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<HTML
><HEAD
><TITLE
>Reporting Errors</TITLE
><META
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CONTENT="Modular DocBook HTML Stylesheet Version 1.57"><LINK
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><BODY
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LINK="#0000FF"
VLINK="#840084"
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><DIV
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><TABLE
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BORDER="0"
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><TR
><TH
COLSPAN="3"
ALIGN="center"
>PHP Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="calling-user-functions.html"
>Prev</A
></TD
><TD
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ALIGN="center"
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>Appendix B. PHP development</TD
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>Next</A
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><HR
ALIGN="LEFT"
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><DIV
CLASS="sect1"
><H1
CLASS="sect1"
><A
NAME="phpdevel-errors"
>Reporting Errors</A
></H1
><P
>&#13;   To report errors from an internal function, you should call the
   <B
CLASS="function"
>php3_error()</B
> 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
   <A
HREF="function.printf.html"
><B
CLASS="function"
>printf()</B
></A
> call), and any following arguments
   are the parameters for the format string. The error levels are:
  </P
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-notice"
>E_NOTICE</A
></H2
><P
>&#13;    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 <A
HREF="function.stat.html"
><B
CLASS="function"
>stat()</B
></A
> on a file that doesn't exist.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-warning"
>E_WARNING</A
></H2
><P
>&#13;    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 
	<A
HREF="function.ereg.html"
><B
CLASS="function"
>ereg()</B
></A
> with an invalid regular expression.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-error"
>E_ERROR</A
></H2
><P
>&#13;    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.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-parse"
>E_PARSE</A
></H2
><P
>&#13;    Parse errors should only be generated by the parser. The code is
    listed here only for the sake of completeness.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-core-error"
>E_CORE_ERROR</A
></H2
><P
>&#13;    This is like an E_ERROR, except it is generated by the core
    of PHP. Functions should not generate this type of error.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-core-warning"
>E_CORE_WARNING</A
></H2
><P
>&#13;    This is like an E_WARNING, except it is generated by the core
    of PHP. Functions should not generate this type of error.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-compile-error"
>E_COMPILE_ERROR</A
></H2
><P
>&#13;     This is like an E_ERROR, except it is generated by the Zend Scripting
     Engine. Functions should not generate this type of error.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-compile-warning"
>E_COMPILE_WARNING</A
></H2
><P
>&#13;     This is like an E_WARNING, except it is generated by the Zend Scripting
     Engine. Functions should not generate this type of error.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-user-error"
>E_USER_ERROR</A
></H2
><P
>&#13;     This is like an E_ERROR, except it is generated in PHP code by using
     the PHP function <A
HREF="function.trigger-error.html"
><B
CLASS="function"
>trigger_error()</B
></A
>. Functions should 
     not generate this type of error.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-user-warning"
>E_USER_WARNING</A
></H2
><P
>&#13;     This is like an E_WARNING, except it is generated  by using the PHP 
     function <A
HREF="function.trigger-error.html"
><B
CLASS="function"
>trigger_error()</B
></A
>. Functions should not 
     generate this type of error.
   </P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="internal.e-user-notice"
>E_USER_NOTICE</A
></H2
><P
>&#13;     This is like an E_NOTICE, except it is generated by using the PHP
     function <A
HREF="function.trigger-error.html"
><B
CLASS="function"
>trigger_error()</B
></A
>. Functions should not 
     generate this type of error.
   </P
></DIV
></DIV
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