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Autoload and exceptions work. Mostly. Fix#50250

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@291300 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Richard Quadling 2009-11-25 11:00:11 +00:00
parent 4ce57561b7
commit 0d2968f8e0
1 changed files with 67 additions and 3 deletions
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70
language/oop5/autoload.xml
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@ -17,9 +17,13 @@
</para>
<note>
<para>
Exceptions thrown in __autoload function cannot be caught in the
<link linkend="language.exceptions">catch</link> block and results in
a fatal error.
Prior to 5.3.0, exceptions thrown in the __autoload function could not be
caught in the <link linkend="language.exceptions">catch</link> block and
would result in a fatal error. From 5.3.0+ exceptions thrown in the
__autoload function can be caught in the <link linkend="language.exceptions">
catch</link> block, with 1 proviso. If throwing a custom exception, then
the custom exception class must be available. The __autoload function may
be used recursively to autoload the custom exception class.
</para>
</note>
<note>
@ -82,6 +86,66 @@ Fatal error: Interface 'ITest' not found in ...
]]>
</programlisting>
</example>
<example>
<title>Autoloading with exception handling for 5.3.0+</title>
<para>
This example throws an exception and demonstrates the try/catch block.
</para>
<programlisting role="php">
<![CDATA[
<?php
function __autoload($name) {
echo "Want to load $name.\n";
throw new Exception("Unable to load $name.");
}
try {
$obj = new NonLoadableClass();
} catch (Exception $e) {
echo $e->getMessage(), "\n";
}
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Want to load NonLoadableClass.
Unable to load NonLoadableClass.
]]>
</screen>
</example>
<example>
<title>Autoloading with exception handling for 5.3.0+ - Missing custom exception</title>
<para>
This example throws an exception for a non-loadable, custom exception.
</para>
<programlisting role="php">
<![CDATA[
<?php
function __autoload($name) {
echo "Want to load $name.\n";
throw new MissingException("Unable to load $name.");
}
try {
$obj = new NonLoadableClass();
} catch (Exception $e) {
echo $e->getMessage(), "\n";
}
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Want to load NonLoadableClass.
Want to load MissingException.
Fatal error: Class 'MissingException' not found in testMissingException.php on line 4
]]>
</screen>
</example>
</para>
<simplesect role="seealso">