note 22797 deleted from function.ob-start by sander
| From: | sander@php.net | Date: | Sun, 30 Jun 2002 16:56:33 +0000 |
| Subject: | note 22797 deleted from function.ob-start by sander | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-32440@lists.php.net to get a copy of this message | ||
Remember that you *cannot* output anything directly from within the output_callback function.
This code, for example:
<?php
function callback() {
echo "Output buffering is over, but this also won't be displayed.";
}
ob_start('callback');
echo 'This will never be displayed.';
ob_end_clean();
?>
Will show no output whatsoever, as output buffering is still in place when the callback function is
called. Using ob_end_flush instead of ob_end_clean doesn't appear to help.
Everything you want to output from the function must be returned, not printed, like so:
<?php
function callback() {
return 'Output buffering is over, and this will actually be displayed.';
}
ob_start('callback');
echo 'This will never be displayed.';
ob_end_clean();
?>
My tests have also shown that you don't *have* to take the current output buffer as a parameter
in the callback function.