php-doc-en/reference/mysql/constants.xml

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<section id="mysql.constants">
 &reftitle.constants;
 &extension.constants;
 <para>
  Since PHP 4.3.0 it is possible to specify additional client flags for the
  <function>mysql_connect</function> and <function>mysql_pconnect</function>
  functions. The following constants are defined:
  <table>
   <title>MySQL client constants</title>
    <tgroup cols="2">
     <thead>
      <row>
       <entry>constant</entry>
       <entry>description</entry>
      </row>
     </thead>
     <tbody>
      <row>
       <entry>MYSQL_CLIENT_COMPRESS</entry>
       <entry>use compression protocol</entry>
      </row>
      <row>
       <entry>MYSQL_CLIENT_IGNORE_SPACE</entry>
       <entry>Allow space after function names</entry>
      </row>
      <row>
       <entry>MYSQL_CLIENT_INTERACTIVE</entry>
       <entry>Allow interactive_timeout seconds (instead of wait_timeout) of
        inactivity before closing the connection.</entry>
      </row>
      <row>
       <entry>MYSQL_CLIENT_SSL</entry>
       <entry>use SSL (encrypted protocol)</entry>
      </row>
     </tbody>
    </tgroup>
  </table>
 </para>

 <para>
  The function <function>mysql_fetch_array</function> uses a constant for
  the different types of result arrays. The following constants are
  defined:
  <table>
   <title>MySQL fetch constants</title>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>constant</entry>
      <entry>description</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>MYSQL_ASSOC</entry>
      <entry>
       Columns are returned into the array having the fieldname as the array
       index.
      </entry>
     </row>
     <row>
      <entry>MYSQL_BOTH</entry>
      <entry>
       Columns are returned into the array having both a numerical index
       and the fieldname as the array index.
      </entry>
     </row>
     <row>
      <entry>MYSQL_NUM</entry>
      <entry>
       Columns are returned into the array having a numerical index to the
       fields. This index starts with 0, the first field in the result.
      </entry>
     </row>
     <row>
      <entry>MYSQL_STORE_RESULT</entry>
      <entry>
       Specifies that the MySQL result should be buffered.
      </entry>
     </row>
     <row>
      <entry>MYSQL_USE_RESULT</entry>
      <entry>
       Specifies that the MySQL result should not be buffered.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </table>
 </para>
</section>

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