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1925 <a href=
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1932 <a href=
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1950 <a href=
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1951 <svg xmlns=
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"0 0 24 24"><path d=
"M20.71 7.04c.39-.39.39-1.04 0-1.41l-2.34-2.34c-.37-.39-1.02-.39-1.41 0l-1.84 1.83 3.75 3.75M3 17.25V21h3.75L17.81 9.93l-3.75-3.75L3 17.25z"/></svg>
1955 <h1 id=
"exceptions">Exceptions
<a class=
"headerlink" href=
"#exceptions" title=
"Permanent link">#
</a></h1>
1956 <h2 id=
"spl-exceptions">SPL Exceptions
<a class=
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"#spl-exceptions" title=
"Permanent link">#
</a></h2>
1957 <p>The
<a href=
"https://secure.php.net/manual/en/book.spl.php">Standard PHP Library (SPL)
</a> provides some
<a href=
"https://secure.php.net/manual/en/spl.exceptions.php">exceptions
</a> that should be used whenever possible.
</p>
1958 <h2 id=
"custom-exceptions">Custom Exceptions
<a class=
"headerlink" href=
"#custom-exceptions" title=
"Permanent link">#
</a></h2>
1959 <div class=
"admonition warning">
1960 <p class=
"admonition-title">Do not use
<code>wcf\system\exception\SystemException
</code> anymore, use specific exception classes!
</p>
1962 <p>The following table contains a list of custom exceptions that are commonly used.
1963 All of the exceptions are found in the
<code>wcf\system\exception
</code> namespace.
</p>
1968 <th>(examples) when to use
</th>
1973 <td><code>IllegalLinkException
</code></td>
1974 <td>access to a page that belongs to a non-existing object, executing actions on specific non-existing objects (is shown as http
404 error to the user)
</td>
1977 <td><code>ImplementationException
</code></td>
1978 <td>a class does not implement an expected interface
</td>
1981 <td><code>InvalidObjectArgument
</code></td>
1982 <td><span class=
"label label-info">5.4+
</span> API method support generic objects but specific implementation requires objects of specific (sub)class and different object is given
</td>
1985 <td><code>InvalidObjectTypeException
</code></td>
1986 <td>object type is not of an expected object type definition
</td>
1989 <td><code>InvalidSecurityTokenException
</code></td>
1990 <td>given security token does not match the security token of the active user's session
</td>
1993 <td><code>ParentClassException
</code></td>
1994 <td>a class does not extend an expected (parent) class
</td>
1997 <td><code>PermissionDeniedException
</code></td>
1998 <td>page access without permission, action execution without permission (is shown as http
403 error to the user)
</td>
2001 <td><code>UserInputException
</code></td>
2002 <td>user input does not pass validation
</td>
2011 <div class=
"md-source-date">
2014 Last update:
2021-
01-
12
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