php-doc-en/reference/tokenizer/functions/token-get-all.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.token-get-all" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>token_get_all</refname>
  <refpurpose>Split given source into PHP tokens</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>array</type><methodname>token_get_all</methodname>
   <methodparam><type>string</type><parameter>source</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>flags</parameter><initializer>0</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>token_get_all</function> parses the given <parameter>source</parameter> 
   string into PHP language tokens using the Zend engine&apos;s lexical scanner.
  </para>
  <para>
   For a list of parser tokens, see <xref linkend="tokens"/>, or use 
   <function>token_name</function> to translate a token value into its string
   representation.
  </para>
 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>source</parameter></term>
     <listitem>
      <para>
       The PHP source to parse.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>flags</parameter></term>
     <listitem>
      <para>
       Valid flags:
       <itemizedlist>
        <listitem>
         <simpara>
          <constant>TOKEN_PARSE</constant> - Recognises the ability to use
          reserved words in specific contexts.
         </simpara>
        </listitem>
       </itemizedlist>
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   An array of token identifiers. Each individual token identifier is either
   a single character (i.e.: <literal>;</literal>, <literal>.</literal>, 
   <literal>&gt;</literal>, <literal>!</literal>, etc...),
   or a three element array containing the token index in element 0, the string
   content of the original token in element 1 and the line number in element 2.
  </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>7.0.0</entry>
       <entry>
        Added the optional <parameter>flags</parameter> parameter along with
        the <constant>TOKEN_PARSE</constant> flag.
       </entry>
      </row>
      <row>
       <entry>5.2.2</entry>
       <entry>
        Line numbers are returned in element 2
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>
 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>token_get_all</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
$tokens = token_get_all('<?php echo; ?>');

foreach ($tokens as $token) {
    if (is_array($token)) {
        echo "Line {$token[2]}: ", token_name($token[0]), " ('{$token[1]}')", PHP_EOL;
    }
}
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
Line 1: T_OPEN_TAG ('<?php ')
Line 1: T_ECHO ('echo')
Line 1: T_WHITESPACE (' ')
Line 1: T_CLOSE_TAG ('?>')
]]>
    </screen>
   </example>
  </para>
  <para>
   <example>
    <title><function>token_get_all</function> incorrect usage example</title>
    <programlisting role="php">
<![CDATA[
<?php
$tokens = token_get_all('/* comment */');

foreach ($tokens as $token) {
    if (is_array($token)) {
        echo "Line {$token[2]}: ", token_name($token[0]), " ('{$token[1]}')", PHP_EOL;
    }
}
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
Line 1: T_INLINE_HTML ('/* comment */')
]]>
    </screen>
   </example>
   Note in the previous example that the string is parsed as
   <constant>T_INLINE_HTML</constant> rather than the expected
   <constant>T_COMMENT</constant>. This is because no open tag was used in the
   code provided. This would be equivalent to putting a comment outside of the
   PHP tags in a normal file.
  </para>
  <para>
   <example>
    <title>
     <function>token_get_all</function> on a class using a reserved word example
    </title>
    <programlisting role="php">
<![CDATA[
<?php

$source = <<<'code'
<?php

class A
{
    const PUBLIC = 1;
}
code;

$tokens = token_get_all($source, TOKEN_PARSE);

foreach ($tokens as $token) {
    if (is_array($token)) {
        echo token_name($token[0]) , PHP_EOL;
    }
}
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
T_OPEN_TAG
T_WHITESPACE
T_CLASS
T_WHITESPACE
T_STRING
T_CONST
T_WHITESPACE
T_STRING
T_LNUMBER
]]>
    </screen>
   </example>
   Without the <constant>TOKEN_PARSE</constant> flag, the penultimate
   token (<constant>T_STRING</constant>) would have been
   <constant>T_PUBLIC</constant>.
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>token_name</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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