使用 php oops 從 sql 數據庫中選擇表名 [重復]

Question

這個問題在這里已經有了答案：

使用 MySQLi 列出數據庫中的所有表5答案

51 分鍾前關閉。

我正在嘗試從 sql 數據庫中獲取表名它應該 select 並從數據庫中返回選定的表請查看代碼為什么這會返回數據庫中不存在的記錄以及為什么返回 62 ZA3CBC3F9D0CE2F2C19CZDE1 提供的62 ZA3CBC3F9D0CE2F2C19CZE1領域..............................................

public function DomainSearch($domain)
{
    $array = array();
    $query = "SELECT '".$domain."' FROM INFORMATION_SCHEMA.TABLES";
    $result = mysqli_query($this->conn, $query);
    while ($row = mysqli_fetch_assoc($result)) {
        $array[] = $row;
    }
    echo "<pre>";
    print_r($array);
    echo "<pre>";
    // $result = mysqli_num_rows($result);
    

}
}

$domain = "example_com";

$test = new DatabaseConnection();
$test->DomainSearch($domain);

結果

Array
(
    [0] => Array
        (
            [example_com] => example_com
        )

[1] => Array
    (
        [example_com] => example_com
    )

[2] => Array
    (
        [example_com] => example_com
    )

[3] => Array
    (
        [example_com] => example_com
    )

[4] => Array
    (
        [example_com] => example_com
    )

[5] => Array
    (
        [example_com] => example_com
    )

[6] => Array
    (
        [example_com] => example_com
    )

[7] => Array
    (
        [example_com] => example_com
    )

[8] => Array
    (
        [example_com] => example_com
    )

[9] => Array
    (
        [example_com] => example_com
    )

[10] => Array
    (
        [example_com] => example_com
    )

[11] => Array
    (
        [example_com] => example_com
    )

[12] => Array
    (
        [example_com] => example_com
    )

[13] => Array
    (
        [example_com] => example_com
    )

[14] => Array
    (
        [example_com] => example_com
    )

[15] => Array
    (
        [example_com] => example_com
    )

[16] => Array
    (
        [example_com] => example_com
    )

[17] => Array
    (
        [example_com] => example_com
    )

[18] => Array
    (
        [example_com] => example_com
    )

[19] => Array
    (
        [example_com] => example_com
    )

[20] => Array
    (
        [example_com] => example_com
    )

[21] => Array
    (
        [example_com] => example_com
    )

[22] => Array
    (
        [example_com] => example_com
    )

[23] => Array
    (
        [example_com] => example_com
    )

[24] => Array
    (
        [example_com] => example_com
    )

[25] => Array
    (
        [example_com] => example_com
    )

[26] => Array
    (
        [example_com] => example_com
    )

[27] => Array
    (
        [example_com] => example_com
    )

[28] => Array
    (
        [example_com] => example_com
    )

[29] => Array
    (
        [example_com] => example_com
    )

[30] => Array
    (
        [example_com] => example_com
    )

[31] => Array
    (
        [example_com] => example_com
    )

[32] => Array
    (
        [example_com] => example_com
    )

[33] => Array
    (
        [example_com] => example_com
    )

[34] => Array
    (
        [example_com] => example_com
    )

[35] => Array
    (
        [example_com] => example_com
    )

[36] => Array
    (
        [example_com] => example_com
    )

[37] => Array
    (
        [example_com] => example_com
    )

[38] => Array
    (
        [example_com] => example_com
    )

[39] => Array
    (
        [example_com] => example_com
    )

[40] => Array
    (
        [example_com] => example_com
    )

[41] => Array
    (
        [example_com] => example_com
    )

[42] => Array
    (
        [example_com] => example_com
    )

[43] => Array
    (
        [example_com] => example_com
    )

[44] => Array
    (
        [example_com] => example_com
    )

[45] => Array
    (
        [example_com] => example_com
    )

[46] => Array
    (
        [example_com] => example_com
    )

[47] => Array
    (
        [example_com] => example_com
    )

[48] => Array
    (
        [example_com] => example_com
    )

[49] => Array
    (
        [example_com] => example_com
    )

[50] => Array
    (
        [example_com] => example_com
    )

[51] => Array
    (
        [example_com] => example_com
    )

[52] => Array
    (
        [example_com] => example_com
    )

[53] => Array
    (
        [example_com] => example_com
    )

[54] => Array
    (
        [example_com] => example_com
    )

[55] => Array
    (
        [example_com] => example_com
    )

[56] => Array
    (
        [example_com] => example_com
    )

[57] => Array
    (
        [example_com] => example_com
    )

[58] => Array
    (
        [example_com] => example_com
    )

[59] => Array
    (
        [example_com] => example_com
    )

[60] => Array
    (
        [example_com] => example_com
    )

[61] => Array
    (
        [example_com] => example_com
    )

[62] => Array
    (
        [example_com] => example_com
    )

)

Answer 1

INFORMATION_SCHEMA.TABLES 中沒有名為“example_com”的列。您實際上所做的是 select 為該表中的所有記錄提供字符串“example_com”，這沒有任何意義。

我想您正在尋找包含搜索詞的表格。

使用以下查詢都很好，但后一種查詢將允許您搜索當前數據庫的邊界......但是，它要求您的 MySQL 用戶具有適當的權限。

好的，首先是簡單的方法：

SHOW tables like '%example_com%'

這將已經在您當前的數據庫中找到表。 下一個查詢將做同樣的事情：

SELECT TABLE_NAME 
FROM INFORMATION_SCHEMA.TABLES 
WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME LIKE '%example_com%'

但它實際上可以讓你在其他數據庫中找到表。 只需從查詢中刪除部分TABLE_SCHEMA = DATABASE() （您可能希望從表中選擇更多字段）