Using PHP to query a MDB file, and return JSON

Question

I have a Microsoft Access Database, and I am trying to query the table using PHP, and output valid JSON. I have an equivalent code for a MSSQL database, am I am trying to make m

Answer 1

You only need 1 loop, fetchAll is your iterable friend:

while ($row = $data->fetchAll(SQLSRV_FETCH_ASSOC)) {
    $result[] = $row;   
}

Answer 2

odbc_connect doesn't return an object, it returns a resource. see (http://php.net/manual/en/function.odbc-connect.php) so you would need to do something like this.

 $db = odbc_connect("Driver={Microsoft Access Driver (*.mdb)};Dbq=$dbName", $user, $password);
 $oexec = obdc_exec($db,$sql);
  $result[] = odbc_fetch_array($oexec);

and then you can iterate over results..

see also:

http://www.php.net/manual/en/function.odbc-fetch-array.php http://www.php.net/manual/en/function.odbc-exec.php

Answer 3

I finally figured it out.

<?php
// Location of database. For some reason I could only get it to work in
// the same location as the site. It's probably an easy fix though
$dbName = "dbName.mdb";
$tName = "table";

// Throws an error if the database cannot be found
if (!file_exists($dbName)) {
    die("Could not find database file.");
}

// Connects to the database
// Assumes there is no username or password
$conn = odbc_connect("Driver={Microsoft Access Driver (*.mdb)};Dbq=$dbName", '', '');

// This is the query
// You have to have each column you select in the format tableName.[ColumnName]
$sql = "SELECT $tName.[ColumnOne], $tName.[ColumnTwo], etc...
        FROM $dbName.$tName";

// Runs the query above in the table
$rs = odbc_exec($conn, $sql);

// This message is displayed if the query has an error in it 
if (!$rs) {
    exit("There is an error in the SQL!");
}

$data = array();
$i = 0;

// Grabs all the rows, saves it in $data
while( $row = odbc_fetch_array($rs) ) {
    $data[$i] = $row;
    $i++;
} 

odbc_close($conn); // Closes the connection
$json = json_encode($data); // Generates the JSON, saves it in a variable
?>

Answer 4

I use this code to get results from an ODBC query into a JSON array:

$response = null;
$conn = null;

try {
  $odbc_name = 'myODBC'; //<-ODBC connectyion name as is in the Windows "Data Sources (ODBC) administrator"

  $sql_query = "SELECT * FROM table;";

  $conn = odbc_connect($odbc_name, 'user', 'pass');
  $result = odbc_exec($conn, $sql_query);

  //this will show all results:
  //echo odbc_result_all($result);

  //this will fetch row by row and allows to change column name, format, etc:     
  while( $row = odbc_fetch_array($result) ) { 
     $json['cod_sistema'] = $row['cod_sistema'];
     $json['sistema'] = $row['sistema'];
     $json['cod_subsistema'] = $row['cod_subsistema'];
     $json['sub_sistema'] = $row['sub_sistema'];
     $json['cod_funcion'] = $row['cod_funcion'];
     $json['funcion'] = $row['funcion'];
     $json['func_desc_abrev'] = $row['desc_abreviada'];
     $json['cod_tipo_funcion'] = $row['cod_tipo_funcion'];

     $response[] = array('funcionalidad' => $json);
  }

  odbc_free_result($result); //<- Release used resources

} catch (Exception $e) {
   $response = array('resultado' => 'err', 'detalle' => $e->getMessage());
   echo 'ERROR: ',  $e->getMessage(), "\n";
}
odbc_close($conn);
return $response;

And finnally encoding the response in JSON format:

echo json_encode($response);