PHP PDO發布字符串列表IN Where子句

Question

我幾乎可以使用以下代碼，但不熟悉如何以數組形式（如測試）將列表從最終用戶發布到$ ids。 最終用戶將以“ 3,5,7,8 ...”的形式發送給我一個列表

轉換為POST語句時，如何模擬“ $ ids = array（1,2,3）”？

<?php
//1. Create a database connection

require_once('config.php');
    $mysql_host = DB_HOST;
    $mysql_database = DB_NAME;
    $mysql_username = DB_USER;
    $mysql_password = DB_PASS;

$ids = $_POST["idsvar"]; //Doesn't return values
//$ids =  array(1,2,3); //This does work when used for testing purposes

$inQuery = implode(',', array_fill(0, count($ids), '?'));


try {
    $conn = new PDO("mysql:host=$mysql_host; dbname=$mysql_database", $mysql_username, $mysql_password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $conn->exec("SET CHARACTER SET utf8");      // Sets encoding UTF-8

    //2. Perform database query if Connected Successfully
    $stm = $conn ->prepare(
    'SELECT `schema`.`table`.`column1` AS `DiffNameA`,
    `schema`.`table`.`column2` AS `DiffNameB`
     FROM `schema`.`table`
     WHERE id IN(' . $inQuery . ')');

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

$field = $stm->fetchAll();

foreach ($field as $row) {
print $row["DiffNameA"] . "|" .$row["DiffNameB"] ."\n\r"; //extra comma so can have notes hidden area
}   

  $conn = null;        // Disconnect    
    }
catch(PDOException $e)
    {
    echo "Connection failed: " . $e->getMessage().'<br />';
    file_put_contents('PDOErrors.txt', $e->getMessage(), FILE_APPEND);
    }
?>

感謝您的任何幫助。

================================================== =============

如果它可以幫助任何人，這是完整的腳本：

<?php
//1. Create a database connection

require_once('config.php');
    $mysql_host = DB_HOST;
    $mysql_database = DB_NAME;
    $mysql_username = DB_USER;
    $mysql_password = DB_PASS;



$ids = explode(',', $_POST["idsvar"]);
$inQuery = implode(',', array_fill(0, count($ids), '?'));


try {


    $conn = new PDO("mysql:host=$mysql_host; dbname=$mysql_database", $mysql_username, $mysql_password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $conn->exec("SET CHARACTER SET utf8");      // Sets encoding UTF-8

    //2. Perform database query if Connected Successfully
    $stm = $conn ->prepare(
    'SELECT `schema`.`table`.`column1` AS `DiffNameA`,
    `schema`.`table`.`column2` AS `DiffNameB`
     FROM `schema`.`table`
     WHERE id IN(' . $inQuery . ')');

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

$field = $stm->fetchAll();

foreach ($field as $row) {
print $row["DiffNameA"] . "|" .$row["DiffNameB"] ."\n\r"; //extra comma so can have notes hidden area
}


  $conn = null;        // Disconnect    
    }
catch(PDOException $e)
    {
    echo "Connection failed: " . $e->getMessage().'<br />';
    file_put_contents('PDOErrors.txt', $e->getMessage(), FILE_APPEND);
    }
?>

Answer 1

您的$_POST["idsvar"]是字符串，而不是數組。 使用explode將其拆分為每個逗號處的數組。

$test = explode(',', '1,2,3');

演示： https : //eval.in/603133

在您的情況下：

$ids = explode(',', $_POST["idsvar"]);

count($ids)在您的靜態示例中有效，因為您將$ids定義為數組（ $ids = array(1,2,3) ）。

或者，如果您也想驗證輸入，則可以使用正則表達式。

(\d+)(?:,|\z)

https://regex101.com/r/dI5fN4/1