在PDO中不可能使用这样的数组。

你需要为每个值构建一个带参数的字符串(或使用?)，例如:

: an_array_0: an_array_1: an_array_2 an_array_3,:: an_array_5 an_array_4

这里有一个例子:

<?php
$ids = array(1,2,3,7,8,9);
$sqlAnArray = join(
    ', ',
    array_map(
        function($index) {
            return ":an_array_$index";
        },
        array_keys($ids)
    )
);
$db = new PDO(
    'mysql:dbname=mydb;host=localhost',
    'user',
    'passwd'
);
$stmt = $db->prepare(
    'SELECT *
     FROM table
     WHERE id IN('.$sqlAnArray.')'
);
foreach ($ids as $index => $id) {
    $stmt->bindValue("an_array_$index", $id);
}

如果你想继续使用bindParam，你可以这样做:

foreach ($ids as $index => $id) {
    $stmt->bindParam("an_array_$index", $ids[$id]);
}

如果你想用?占位符，你可以这样做:

<?php
$ids = array(1,2,3,7,8,9);
$sqlAnArray = '?' . str_repeat(', ?', count($ids)-1);
$db = new PDO(
    'mysql:dbname=dbname;host=localhost',
    'user',
    'passwd'
);
$stmt = $db->prepare(
    'SELECT *
     FROM phone_number_lookup
     WHERE country_code IN('.$sqlAnArray.')'
);
$stmt->execute($ids);

如果您不知道$ids是否为空，您应该测试它并相应地处理这种情况(返回一个空数组，或返回一个空对象，或抛出一个异常……)。

以下是我的解决方案:

$total_items = count($array_of_items);
$question_marks = array_fill(0, $total_items, '?');
$sql = 'SELECT * FROM foo WHERE bar IN (' . implode(',', $question_marks ). ')';

$stmt = $dbh->prepare($sql);
$stmt->execute(array_values($array_of_items));

注意array_values的使用。这可以修复键排序问题。

我正在合并id数组，然后删除重复的项。我是这样写的:

$ids = array(0 => 23, 1 => 47, 3 => 17);

那就是失败。

我扩展了PDO，做一些类似stefs建议的事情，从长远来看，这对我来说更容易:

class Array_Capable_PDO extends PDO {
    /**
     * Both prepare a statement and bind array values to it
     * @param string $statement mysql query with colon-prefixed tokens
     * @param array $arrays associatve array with string tokens as keys and integer-indexed data arrays as values 
     * @param array $driver_options see php documention
     * @return PDOStatement with given array values already bound 
     */
    public function prepare_with_arrays($statement, array $arrays, $driver_options = array()) {

        $replace_strings = array();
        $x = 0;
        foreach($arrays as $token => $data) {
            // just for testing...
            //// tokens should be legit
            //assert('is_string($token)');
            //assert('$token !== ""');
            //// a given token shouldn't appear more than once in the query
            //assert('substr_count($statement, $token) === 1');
            //// there should be an array of values for each token
            //assert('is_array($data)');
            //// empty data arrays aren't okay, they're a SQL syntax error
            //assert('count($data) > 0');

            // replace array tokens with a list of value tokens
            $replace_string_pieces = array();
            foreach($data as $y => $value) {
                //// the data arrays have to be integer-indexed
                //assert('is_int($y)');
                $replace_string_pieces[] = ":{$x}_{$y}";
            }
            $replace_strings[] = '('.implode(', ', $replace_string_pieces).')';
            $x++;
        }
        $statement = str_replace(array_keys($arrays), $replace_strings, $statement);
        $prepared_statement = $this->prepare($statement, $driver_options);

        // bind values to the value tokens
        $x = 0;
        foreach($arrays as $token => $data) {
            foreach($data as $y => $value) {
                $prepared_statement->bindValue(":{$x}_{$y}", $value);
            }
            $x++;
        }

        return $prepared_statement;
    }
}

你可以这样使用它:

$db_link = new Array_Capable_PDO($dsn, $username, $password);

$query = '
    SELECT     *
    FROM       test
    WHERE      field1 IN :array1
     OR        field2 IN :array2
     OR        field3 = :value
';

$pdo_query = $db_link->prepare_with_arrays(
    $query,
    array(
        ':array1' => array(1,2,3),
        ':array2' => array(7,8,9)
    )
);

$pdo_query->bindValue(':value', '10');

$pdo_query->execute();

你可以这样转换:

$stmt = $db->prepare('SELECT * FROM table WHERE id IN('.$in.')');

在此:

$stmt = $db->prepare('SELECT * FROM table WHERE id IN(:id1, :id2, :id3, :id7, :id8, :id9)');

然后用这个数组执行它:

$stmt->execute(array(
        :id1 =>1, :id2 =>2, :id3 =>3, :id7 =>7, :id8 =>8, :id9 => 9
    )
);

因此:

$in = array();
$consultaParam = array();
foreach($ids as $k => $v){
    $in[] = ':id'.$v;
    $consultaParam[':id'.$v] = $v;
}

最后的代码:

$ids = array(1,2,3,7,8,9);
$db = new PDO(...);

$in = array();
$consultaParam = array();
foreach($ids as $k => $v){
    $in[] = ':id'.$v;
    $consultaParam[':id'.$v] = $v;
}

$stmt = $db->prepare(
    'SELECT *
     FROM table
     WHERE id IN('.$in.')'
);
$stmt->execute($consultaParam);

下面是我的解决方案，基于alan_mm的答案。我还扩展了PDO类:

class Db extends PDO
{

    /**
     * SELECT ... WHERE fieldName IN (:paramName) workaround
     *
     * @param array  $array
     * @param string $prefix
     *
     * @return string
     */
    public function CreateArrayBindParamNames(array $array, $prefix = 'id_')
    {
        $newparams = [];
        foreach ($array as $n => $val)
        {
            $newparams[] = ":".$prefix.$n;
        }
        return implode(", ", $newparams);
    }

    /**
     * Bind every array element to the proper named parameter
     *
     * @param PDOStatement $stmt
     * @param array        $array
     * @param string       $prefix
     */
    public function BindArrayParam(PDOStatement &$stmt, array $array, $prefix = 'id_')
    {
        foreach($array as $n => $val)
        {
            $val = intval($val);
            $stmt -> bindParam(":".$prefix.$n, $val, PDO::PARAM_INT);
        }
    }
}

下面是上面代码的示例用法:

$idList = [1, 2, 3, 4];
$stmt = $this -> db -> prepare("
  SELECT
    `Name`
  FROM
    `User`
  WHERE
    (`ID` IN (".$this -> db -> CreateArrayBindParamNames($idList)."))");
$this -> db -> BindArrayParam($stmt, $idList);
$stmt -> execute();
foreach($stmt as $row)
{
    echo $row['Name'];
}

因为我做了很多动态查询，所以这是我做的一个超级简单的helper函数。

public static function bindParamArray($prefix, $values, &$bindArray)
{
    $str = "";
    foreach($values as $index => $value){
        $str .= ":".$prefix.$index.",";
        $bindArray[$prefix.$index] = $value;
    }
    return rtrim($str,",");     
}

像这样使用它:

$bindString = helper::bindParamArray("id", $_GET['ids'], $bindArray);
$userConditions .= " AND users.id IN($bindString)";

返回一个字符串:id1，:id2，:id3，并更新你的$bindArray绑定，当你需要运行你的查询时。简单!