K-Gun 8, 2 2 gold badges 40 40 silver badges 50 50 bronze badges. Return Values No value is returned. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Feedback post: Moderator review and reinstatement processes. See a full list here. It does not erase the buffer. If you're doing it as a "security measure" you're probably doing it wrong. After it receives this it immediately displays it and then displays anything else as it is received. Some versions of Microsoft Internet Explorer will only start to display the page after they have received bytes of output, so you may need to send extra whitespace before flushing to get those browsers to display the page.
This function discards the contents of the output buffer. This function does not destroy the output buffer like ob_end_clean() does. The output buffer must be.
PHP ob_end_flush Manual
It also doesn't affect PHP's userspace output buffering mechanism. This means you will have to call both ob_flush() and flush() to flush the ob output buffers if. This function will send the contents of the output buffer (if any). If you want to further This function does not destroy the output buffer like ob_end_flush() does.
Note that running into this error in the above scenario could indicate some bad practice in terms of how your application is structured, conflicts with other plugins, or something else that is otherwise no bueno.
You might want to prevent your script from executing if the client already has the latest version. But someday, you may need to understand it!
output How to clear previously echoed items in PHP Stack Overflow
This issue took me days a while ago to debug. Sampson Sampson k 64 64 gold badges silver badges bronze badges. Edit Report a Bug. AJAX requests are an entirely different beast compared with simple outputting to a browser window.
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|In my testing, Internet Explorer 6.
Sign up or log in Sign up using Google. You can for instance use this technique to generate images dynamically. Much appreciated.
You might want to prevent your script from executing if the client already has the latest version. In both cases, doing what you are asking for adds 0 security.
PHP ob_get_flush Manual
ob_end_clean — Clean (erase) the output buffer and turn off output buffering. echo 'Caching for ', $mins*60, 'secs ', date('G:i:s');?>. ob_get_flush. (PHP 4 >=PHP 5, PHP 7).
PHP flush Manual
ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering. flush — Flush system output buffer; ob_clean — Clean (erase) the output buffer ob_end_flush — Flush (send) the output buffer and turn off output buffering.
Even the browser may buffer its input before displaying it.
Linked If the user indicates he already has a version of the image by the If-Modified-Since-Header, there's no need to generate it and let the server finally discard it because the server only then interpretes the If-Modified-Since-Header. Do you see any potential security issues with that? If you are doing this because you are letting your users upload PHP scripts, let me tell you that this is an extremely bad idea. This function will send the contents of the output buffer if any.
What is output buffering?
Video: Clear output buffer php date ob end flush failed to send buffer of zlib output compression