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$php_errmsg is not global

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links to expressions, predefined $php_errmsg


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@98944 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Friedhelm Betz 2002-10-09 08:30:45 +00:00
parent 48a60f2a86
commit 13103e40f0
1 changed files with 10 additions and 8 deletions
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18
language/operators.xml
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@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.39 $ -->
<!-- $Revision: 1.40 $ -->
<chapter id="language.operators">
<title>Operators</title>
<simpara>
@ -406,14 +406,15 @@ $b .= "There!"; // sets $b to "Hello There!", just like $b = $b . "There!";
<simpara>
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.
be generated by that expression will be ignored.
</simpara>
<simpara>
If the <link linkend="ini.track-errors">track_errors</link>
feature is enabled, any error message generated by the expression
will be saved in the global variable $php_errormsg. This variable
will be overwritten on each error, so check early if you want to
use it.
will be saved in the variable
<link linkend="reserved.variables.phperrormsg">$php_errormsg</link>.
This variable will be overwritten on each error, so check early if you
want to use it.
</simpara>
<para>
<informalexample>
@ -435,9 +436,10 @@ $value = @$cache[$key];
</para>
<note>
<simpara>
The @-operator works only on expressions. A simple rule of thumb
is: if you can take the value of something, you can prepend the @
operator to it. For instance, you can prepend it to variables,
The @-operator works only on
<link linkend="language.expressions">expressions</link>. A simple rule
of thumb is: if you can take the value of something, you can prepend
the @ operator to it. For instance, you can prepend it to variables,
function and <function>include</function> calls, constants, and
so forth. You cannot prepend it to function or class definitions,
or conditional structures such as <literal>if</literal> and