(PHP 4 >= 4.3.0, PHP 5)
ob_get_flush — Flush the output buffer, return it as a string and turn off output buffering
ob_get_flush() flushes the output buffer, return it as a string and turns off output buffering.
Note: This function is similar to ob_end_flush(), except that this function returns the buffer as a string.
Returns the output buffer or FALSE if no buffering is active.
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());
?>
上例将输出：
Array ( [0] => default output handler ) Array ( )