使用PHP查詢MDB文件並返回JSON

Question

我有一個Microsoft Access數據庫，並且我試圖使用PHP查詢表，並輸出有效的JSON。我有一個MSSQL數據庫的等效代碼，我試圖讓我的代碼做同樣的事情，但只是爲Access數據庫。

這裏是MSSQL代碼

$myServer = "server"; 
$myDB = "db"; 
$conn = sqlsrv_connect ($myServer, array('Database'=>$myDB)); 

$sql = "SELECT * 
     FROM db.dbo.table"; 

$data = sqlsrv_query ($conn, $sql); 

$result = array(); 

do { 
    while ($row = sqlsrv_fetch_array ($data, SQLSRV_FETCH_ASSOC)) { 
     $result[] = $row; 
    } 
} while (sqlsrv_next_result($data)); 

$json = json_encode ($result); 

sqlsrv_free_stmt ($data); 
sqlsrv_close ($conn); 

這裏是我試過的MDB文件

$dbName = "/filename.mdb"; 

if (!file_exists($dbName)) { 
    die("Could not find database file."); 
} 

$db = odbc_connect("Driver={Microsoft Access Driver (*.mdb)};Dbq=$dbName", $user, $password); 

$sql = "SELECT * 
     FROM cemetery"; 

$data = $db->query($sql); // I'm getting an error here 
$result = array(); 

// Not sure what do do for this part... 
do { 
    while ($row = fetch($data, SQLSRV_FETCH_ASSOC)) { 
     $result[] = $row; 
    } 
} while (sqlsrv_next_result($data)); 

$json = json_encode ($result); 

我有種遵循了這一嘗試連接到數據庫：http://phpmaster.com/using-an-access-database-with-php/

目前這給我一個500內部服務器錯誤。我期待一個字符串，如本應保存在變量$json

[ 
    { 
     "col1":"col value", 
     "col2":"col value", 
     "col3":"col value", 
    }, 
    { 
     "col1":"col value", 
     "col2":"col value", 
     "col3":"col value", 
    }, 
    { 
     etc... 
    } 
] 

有人可以幫助我端口MSSQL代碼我上面，所以我可以用一個MDB數據庫使用它呢？謝謝您的幫助！

---

編輯：我註釋掉線一個接一個，而它拋出我的500錯誤在該行$data = $db->query($sql);。我查看了錯誤日誌，並收到錯誤Call to a member function query() on a non-object。我已經在我的php.ini文件中取消註釋extension=php_pdo_odbc.dll。任何人都知道問題可能是什麼？

Answer 1

我終於想通了。

<?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 2

你只需要1環， 使用fetchall是您的朋友可迭代：

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

Answer 3

odbc_connect沒有返回一個對象，它返回一個資源。見（http://php.net/manual/en/function.odbc-connect.php），所以你需要做這樣的事情。

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

，然後你可以遍歷結果..

還看到：

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

Answer 4

我用這個代碼從一個ODBC查詢結果爲JSON陣列：

$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; 

而且finnally編碼JSON格式的響應：

echo json_encode($response);