Often it's necessary to print messages to the output
stream from your module, just as print()
would be used within a script. PHP offers functions for most
generic tasks, such as printing warning messages, generating
output for phpinfo(), and so on. The following
sections provide more details. Examples of these functions
can be found on the CD-ROM.
zend_printf() works like the
standard printf(), except that it prints to
Zend's output stream.