Hi,
this is just to add a behavior that I haven't understud at first place.
ob_get_flush actually returns the content of the buffer as a text but also it sends the buffer back to the browser so that it's displayed on user screen.
Use ob_get_clean if you do not want the buffer to be send to the user
ob_get_flush
(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
Beschreibung
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.
Parameter-Liste
Diese Funktion besitzt keine Parameter.
Rückgabewerte
Returns the contents of the active output buffer on success
or false on failure.
Fehler/Exceptions
If the function fails it generates an E_NOTICE.
Beispiele
Beispiel #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());
?>Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
Array
(
[0] => default output handler
)
Array
(
)
Siehe auch
- ob_start() - Ausgabepufferung aktivieren
- ob_get_contents() - Liefert den Inhalt des Ausgabepuffers
- ob_flush() - Leert (sendet) den Rückgabewert des aktiven Ausgabe-Handlers
- ob_end_flush() - Leert (sendet) den Rückgabewert des aktiven Ausgabe-Handlers und deaktiviert den aktiven Ausgabepuffer
- ob_get_clean() - Get the contents of the active output buffer and turn it off
add a note
User Contributed Notes 4 notes
info at pcdoctor dot fr ¶
16 years ago
taras dot dot dot di at gmail dot com ¶
16 years ago
I don't know how exactly this works, but if you call this function, PHP would behave as if headers have been sent (even though the output has gone to a string).
This means that you can't call this function, and then call setcookie for example.
This was verified by trial and error
zubin@byron ¶
19 years ago
I found this function is useful for storing output instead of displaying it. For example, I wanted to use an old function which echoed the ouput but I wanted it in a variable, not outputted immediately. Here's how:
<?php
// start generating html
$html = '<html><head>'; // etc
// start output buffering
ob_start();
// call function which outputs immediately
print_menu();
// append this to $html
$html .= ob_get_flush();
// empty output buffer
ob_clean();
?>
zubin@byron ¶
19 years ago
Correction to previous post: ob_get_clean() is better, ie:
<?php
// start generating html
$html = '<html><head>'; // etc
// start output buffering
ob_start();
// call function which outputs immediately
print_menu();
// append this to $html and empty buffer
$html .= ob_get_clean();
?>
