从SQL数据库提取值（整数）

Question

我在SQL数据库中有一个整数，我试图在php中找到该整数的值。 整数是照片喜欢的数量。这是我的查询：

$result = query("SELECT likes FROM NSPhotos WHERE IdPhoto='%s' LIMIT 1", $imageID); 

如何从“$结果”中得到整数值？

Answer 1

假设你使用MySQL，你会做这样的事情：

// Establish a connection to the database 
$mysqli = new mysql('host', 'user', 'pass', 'database'); 

$query = "SELECT likes FROM NSPhotos WHERE IdPhoto = ".$imageID." LIMIT 1"; 
$result= $mysqli -> query($query); 
$num = $mysqli -> num_rows; 

if($num > 0){ 

    // Fetch the result from the database 
    $row = $result -> fetch_object(); 

    // Print the result or you could put it in a variable for use later. 
    echo 'Likes: '.$row -> likes; 
    $like_count = $row -> likes; 

}else{ 
    echo 'Photo not found.'; 

}