简单来说:

//$db = new PDO(...);
//$ids = array(...);

$qMarks = str_repeat('?,', count($ids) - 1) . '?';
$sth = $db->prepare("SELECT * FROM myTable WHERE id IN ($qMarks)");
$sth->execute($ids);

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!

在经历了同样的问题之后，我采用了一个更简单的解决方案(尽管仍然没有PDO::PARAM_ARRAY那样优雅):

给定数组$ids = array(2,4,32):

$newparams = array();
foreach ($ids as $n => $val){ $newparams[] = ":id_$n"; }

try {
    $stmt = $conn->prepare("DELETE FROM $table WHERE ($table.id IN (" . implode(", ",$newparams). "))");
    foreach ($ids as $n => $val){
        $stmt->bindParam(":id_$n", intval($val), PDO::PARAM_INT);
    }
    $stmt->execute();

．.． 等等

所以如果你正在使用一个混合值数组，你将需要更多的代码来测试你的值，然后再分配类型参数:

// inside second foreach..

$valuevar = (is_float($val) ? floatval($val) : is_int($val) ? intval($val) :  is_string($val) ? strval($val) : $val );
$stmt->bindParam(":id_$n", $valuevar, (is_int($val) ? PDO::PARAM_INT :  is_string($val) ? PDO::PARAM_STR : NULL ));

但是我还没有测试过这个。

我有一个独特的问题，在将即将被弃用的MySQL驱动程序转换为PDO驱动程序时，我必须创建一个函数，该函数可以动态地从相同的参数数组中构建正常参数和INs。所以我很快就做了这个:

/**
 * mysql::pdo_query('SELECT * FROM TBL_WHOOP WHERE type_of_whoop IN :param AND siz_of_whoop = :size', array(':param' => array(1,2,3), ':size' => 3))
 *
 * @param $query
 * @param $params
 */
function pdo_query($query, $params = array()){

    if(!$query)
        trigger_error('Could not query nothing');

    // Lets get our IN fields first
    $in_fields = array();
    foreach($params as $field => $value){
        if(is_array($value)){
            for($i=0,$size=sizeof($value);$i<$size;$i++)
                $in_array[] = $field.$i;

            $query = str_replace($field, "(".implode(',', $in_array).")", $query); // Lets replace the position in the query string with the full version
            $in_fields[$field] = $value; // Lets add this field to an array for use later
            unset($params[$field]); // Lets unset so we don't bind the param later down the line
        }
    }

    $query_obj = $this->pdo_link->prepare($query);
    $query_obj->setFetchMode(PDO::FETCH_ASSOC);

    // Now lets bind normal params.
    foreach($params as $field => $value) $query_obj->bindValue($field, $value);

    // Now lets bind the IN params
    foreach($in_fields as $field => $value){
        for($i=0,$size=sizeof($value);$i<$size;$i++)
            $query_obj->bindValue($field.$i, $value[$i]); // Both the named param index and this index are based off the array index which has not changed...hopefully
    }

    $query_obj->execute();

    if($query_obj->rowCount() <= 0)
        return null;

    return $query_obj;
}

它仍然未经测试，但逻辑似乎是存在的。

经过一些测试，我发现:

PDO不喜欢’。’(如果你问我的话，我觉得这有点蠢) bindParam是错误函数，bindValue是正确函数。

稍微编辑一下施纳勒的代码

<?php
$ids     = array(1, 2, 3, 7, 8, 9);
$inQuery = implode(',', array_fill(0, count($ids)-1, '?'));

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

foreach ($ids as $k => $id)
    $stmt->bindValue(($k+1), $id);

$stmt->execute();
?>

//implode(',', array_fill(0, count($ids)-1), '?')); 
//'?' this should be inside the array_fill
//$stmt->bindValue(($k+1), $in); 
// instead of $in, it should be $id

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);