转换使用OCI的PHP脚本以使用PDO

Question

我一直在使用下面的使用OCI的PHP脚本使用DataTables ，但是由于我重新编写了整个站点以利用PDO，所以我现在需要更新此PHP脚本以同时使用PDO。

问题是没有报告错误消息（我已启用错误报告），但数据表为空。

我如何将其转换为利用PDO是否存在明显的错误？

OCI-可行！

// Database connection information
$sql = array(
    'user'     => 'user',
    'password' => 'pass',
    'server'   => '192.168.0.1',
    'db'       => 'A.world'
);

// Oracle connection
$conn = oci_connect($sql['user'], $sql['password'], $sql['server'].'/'.$sql['db']);//$connection_string);

if (!$conn) {
    $e = oci_error();
    trigger_error( htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR );
}


// Action
$out = dt_oci_ssp( $conn, $query, $_POST );

echo json_encode( $out );



/**
 * DataTables 1.10+ server-side processing function for Oracle using oci_*
 * methods
 * @param  resource $conn  Connection from `oci_connect`
 * @param  array $query    Information for the query to be performed
 * @param  array $data     Data from the server-side processing request
 * @return array           Data returned for server-side processing
 */
function dt_oci_ssp( $conn, $query, $data ) {
    $bindings = array();

    /*
     * Ordering
     */
    $orderBy = array();

    if ( isset( $data['order'] ) ) {
        for ( $i=0, $size=count( $data['order'] ) ; $i<$size ; ++$i ) {
            $sort = $data['order'][$i];

            //Add to the order by clause
            $orderBy[] = dt_oci_field( $query, $sort['column'] ) .' '. (
                $sort['dir'] === 'asc' ?
                    'asc' :
                    'desc'
                );
        }
    }

    $orderBy = count( $orderBy ) ?
        'ORDER BY '.implode(', ', $orderBy) :
        '';


    // Conditions
    $where = array();
    $whereJoinOnly = array();

    $globalWhere = array();

    for ( $i=0, $size=count( $data['columns'] ) ; $i<$size ; ++$i ) {
        $column = $data['columns'][$i];

        if ( $column['searchable'] && $data['search']['value'] ) {
            $bindings[':globalSearch'.$i] = '%'.$data['search']['value'].'%';
            $globalWhere[] = dt_oci_field( $query, $i ) ." LIKE :globalSearch".$i;
        }
    }

    if ( count( $globalWhere ) ) {
        $where[] .= '('.implode(' OR ', $globalWhere).')';
    }


    // Column filter
    for ( $i=0, $size=count( $data['columns'] ) ; $i<$size ; ++$i ) {
        $column = $data['columns'][$i];

        if ( $column['searchable'] && $column['search']['value'] ) {
            $bindings[':columnSearch'.$i] = '%'.$column['search']['value'].'%';
            $where[] = dt_oci_field( $query, $i ) ." LIKE :columnSearch".$i;
        }
    }


    // Joins
    for ( $i=0, $size=count( $query['conditions'] ) ; $i<$size ; ++$i ) {
        $where[] = $query['conditions'][$i];
        $whereJoinOnly[] = $query['conditions'][$i];
    }

    $where = count( $where ) ?
        'WHERE '.implode( ' AND ', $where ) :
        '';

    $whereJoinOnly = count( $whereJoinOnly ) ?
        'WHERE '.implode( ' AND ', $whereJoinOnly ) :
        '';


    $tables = implode( ', ', $query['tables'] );

    $select = array();
    for ( $i=0, $size=count( $query['fields'] ) ; $i<$size ; ++$i ) {
        $select[] = dt_oci_field( $query, $i, 'select' ) .' as "'. dt_oci_field( $query, $i ).'"'; 
    }

    $select = implode( ', ', $select );


    $betweenLower = intval($data['start']);
    $betweenUpper = intval($data['start'] + $data['length']);

    if ( $data['length'] != -1 ) {
        $dataOut = dt_oci_exec( $conn, $bindings, <<<EOD
            SELECT a.*
            FROM (
                SELECT rownum rnum, b.*
                FROM (
                    SELECT $select
                    FROM $tables
                    $where
                    $orderBy
                ) b
                WHERE rownum <= $betweenUpper
            ) a
            WHERE rnum > $betweenLower
EOD
        );
    }
    else {
        // All records
        $dataOut = dt_oci_exec( $conn, $bindings, <<<EOD
            SELECT a.*
            FROM (
                SELECT rownum rnum, b.*
                FROM (
                    SELECT $select
                    FROM $tables
                    $where
                    $orderBy
                ) b
            ) a
EOD
        );
    }

    $filterCount = dt_oci_exec( $conn, $bindings, <<<EOD
        SELECT COUNT(*) as COUNT
        FROM $tables
        $where
        $orderBy
EOD
    );

    $fullCount = dt_oci_exec( $conn, $bindings, <<<EOD
        SELECT COUNT(*) as COUNT
        FROM $tables
        $whereJoinOnly
EOD
    );


    // Output
    $out = array(
        'draw'            => intval( $data['draw'] ),
        'data'            => array(),
        'recordsFiltered' => intval($filterCount['COUNT'][0]),
        'recordsTotal'    => intval($fullCount['COUNT'][0])
    );

    for ( $i=0, $ien=count($dataOut['RNUM']) ; $i<$ien ; ++$i ) {
        $row = array();

        for ( $j=0, $jen=count($data['columns']) ; $j<$jen ; ++$j ) {
            $row[] = $dataOut[ dt_oci_field( $query, $j ) ][$i];
        }

        $out['data'][] = $row;
    }

    return $out;
}


/**
 * Get a field property for a query
 * @param  array   $query Query information
 * @param  integer $idx   Field index
 * @param  string  $type  `name` or `select`
 * @return string         column name
 */
function dt_oci_field ( $query, $idx, $type='name' ) {
    if ( is_array( $query['fields'][$idx] ) ) {
        return $query['fields'][$idx][$type];
    }

    return $query['fields'][$idx];
}


/**
 * Perform a SQL command, returning the full result set
 * @param  resource $conn     Connection from `oci_connect`
 * @param  array    $bindings Binding information to use
 * @param  string   $query    SQL query
 * @return array              Results
 */
function dt_oci_exec( $conn, $bindings, $query )
{
    $stmt = oci_parse( $conn, trim($query) );

    foreach ($bindings as $key => $value) {
        if ( strpos( $query, $key) ) {
            oci_bind_by_name( $stmt, $key, $value );
        }
    }

    oci_execute( $stmt );
    oci_fetch_all( $stmt, $data );
    oci_free_statement( $stmt );

    return $data;

PDO-不起作用！ 没有错误消息，连接正常，但没有数据传递回DataTables：<

// Oracle connection
$dbh = new PDO('oci:dbname=//192.168.0.1:1521/A.world', 'user', 'pass', array(PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING));


// Action
$out = dt_oci_ssp( $dbh, $query, $_POST );

echo json_encode( $out );



/**
 * DataTables 1.10+ server-side processing function for Oracle using oci_*
 * methods
 * @param  resource $dbh  Connection from `oci_connect`
 * @param  array $query    Information for the query to be performed
 * @param  array $data     Data from the server-side processing request
 * @return array           Data returned for server-side processing
 */
function dt_oci_ssp( $dbh, $query, $data ) {
    $bindings = array();

    /*
     * Ordering
     */
    $orderBy = array();

    if ( isset( $data['order'] ) ) {
        for ( $i=0, $size=count( $data['order'] ) ; $i<$size ; ++$i ) {
            $sort = $data['order'][$i];

            //Add to the order by clause
            $orderBy[] = dt_oci_field( $query, $sort['column'] ) .' '. (
                $sort['dir'] === 'asc' ?
                    'asc' :
                    'desc'
                );
        }
    }

    $orderBy = count( $orderBy ) ?
        'ORDER BY '.implode(', ', $orderBy) :
        '';


    // Conditions
    $where = array();
    $whereJoinOnly = array();

    $globalWhere = array();

    for ( $i=0, $size=count( $data['columns'] ) ; $i<$size ; ++$i ) {
        $column = $data['columns'][$i];

        if ( $column['searchable'] && $data['search']['value'] ) {
            $bindings[':globalSearch'.$i] = '%'.$data['search']['value'].'%';
            $globalWhere[] = dt_oci_field( $query, $i ) ." LIKE :globalSearch".$i;
        }
    }

    if ( count( $globalWhere ) ) {
        $where[] .= '('.implode(' OR ', $globalWhere).')';
    }


    // Column filter
    for ( $i=0, $size=count( $data['columns'] ) ; $i<$size ; ++$i ) {
        $column = $data['columns'][$i];

        if ( $column['searchable'] && $column['search']['value'] ) {
            $bindings[':columnSearch'.$i] = '%'.$column['search']['value'].'%';
            $where[] = dt_oci_field( $query, $i ) ." LIKE :columnSearch".$i;
        }
    }


    // Joins
    for ( $i=0, $size=count( $query['conditions'] ) ; $i<$size ; ++$i ) {
        $where[] = $query['conditions'][$i];
        $whereJoinOnly[] = $query['conditions'][$i];
    }

    $where = count( $where ) ?
        'WHERE '.implode( ' AND ', $where ) :
        '';

    $whereJoinOnly = count( $whereJoinOnly ) ?
        'WHERE '.implode( ' AND ', $whereJoinOnly ) :
        '';


    $tables = implode( ', ', $query['tables'] );

    $select = array();
    for ( $i=0, $size=count( $query['fields'] ) ; $i<$size ; ++$i ) {
        $select[] = dt_oci_field( $query, $i, 'select' ) .' as "'. dt_oci_field( $query, $i ).'"'; 
    }

    $select = implode( ', ', $select );


    $betweenLower = intval($data['start']);
    $betweenUpper = intval($data['start'] + $data['length']);

    if ( $data['length'] != -1 ) {
        $dataOut = dt_oci_exec( $dbh, $bindings, <<<EOD
            SELECT a.*
            FROM (
                SELECT rownum rnum, b.*
                FROM (
                    SELECT $select
                    FROM $tables
                    $where
                    $orderBy
                ) b
                WHERE rownum <= $betweenUpper
            ) a
            WHERE rnum > $betweenLower
EOD
        );
    }
    else {
        // All records
        $dataOut = dt_oci_exec( $dbh, $bindings, <<<EOD
            SELECT a.*
            FROM (
                SELECT rownum rnum, b.*
                FROM (
                    SELECT $select
                    FROM $tables
                    $where
                    $orderBy
                ) b
            ) a
EOD
        );
    }

    $filterCount = dt_oci_exec( $dbh, $bindings, <<<EOD
        SELECT COUNT(*) as COUNT
        FROM $tables
        $where
        $orderBy
EOD
    );

    $fullCount = dt_oci_exec( $dbh, $bindings, <<<EOD
        SELECT COUNT(*) as COUNT
        FROM $tables
        $whereJoinOnly
EOD
    );


    // Output
    $out = array(
        'draw'            => intval( $data['draw'] ),
        'data'            => array(),
        'recordsFiltered' => intval($filterCount['COUNT'][0]),
        'recordsTotal'    => intval($fullCount['COUNT'][0])
    );

    for ( $i=0, $ien=count($dataOut['RNUM']) ; $i<$ien ; ++$i ) {
        $row = array();

        for ( $j=0, $jen=count($data['columns']) ; $j<$jen ; ++$j ) {
            $row[] = $dataOut[ dt_oci_field( $query, $j ) ][$i];
        }

        $out['data'][] = $row;
    }

    return $out;
}


/**
 * Get a field property for a query
 * @param  array   $query Query information
 * @param  integer $idx   Field index
 * @param  string  $type  `name` or `select`
 * @return string         column name
 */
function dt_oci_field ( $query, $idx, $type='name' ) {
    if ( is_array( $query['fields'][$idx] ) ) {
        return $query['fields'][$idx][$type];
    }

    return $query['fields'][$idx];
}


/**
 * Perform a SQL command, returning the full result set
 * @param  resource $dbh      Connection from `oci_connect`
 * @param  array    $bindings Binding information to use
 * @param  string   $query    SQL query
 * @return array              Results
 */
function dt_oci_exec( $dbh, $bindings, $query )
{
 try {
  $stmt = $dbh->prepare($query);

  foreach ($bindings as $key => $value) {
   if ( strpos( $query, $key) ) {
    $stmt->bindParam(":$key", $value);
   }
  }

  $stmt->execute();
  $data = $stmt->fetchAll();
  $stmt = null;

  return $data;
 } catch (PDOException $e) {
  echo 'Connection failed: ' . $e->getMessage();
 }
}

我已经坐了两个小时，并且都看了两个代码，据我所知我已经将其转换为使用正确的PDO命令等。

Answer 1

引号错误：

$stmt->bindParam(':$key', $value);
                 ^-----^--

'引号引起来的字符串不会插值变量值，因此您要绑定一个名称$ ， k ， e等的占位符，该占位符在查询中不存在。 因此绑定失败，并且由于您的代码中没有错误处理，因此您永远不会看到PDO可能给您的错误消息。

永远不要假设成功。 始终假设失败，检查失败，并将成功视为惊喜。

尝试

$stmt->bindParam(":$key", $value);
                 ^-----^---

代替。