array-push.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.array-push" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>array_push</refname>
  <refpurpose>Push one or more elements onto the end of array</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>int</type><methodname>array_push</methodname>
   <methodparam><type>array</type><parameter role="reference">array</parameter></methodparam>
   <methodparam rep="repeat"><type>mixed</type><parameter>values</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>array_push</function> treats <parameter>array</parameter> as a
   stack, and pushes the passed variables onto the end of
   <parameter>array</parameter>. The length of <parameter>array</parameter>
   increases by the number of variables pushed. Has the same effect as:
   <programlisting role="php">
<![CDATA[
<?php
$array[] = $var;
?>
]]>
   </programlisting>
   repeated for each passed value.
  </para>
  <note>
   <simpara>
    If you use <function>array_push</function> to add one element to the
    array, it's better to use <literal>$array[] = </literal> because in that
    way there is no overhead of calling a function.
   </simpara>
  </note>
  <note>
   <simpara>
    <function>array_push</function> will raise a warning if the first
    argument is not an array. This differed from the
    <literal>$var[]</literal> behaviour where a new array was created, prior to PHP 7.1.0.
   </simpara>
  </note>
 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>array</parameter></term>
     <listitem>
      <para>
       The input array.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>values</parameter></term>
     <listitem>
      <para>
       The values to push onto the end of the <parameter>array</parameter>.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the new number of elements in the array.
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <para>
   <informaltable>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>&Version;</entry>
       <entry>&Description;</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>7.3.0</entry>
       <entry>
        This function can now be called with only one parameter. Formerly, at
        least two parameters have been required.
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>array_push</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
$stack = array("orange", "banana");
array_push($stack, "apple", "raspberry");
print_r($stack);
?>
]]>
    </programlisting>
    &example.outputs;
    <screen role="php">
<![CDATA[
Array
(
    [0] => orange
    [1] => banana
    [2] => apple
    [3] => raspberry
)
]]>
    </screen>
   </example>
  </para>
 </refsect1>
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>array_pop</function></member>
    <member><function>array_shift</function></member>
    <member><function>array_unshift</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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