php-doc-en/reference/expect/functions/expect-expectl.xml

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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.expect-expectl">
 <refnamediv>
  <refname>expect_expectl</refname>
  <refpurpose>Waits until the output from a process matches one
  of the patterns, a specified time period has passed, or an <acronym>EOF</acronym> is seen
  </refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>int</type><methodname>expect_expectl</methodname>
   <methodparam><type>resource</type><parameter>expect</parameter></methodparam>
   <methodparam><type>array</type><parameter>cases</parameter></methodparam>
   <methodparam choice="opt"><type>array</type><parameter role="reference">match</parameter></methodparam>
  </methodsynopsis>
  <para>
   Waits until the output from a process matches one of the patterns,
   a specified time period has passed, or an <acronym>EOF</acronym> is seen.
  </para>
  <para>
   If <parameter>match</parameter> is provided, then it is filled with the result of search.
   The matched string can be found in <parameter>match[0]</parameter>.
   The match substrings (according to the parentheses) in the original pattern can be found
   in <parameter>match[1]</parameter>, <parameter>match[2]</parameter>, and so
   on, up to <parameter>match[9]</parameter> (the limitation of libexpect).
  </para>
 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>expect</parameter></term>
     <listitem>
      <para>
       An Expect stream, previously opened with
       <function>expect_popen</function>.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>cases</parameter></term>
     <listitem>
      <para>
       An array of expect cases. Each expect case is an indexed array,
       as described in the following table:
       <table>
        <title>Expect Case Array</title>
        <tgroup cols="5">
         <thead>
          <row>
           <entry>Index Key</entry>
           <entry>Value Type</entry>
           <entry>Description</entry>
           <entry>Is Mandatory</entry>
           <entry>Default Value</entry>
          </row>
         </thead>
         <tbody>
          <row>
           <entry>0</entry>
           <entry>string</entry>
           <entry>pattern, that will be matched against the output from the stream</entry>
           <entry>yes</entry>
           <entry></entry>
          </row>
          <row>
           <entry>1</entry>
           <entry>mixed</entry>
           <entry>value, that will be returned by this function, if the pattern matches</entry>
           <entry>yes</entry>
           <entry></entry>
          </row>
          <row>
           <entry>2</entry>
           <entry>integer</entry>
           <entry>
            pattern type, one of:
            <link linkend="constants.expect.exp-glob"><constant>EXP_GLOB</constant></link>,
            <link linkend="constants.expect.exp-exact"><constant>EXP_EXACT</constant></link>
            or
            <link linkend="constants.expect.exp-regexp"><constant>EXP_REGEXP</constant></link>
           </entry>
           <entry>no</entry>
           <entry><link linkend="constants.expect.exp-glob"><constant>EXP_GLOB</constant></link></entry>
          </row>
         </tbody>
        </tgroup>
       </table>
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>
 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns value associated with the pattern that was matched.
  </para>
  <para>
   On failure this function returns:
   <link linkend="constants.expect.exp-eof"><constant>EXP_EOF</constant></link>,
   <link linkend="constants.expect.exp-timeout"><constant>EXP_TIMEOUT</constant></link>
   or
   <link linkend="constants.expect.exp-fullbuffer"><constant>EXP_FULLBUFFER</constant></link>
  </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>0.2.1</entry>
       <entry>
       Prior to version 0.2.1, in <parameter>match</parameter> parameter a match string was returned,
       not an array of match substrings.
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>
 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>expect_expectl</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
// Copies file from remote host:
ini_set("expect.timeout", 30);

$stream = fopen("expect://scp user@remotehost:/var/log/messages /home/user/messages.txt", "r");

$cases = array(
    // array(pattern, value to return if pattern matched)
    array("password:", "asked for password"),
    array("yes/no)?",  "asked for yes/no")
);

while (true) {
    switch (expect_expectl($stream, $cases)) {
        case "asked for password":
            fwrite($stream, "my password\n");
            break;
        case "asked for yes/no":
            fwrite($stream, "yes\n");
            break;
        case EXP_TIMEOUT:
        case EXP_EOF:
            break 2; // break both the switch statement and the while loop
        default:
            die "Error has occurred!";
    }
}

fclose($stream);
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>expect_popen</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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