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><A
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>Chapter 14. Error handling</A
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><P
> There are 4 types of errors and warnings in PHP. They are:
<P
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><UL
><LI
><P
>1 - Normal Function Errors</P
></LI
><LI
><P
>2 - Normal Warnings</P
></LI
><LI
><P
>4 - Parser Errors</P
></LI
><LI
><P
>8 - Notices (warnings you can ignore but which
may imply a bug in your code)</P
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> The above 4 numbers are added up to define an error reporting
level. The default error reporting level is 7 which is 1 + 2 + 4,
or everything except notices. This level can be changed in the
php3.ini file with the error_reporting directive. It can also be
set in your Apache httpd.conf file with the php3_error_reporting
directive or lastly it may be set at runtime within a script using
the <A
HREF="function.error-reporting.html"
><B
CLASS="function"
>error_reporting()</B
></A
> function.</P
><P
>
All <A
HREF="language.expressions.html"
>PHP expressions</A
> can also be called
with the "@" prefix, which turns off error reporting for that particular
expression. If an error occurred during such an expression and the
<A
HREF="configuration.html#ini.track-errors"
>track_errors</A
> feature
is enabled, you can find the error message in the global variable
$php_errormsg.</P
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