对于带有转义函数的MySQLi:

$ids = array_map(function($a) use($mysqli) { 
    return is_string($a) ? "'".$mysqli->real_escape_string($a)."'" : $a;
  }, $ids);
$ids = join(',', $ids);  
$result = $mysqli->query("SELECT * FROM galleries WHERE id IN ($ids)");

对于带准备语句的PDO:

$qmarks = implode(',', array_fill(0, count($ids), '?'));
$sth = $dbh->prepare("SELECT * FROM galleries WHERE id IN ($qmarks)");
$sth->execute($ids);

再举一个例子:

$galleryIds = [1, '2', 'Vitruvian Man'];
$ids = array_filter($galleryIds, function($n){return (is_numeric($n));});
$ids = implode(', ', $ids);

$sql = "SELECT * FROM galleries WHERE id IN ({$ids})";
// output: 'SELECT * FROM galleries WHERE id IN (1, 2)'

$statement = $pdo->prepare($sql);
$statement->execute();

所有交易所:

$query = "SELECT * FROM `$table` WHERE `$column` IN(".implode(',',$array).")";

字符串:

$query = "SELECT * FROM `$table` WHERE `$column` IN('".implode("','",$array)."')";

对于带有转义函数的MySQLi:

$ids = array_map(function($a) use($mysqli) { 
    return is_string($a) ? "'".$mysqli->real_escape_string($a)."'" : $a;
  }, $ids);
$ids = join(',', $ids);  
$result = $mysqli->query("SELECT * FROM galleries WHERE id IN ($ids)");

对于带准备语句的PDO:

$qmarks = implode(',', array_fill(0, count($ids), '?'));
$sth = $dbh->prepare("SELECT * FROM galleries WHERE id IN ($qmarks)");
$sth->execute($ids);

小心!此答案包含一个严重的SQL注入漏洞。不要使用这里给出的代码示例，除非确保任何外部输入都被清除。

$ids = join("','",$galleries);   
$sql = "SELECT * FROM galleries WHERE id IN ('$ids')";

如果正确筛选输入数组，我们可以使用这个"WHERE id IN"子句。就像这样:

$galleries = array();

foreach ($_REQUEST['gallery_id'] as $key => $val) {
    $galleries[$key] = filter_var($val, FILTER_SANITIZE_NUMBER_INT);
}

如下面的例子所示:

$galleryIds = implode(',', $galleries);

也就是说，现在你应该安全地使用$query = "SELECT * FROM galleries WHERE id IN ({$galleryIds})";