php-doc-en/reference/tokenizer/functions/token-name.xml

<?xml version="1.0" encoding="iso-8859-1"?>
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  <refentry id="function.token-name">
   <refnamediv>
    <refname>token_name</refname>
    <refpurpose>Get the symbolic name of a given PHP token</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <methodsynopsis>
     <type>string</type><methodname>token_name</methodname>
     <methodparam><type>int</type><parameter>token</parameter></methodparam>
    </methodsynopsis>
    <para>
     <function>token_name</function> returns the symbolic name for a PHP 
     <parameter>token</parameter> value. The symbolic name 
     returned matches the name of the matching token constant.
    </para> 
    <example>
     <title><function>token_name</function> example</title>
     <programlisting role="php">
<![CDATA[
<?php
  // 260 is the token value for the T_REQUIRE token
  echo token_name(260);        // -> "T_REQUIRE"

  // a token constant maps to its own name
  echo token_name(T_FUNCTION); // -> "T_FUNCTION"
?>
]]>
     </programlisting>
    </example>
    <para>
     See also <link linkend="tokens">List of Parser Tokens</link>.
    </para>
   </refsect1>
  </refentry>

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