Re: output buffering callback limitation

maybe php.general would be more appropriate im not a developer, but i think this "feature" doesnt make sense hehe i think ob display handlers are not supposed to output things directly, they just return them to the function that will output it at your first snip, you could/should do: <?php function ob_perso_handler($buffer) { $buffer = 'foo'. $buffer; //you already received output data return $buffer; } ob_start('ob_perso_handler'); echo 'Hello World !'; ?> at the second: <?php function ob_perso_handler1($buffer) { return $buffer .'f1'; } function ob_perso_handler2($buffer) { return 'foo'. $buffer .'f2'; } ob_start('ob_perso_handler1'); ob_start('ob_perso_handler2'); echo 'Hello World !'; ?> good luck on the killer appz Okin okin wrote:

Hi, I'm having trouble with output buffering limitation and the output_callback function of ob_start. look at this script : <?php function ob_perso_handler($buffer) { ob_start(); echo 'foo'; $buffer .= ob_get_contents(); ob_end_clean(); return $buffer; } ob_start('ob_perso_handler'); echo 'Hello World !'; ?> it outputs : "Fatal error: ob_start(): Cannot use output buffering in output buffering display handlers" Why then ? It would be a killer feature for my next killer appz ! I've tried also : <?php function ob_perso_handler1($buffer) { return $buffer . 'f1'; } function ob_perso_handler2($buffer) { ?> foo <? return $buffer . 'f2'; } ob_start('ob_perso_handler1'); ob_start('ob_perso_handler2'); echo 'Hello World !'; ?> but were does "foo" go ? any idea on that ? maybe some source change to PHP to permit one or the other solution ? I'm new to this mailing list, please redirect me to the correct one if I'm wrong here. My thought was it was a developper problem, since change to the source has to be done to enable such this feature ... Many thank's for any help ! Nikos Yahoo! Mail : votre e-mail personnel et gratuit qui vous suit partout ! Créez votre Yahoo! Mail sur http://fr.benefits.yahoo.com/ Dialoguez en direct avec vos amis grâce à Yahoo! Messenger !Téléchargez Yahoo! Messenger sur http://fr.messenger.yahoo.com