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A revision of the mode docs, and made the 0 warning a caution instead.

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@135505 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Philip Olson 2003-07-20 16:59:16 +00:00
parent 868a04317f
commit bf504c0c96
1 changed files with 16 additions and 17 deletions
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33
reference/array/functions/count.xml
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@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.7 $ -->
<!-- $Revision: 1.8 $ -->
<!-- splitted from ./en/functions/array.xml, last change in rev 1.2 -->
<refentry id="function.count">
<refnamediv>
@ -13,12 +13,6 @@
<methodparam><type>mixed</type><parameter>var</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>mode</parameter></methodparam>
</methodsynopsis>
<note>
<simpara>
The optional parameter <parameter>mode</parameter> is available as of
PHP 4.2.0.
</simpara>
</note>
<para>
Returns the number of elements in <parameter>var</parameter>,
which is typically an <type>array</type> (since anything else will have
@ -29,22 +23,27 @@
be returned (exception: <literal>count(&null;)</literal> equals
<literal>0</literal>).
</para>
<note>
<simpara>
The optional <parameter>mode</parameter> parameter is available as of
PHP 4.2.0.
</simpara>
</note>
<para>
The optinal parameter <parameter>mode</parameter> can be supplied to count
recursive. To do so, set <parameter>mode</parameter> to
<literal>1</literal>, or use the constant
<constant>COUNT_RECURSIVE</constant>. The dafault value is
<literal>0</literal>. For example, recursive count is usefull counting the
elements of multidimensional arrays.
If the optional <parameter>mode</parameter> parameter is set to
<constant>COUNT_RECURSIVE</constant> (or 1), <function>count</function>
will recursivly count the array. This is particularly useful for
counting all the elements of a multidimensional array. The default
value for <parameter>mode</parameter> is <literal>0</literal>.
</para>
<warning>
<caution>
<para>
<function>count</function> may return 0 for a variable that
isn't set, but it may also return 0 for a variable that has
been initialized with an empty array. Use
<function>isset</function> to test if a variable is set.
</para>
</warning>
</caution>
<para>
Please see the <link linkend="language.types.array">Arrays</link>
section of the manual for a detailed explanation of how arrays
@ -81,8 +80,8 @@ $result = count ($b);
<programlisting role="php">
<![CDATA[
<?php
$food = $food = array( 'fruits' => array('orange', 'banana', 'apple'),
'veggie' => array('carrot', 'collard','pea'));
$food = array( 'fruits' => array('orange', 'banana', 'apple'),
'veggie' => array('carrot', 'collard','pea'));
// recursive count
echo count($food,COUNT_RECURSIVE); // output 8