reference/array/functions/array-filter.xml
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31cacb6f262f455c616094cfe6d09bc0d1df2748
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<methodsynopsis>
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<type>array</type><methodname>array_filter</methodname>
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<methodparam><type>array</type><parameter>array</parameter></methodparam>
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<methodparam choice="opt"><type>callable</type><parameter>callback</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>flag</parameter><initializer>0</initializer></methodparam>
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<methodparam choice="opt"><type class="union"><type>callable</type><type>null</type></type><parameter>callback</parameter><initializer>&null;</initializer></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>mode</parameter><initializer>0</initializer></methodparam>
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</methodsynopsis>
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<para>
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Iterates over each value in the <parameter>array</parameter>
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</varlistentry>
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<varlistentry>
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<term><parameter>flag</parameter></term>
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<term><parameter>mode</parameter></term>
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<listitem>
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<para>
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Flag determining what arguments are sent to <parameter>callback</parameter>:
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</thead>
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<tbody>
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<row>
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<entry>5.6.0</entry>
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<entry>8.0.0</entry>
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<entry>
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Added optional <parameter>flag</parameter> parameter and constants
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<constant>ARRAY_FILTER_USE_KEY</constant> and
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<constant>ARRAY_FILTER_USE_BOTH</constant>
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<parameter>callback</parameter> is nullable now.
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</entry>
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</row>
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&array.changelog.by-ref;
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</tbody>
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</tgroup>
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</informaltable>
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</example>
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<example>
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<title><function>array_filter</function> with
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<parameter>flag</parameter></title>
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<parameter>mode</parameter></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>array_intersect</function></member>
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<member><function>array_map</function></member>
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<member><function>array_reduce</function></member>
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<member><function>array_walk</function></member>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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