Reporting Errors
To report errors from an internal function, you should call the
php3_error() function. This takes at least two
parameters -- the first is the level of the error, the second is
the format string for the error message (as in a standard
printf() call), and any following arguments
are the parameters for the format string. The error levels are:
E_NOTICE
Notices are not printed by default, and indicate that the script
encountered something that could indicate an error, but could also
happen in the normal course of running a script. For example,
trying to access the value of a variable which has not been set,
or calling stat() on a file that doesn't exist.
E_WARNING
Warnings are printed by default, but do not interrupt script
execution. These indicate a problem that should have been trapped
by the script before the call was made. For example, calling
ereg() with an invalid regular expression.
E_ERROR
Errors are also printed by default, and execution of the script is
halted after the function returns. These indicate errors that can
not be recovered from, such as a memory allocation problem.
E_PARSE
Parse errors should only be generated by the parser. The code is
listed here only for the sake of completeness.
E_CORE_ERROR
This is like an E_ERROR, except it is generated by the core
of PHP. Functions should not generate this type of error.
E_CORE_WARNING
This is like an E_WARNING, except it is generated by the core
of PHP. Functions should not generate this type of error.
E_COMPILE_ERROR
This is like an E_ERROR, except it is generated by the Zend Scripting
Engine. Functions should not generate this type of error.
E_COMPILE_WARNING
This is like an E_WARNING, except it is generated by the Zend Scripting
Engine. Functions should not generate this type of error.
E_USER_ERROR
This is like an E_ERROR, except it is generated in PHP code by using
the PHP function trigger_error(). Functions should
not generate this type of error.
E_USER_WARNING
This is like an E_WARNING, except it is generated by using the PHP
function trigger_error(). Functions should not
generate this type of error.
E_USER_NOTICE
This is like an E_NOTICE, except it is generated by using the PHP
function trigger_error(). Functions should not
generate this type of error.
E_ALL
All of the above. Using this error_reporting level will show
all error types.
