(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
ob_get_flush — Flush (send) the return value of the active output handler, return the contents of the active output buffer and turn it off
ob_get_flush(): string|false
This function calls the output handler (with the PHP_OUTPUT_HANDLER_FINAL flag), flushes (sends) it's return value, returns the contents of the active output buffer and turns off the active output buffer.
ob_get_flush() will fail without an active output buffer started with the PHP_OUTPUT_HANDLER_REMOVABLE flag.
ob_get_flush() will flush (send) the return value of the output handler even if the active output buffer was started without the PHP_OUTPUT_HANDLER_FLUSHABLE flag.
This function has no parameters.
Returns the contents of the active output buffer on success or false on failure.
If the function fails it generates an E_NOTICE.
Example #1 ob_get_flush() example
<?php
//using output_buffering=On
print_r(ob_list_handlers());
//save buffer in a file
$buffer = ob_get_flush();
file_put_contents('buffer.txt', $buffer);
print_r(ob_list_handlers());
?> The above example will output:
Array
(
[0] => default output handler
)
Array
(
)
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https://www.php.net/manual/en/function.ob-get-flush.php