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Discourage using foreacha along with array pointers, "wont fix" side effects

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@245989 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Etienne Kneuss 2007-11-10 16:57:24 +00:00
parent 9ed79ffe2a
commit d1ef2aa672
1 changed files with 4 additions and 10 deletions
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14
language/control-structures.xml
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@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.150 $ -->
<!-- $Revision: 1.151 $ -->
<chapter xml:id="language.control-structures" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<title>Control Structures</title>
@ -540,15 +540,9 @@ foreach (array_expression as $key => $value)
<para>
Unless the array is <link linkend="language.references">referenced</link>,
<literal>foreach</literal> operates on a copy of
the specified array and not the array itself. Therefore, the
array pointer is not modified as with the
<function>each</function> construct, and changes to the array
element returned are not reflected in the original array.
However, the internal pointer of the original array
<emphasis>is</emphasis> advanced with the processing of the
array. Assuming the foreach loop runs to completion, the
array's internal pointer will be at the end of the array.
</para>
the specified array and not the array itself.<literal>foreach</literal> has
some side effets on the array pointer. Don't rely on the array pointer during
or after the foreach without resetting it.</para>
</note>
</para>
<para>