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Used the entity for &null;.
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@287788 c90b9560-bf6c-de11-be94-00142212c4b1
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@ -74,7 +74,7 @@ echo $arr[12]; // 1
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Attempting to access an array key which has not been defined is
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the same as accessing any other undefined variable:
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an <constant>E_NOTICE</constant>-level error message will be
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issued, and the result will be <literal>NULL</literal>.
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issued, and the result will be &null;.
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</para>
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</note>
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