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<refentry xml:id="function.implode" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>implode</refname>
  <refpurpose>Join array elements with a string</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>string</type><methodname>implode</methodname>
   <methodparam><type>string</type><parameter>separator</parameter></methodparam>
   <methodparam><type>array</type><parameter>array</parameter></methodparam>
  </methodsynopsis>
  <simpara>Alternative signature (not supported with named arguments):</simpara>
  <methodsynopsis>
   <type>string</type><methodname>implode</methodname>
   <methodparam><type>array</type><parameter>array</parameter></methodparam>
  </methodsynopsis>
  <simpara>Legacy signature (deprecated as of PHP 7.4.0, removed as of PHP 8.0.0):</simpara>
  <methodsynopsis>
   <type>string</type><methodname>implode</methodname>
   <methodparam><type>array</type><parameter>array</parameter></methodparam>
   <methodparam><type>string</type><parameter>separator</parameter></methodparam>
  </methodsynopsis>
  <para>
   Join array elements with a <parameter>separator</parameter> string.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>separator</parameter></term>
     <listitem>
      <para>
       Defaults to an empty string.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>array</parameter></term>
     <listitem>
      <para>
       The array of strings to implode.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns a string containing a string representation of all the array
   elements in the same order, with the separator string between each element.
  </para>
 </refsect1>

 <refsect1 role="changelog"><!-- {{{ -->
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>8.0.0</entry>
      <entry>
       Passing the <parameter>separator</parameter> after the <parameter>array</parameter>
       is no longer supported.
      </entry>
     </row>
     <row>
      <entry>7.4.0</entry>
      <entry>
       Passing the <parameter>separator</parameter> after the <parameter>array</parameter>
       (i.e. using the legacy signature) has been deprecated.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1><!-- }}} -->

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>implode</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php

$array = array('lastname', 'email', 'phone');
$comma_separated = implode(",", $array);

echo $comma_separated; // lastname,email,phone

// Empty string when using an empty array:
var_dump(implode('hello', array())); // string(0) ""

?>
]]>
    </programlisting>
   </example>   
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  &note.bin-safe;
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>explode</function></member>
    <member><function>preg_split</function></member>
    <member><function>http_build_query</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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