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<HTML
><HEAD
><TITLE
>Error Control Operators</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.57"><LINK
REL="HOME"
TITLE="PHP Manual"
HREF="manual.html"><LINK
REL="UP"
TITLE="Operators"
HREF="language.operators.html"><LINK
REL="PREVIOUS"
TITLE="Comparison Operators"
HREF="language.operators.comparison.html"><LINK
REL="NEXT"
TITLE="Execution Operators"
HREF="language.operators.execution.html"><META
NAME="HTTP_EQUIV"
CONTENT="text/html; charset=ISO-8859-1"></HEAD
><BODY
CLASS="sect1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>PHP Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="language.operators.comparison.html"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 10. Operators</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="language.operators.execution.html"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="sect1"
><H1
CLASS="sect1"
><A
NAME="language.operators.errorcontrol"
>Error Control Operators</A
></H1
><P
> PHP supports one error control operator: the at sign (@). When
prepended to an expression in PHP, any error messages that might
be generated by that expression will be ignored.
</P
><P
> If the <A
HREF="configuration.html#ini.track-errors"
>track_errors</A
>
feature is enabled, any error message generated by the expression
will be saved in the global variable $php_errormsg. This variable
will be overwritten on each error, so check early if you want to
use it.
</P
><P
> <DIV
CLASS="informalexample"
><A
NAME="AEN3120"
></A
><P
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="programlisting"
> <?php
/* Intentional SQL error (extra quote): */
$res = @mysql_query ("select name, code from 'namelist") or
die ("Query failed: error was '$php_errormsg'");
?>
</PRE
></TD
></TR
></TABLE
><P
></P
></DIV
>
</P
><P
> See also <A
HREF="function.error-reporting.html"
><B
CLASS="function"
>error_reporting()</B
></A
>.
</P
><DIV
CLASS="warning"
><P
></P
><TABLE
CLASS="warning"
BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>Warning</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
> Currently the "@" error-control operator prefix will even disable
error reporting for critical errors that will terminate script
execution. Among other things, this means that if you use "@" to
suppress errors from a certain function and either it isn't
available or has been mistyped, the script will die right there
with no indication as to why.
</P
></TD
></TR
></TABLE
></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="language.operators.comparison.html"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="manual.html"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="language.operators.execution.html"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Comparison Operators</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="language.operators.html"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Execution Operators</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
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