用数组提供准备语句

Question

我可以在Postgres中使用预准备语句来添加多个值吗？当我看到事物被添加到array($val)准备好的声明中时，我想到应该能够提供一系列值放在我的表中。这是疯狂的不正确？当我尝试时，我在我的db表中看到只有Array。我不知道它是否是一个实际的阵列，但我猜测，只是这个词，因为这个列是一个简单的character variable。

$tag = array('item1', 'item2', 'item3'); 

// Prepare a query for execution 
$result = pg_prepare($dbconn, "my_query", "INSERT INTO $table ($column) VALUES ($1)"); 

// Execute the prepared query. Note that it is not necessary to escape 
// the string "Joe's Widgets" in any way 
$result = pg_execute($dbconn, "my_query", array("$tag")); 

否则，为什么一个值作为数组提供？

Answer 1

你可以尝试序列化：

$tag = array('item1', 'item2', 'item3'); 
$tag = serialize($tag); 
// Prepare a query for execution 
$result = pg_prepare($dbconn, "my_query", "INSERT INTO $table ($column) VALUES ($1)"); 

// Execute the prepared query. Note that it is not necessary to escape 
// the string "Joe's Widgets" in any way 
$result = pg_execute($dbconn, "my_query", $tag); 

然后，当你想从数据库得到它作为一个PHP数组，反序列化它。

Answer 2

不，这不是，你插入的文本数组...如果$列的类型是文本你的代码应该阅读

$tag = array('item1', 'item2', 'item3'); 

// Prepare a query for execution 
$result = pg_prepare($dbconn, "my_query", "INSERT INTO $table ($column) VALUES ($1)"); 

// Execute the prepared query. Note that it is not necessary to escape 
// the string "Joe's Widgets" in any way 
foreach($tag as $i) 
    $result = pg_execute($dbconn, "my_query", array($i)); 
/// alternatively you could try this if you really wanna insert a text as array of text without using text[] type - uncomment line below and comment the 2 above 
// $result = pg_execute($dbconn, "my_query", array(json_encode($tag))); 

，或者如果你定义$列文本[]这是PostgreSQL的法律作为数组代码应该读取

$tag = array('item1', 'item2', 'item3'); 

// Prepare a query for execution 
$result = pg_prepare($dbconn, "my_query", "INSERT INTO $table ($column) VALUES ($1)"); 

// Execute the prepared query. Note that it is not necessary to escape 
// the string "Joe's Widgets" in any way 
$tmp = json_encode($tag); 
$tmp[0] = '{'; 
$tmp[strlen($tmp) - 1] = '}'; 
$result = pg_execute($dbconn, "my_query", array($tmp));