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10 years ago
Working with Oracle and raw types in and out worked like the following for me.

<?php
  /*oracle procedure
  procedure open_session(
    i_instance_id in raw,
    o_session_id out raw,
    o_errcode out number,
    o_errmsg out varchar2
  );  
  */

  //open database
  $conn = DBOpen( DB_DEV_USER );

  //get session id
  $sql = "begin p_loader.open_session( hextoraw( :instance_id ), :session_id, :errcode, :errmsg ); end;";
  $stmt = oci_parse( $conn, $sql );
  $instanceId = DB_INSTANCE_ID;
  oci_bind_by_name( $stmt, ":instance_id", $instanceId, 1, SQLT_CHR );
  oci_bind_by_name( $stmt, ":session_id", $sessionId, 16, SQLT_BIN );
  oci_bind_by_name( $stmt, ":errcode", $errcode, 12, SQLT_INT );
  oci_bind_by_name( $stmt, ":errmsg", $errmsg, 4000, SQLT_CHR );
  
  oci_execute( $stmt );
  $sessionId = bin2hex( $sessionId ); //now this is a hex string
  
  //close database
  DBClose( $conn );
?>
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