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1. www.php.net › manual › enPHP: fflush - Manual

   www.php.net › manual › en

   Flushes the output to a file fflush (PHP 4 >= 4.0.1, PHP 5, PHP 7, PHP 8) fflush — Flushes the output to a file

2. www.w3schools.com › php › func_filesystem_fflushPHP fflush () Function - W3Schools

   www.w3schools.com › php › func_filesystem_fflush

   Definition and Usage The fflush () function writes all buffered output to an open file. Syntax fflush (file)

3. www.tutorialspoint.com › php › php_function_fflushPHP fflush Function - Online Tutorials Library

   www.tutorialspoint.com › php › php_function_fflush

   • Php Version
   • Example
   • Note
   • Summary

   The fflush()function was first introduced as part of core PHP 4.0.1 and work well with the PHP 5, PHP 7, PHP 8.

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   In this example we will try to flush any buffered output using the PHP Filesystem fflush()function in PHP.

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   It is commonly used when writing data to files or network ports to make sure that the data is written quickly rather being delayed in memory.

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   The fflush()is a PHP function for clearing the output buffer. It ensures that all data written to a file or network stream is quickly sent or stored. It takes a single parameter, which is a file pointer or resource identifying the connection to the file or stream to flush. After flushing, it returns true if successful and false otherwise. It is com...

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4. zetcode.com › php-filesystem › fflushPHP fflush - Flushing Output in PHP - ZetCode

   zetcode.com › php-filesystem › fflush

   Apr 3, 2025 · PHP fflush function tutorial shows how to flush output buffers in PHP. Learn fflush with practical examples.

5. stackoverflow.com › questions › 37119672Explanation of PHP's fflush () function - Stack Overflow

   stackoverflow.com › questions › 37119672

   May 9, 2016 · 5 fflush For efficiency purpose, core system library of PHP does not necessarily writes to a file immediately when we call functions like fwrite or fputcsv. It stores them in buffer and stores at the same time after a while.

6. www.geeksforgeeks.org › php › php-fflush-functionPHP fflush ( ) Function - GeeksforGeeks

   www.geeksforgeeks.org › php › php-fflush-function

   Jul 11, 2025 · The fflush () function in PHP is an inbuilt function which is used to write all the buffered output to an open file. The fflush () function forces a write of all buffered output to the resource pointed to by the file handle.

7. People also ask

   What does fflush do in PHP?

   • This function forces a write of all buffered output to the resource pointed to by the file handle. fflush PHP Documentaiton Note that fflush () does not guarantee that the data is physically written to the underlying media. If the system crashes immediately after a successful fflush (), then the data written may still be lost.

   Explanation of PHP's fflush () function - Stack Overflow

   stackoverflow.com/questions/37119672/explanation-of-phps-fflush-function

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   What does fflush do?

   • The fflush () function writes all buffered output to an open file. Required. Specifies the open file to write the buffered output to Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

   PHP fflush () Function - W3Schools

   www.w3schools.com/php/func_filesystem_fflush.asp

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   Does fsync & fflush exist in PHP 8.1?

   • To ensure data persistence you'd need fsync () but unfortunately -- PHP being PHP -- that function does not exist. @jlh PHP 8.1 will include fsync and fdatasync functions. fflush () provides the same necessity as flush (), the difference being that the output is sent to a file rather than a browser.

   Explanation of PHP's fflush () function - Stack Overflow

   stackoverflow.com/questions/37119672/explanation-of-phps-fflush-function

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   What happens if fflush() fails?

   • Note that fflush () does not guarantee that the data is physically written to the underlying media. If the system crashes immediately after a successful fflush (), then the data written may still be lost. To ensure data persistence you'd need fsync () but unfortunately -- PHP being PHP -- that function does not exist.

   Explanation of PHP's fflush () function - Stack Overflow

   stackoverflow.com/questions/37119672/explanation-of-phps-fflush-function

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8. www.w3schools.am › php › func_filesystem_fflushPHP fflush () Function - w3schools.am

   www.w3schools.am › php › func_filesystem_fflush

   Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML.