up at the top of the page, but only in Edit mode. ob_end_clean() don't work as intended. Something like this:. ob_start () use. This function discards the contents of the output buffer. The browser should then only get gz-encoded data as it was the output buffer at the topmost level. 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. ob_end_clean() don't work as intended. – Raj. The output buffer must be started by ob_start() with PHP_OUTPUT_HANDLER_CLEANABLE flag. Other functions are all working fine e. another plugin which started the first ob_start() calls ob_get_clean() you'll get unexpected results. Specifically, would it benefit from patching a different value into the output_buffer_size (not the correct value name) in CodeIgniter (instead of 4K of data by default) -- and would it function if ob_get_length() was a larger value than 0 -- would that last bit of data never get sent (and die in an output_buffer)?Definition and Usage. The ob_flush () function outputs the contents of the topmost output buffer and then clears the buffer of the contents. In this case, since the 2 statements follow each other, you're not intercepting anything at all. Esto se utiliza comúnmente para que las páginas puedan enviar cabeceras "después" de haber "enviado" algún contenido (es decir. So why in manual these functions are under control PHP_OUTPUT_HANDLER_CLEANABLE const? I'm confused about using flags in. ob_get_clean() return the buffer and empty it. 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. Learn more about CollectivesCollectives™ on Stack Overflow. Collectives™ on Stack Overflow. David Barker David Barker. ini involving setting output_buffer and/or zlib. PHP_OUTPUT_HANDLER_CLEAN when calling ob_clean(), ob_end_clean() and ob_get_clean() PHP_OUTPUT_HANDLER_WRITE automaticflush; Phases start, final and flush (resp. yeah the php script was adding some whitespaces at the beginning and images files became corrupted on downloading, ob_get_clean() fixed it. txt which is the last line of that file. Manual says: "The function will be called when ob_end_flush () is called, or when the output buffer is flushed to the browser at the end of the request. 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. 7. ob_srtart begins output buffering. 1. There are a number of functions related to output buffering, but the two we’ll use are ob_start and ob_get_clean. Syntax. As a result, the first ob_start () will have an ob_get_level () of 2, the second will be 3, and so on. 0, PHP 5, PHP 7) ob_clean — Clean (erase) the output buffer Description ob_clean ( ) : void This function discards the contents of the output buffer. The ob_start () function starts PHP’s output buffering. Everything works normally but the returned HTML structure is broken. g in your shortcode handler. Có nhiều lợi ích khi sử dụng ob_start trong PHP, bao gồm: Giảm tải server: ob_start có thể giúp giảm tải server bằng cách lưu trữ toàn bộ dữ liệu đầu ra trong bộ đệm (buffer) trước khi gửi nó đến trình duyệt. Before you downvote, the reason I added this as an answer and not a comment is I don't have sufficient reputation to comment. . 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. In PHP 8. mikerojas mikerojas. Definition and Usage. Find centralized, trusted content and collaborate around the technologies you use most. ob_get_contents — Return the contents of the output buffer. Q&A for work. It should really only give you the 1st one. When I opened the file in notepad, I could see it was just the raw html. How to pass a callback function with parameters for ob_start in PHP? 4. 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. Hi, we were using html_output() to get all the tags generated by the SEO Framework 4. ob_flush does not work on my server. Basically you need to ob_start() before first html tag or php code printing the data - if that div stage1sat should belong to message, then you need to move ob_start before it. 在 ob_start () 之後的程式碼中的輸出語句都會進入輸出緩衝區. 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. ), 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. 1. 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_get_clean ( ): string|false. 2. 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. Lo tienes al revés. – Cain Nuke Jun 25, 2019 at 23:37Off the top of my head, ob_flush() basically outputs the current buffer to PHP's internal buffer, then cleans the ob buffer. this is how I am inlcuding the html template in my shortcode function. ob_get_contents — Return the contents of the output buffer. Connect and share knowledge within a single location that is structured and easy to search. If this function returns more than 0 you are still inside a buffer. Conclusion. Learn more about CollectivesI have an issue with a shortcode that I'm writing for wordpress. That's related to how the. I'm using PHP 5. – 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(. There are couple of other ob_ functions for more flexibility. log (ab_id_transakce); return empty variable because there is in php ob_get_clean (). 참고 See also header() and setcookie() . Tiện ích lọc. ob_get_clean — Get current buffer contents and delete current output buffer. Support » Developing with WordPress » ob_end_flush(): failed to send buffer of zlib output compression in ext php file ob_end_flush(): failed to send buffer of zlib output compression i…Neither discarding the buffer's contents (ob_clean() ob_end_clean(), ob_get_clean()) nor retrieving the current buffer contents (ob_get_contents(), ob_get_clean()) invoke the output callback. My main template file which would have the page layout (header, body, sidebar, footer) is included into the page. We hope this article has been informative and useful in understanding the ob_clean () function in PHP. For text-logfile/debugging needs, I want all , , multiple spaces and so on to be cleared. ob_end_clean (): bool. 0, but it seems that the function is deprecated in 4. ob_get_clean essentially executes both ob_get_contents and ob_end_clean. Improve this answer. ob_get_clean () remove value of input. . Using ob_get_clean(), there is even a double notice: "ob_get_clean(): failed to delete buffer of default output handler (1)". it stops junk being returned. comes in handy for conditional statements. The code is sorta lik.