Running a command for each value comming back from an ODBC query in PHP

I have a need to read an ODBC datasource and run a query on a particual table. For each unique value of the table, I need to run a command in the shell.

Here is anexample:

<?php
    $values = Array() ;
    $command = "echo" ; /* for the example purposes the command is echo */
    $columnName = "state" ; /* just for this example */

    $hdbc = odbc_connect ( "dsn-name", NULL, NULL ) ;
    if ( $hdbc != NULL )
    {
        $hstmt = odbc_prepare(
                     $hdbc
                     , "select distinct " . $columnName . " from tablename"
                  ) ;
        if ( $hstmt != NULL )
            if ( odbc_execute( $hstmt ))
            {
                while ( odbc_fetch_row( $hstmt ))
                    $values[] = odbc_result( $hstmt, 1 ) ;
            }
            else
                printf( "*** Unable to execute\n" ) ;
        else
            printf( "*** Unable to prepare the query.\n" ) ;

        odbc_close( $hdbc ) ;
    }
    else
        printf( "*** Unable to connect\n" ) ;

    foreach ( $values as $value )
        system( $command . " \"" . $value . "\"" ) ;
?>