某些数据库条目被忽略

Question

这件事让我很困惑，我有一个包含各种条目的数据库，对于一个特定的条目名称 415（也恰好是最后一个，当前在数据库中），它被忽略了并视为不存在。

这是我的代码：

/* database section start */
    $mysqli = new mysqli("localhost","user","pass","dbname");

    if (mysqli_connect_errno()) {
        printf("Connect failed: %s\n", mysqli_connect_error());
        exit();
    }
/* database section end */

// Choose Relevant Products, and turn them into an array
$item_array = array(
'417',
'415',
'446'
);

//implode items, turn into string
$item_implode = join("','", $item_array);

//declare an overall array for result
$product = array();

$result = $mysqli->query("SELECT Name, WebsitePrice as price from products where Name IN ('$item_implode') ORDER BY FIELD (Name, '$item_implode');");

while($row = $result->fetch_assoc()) {

    $product_name = $row['Name'];
    // find all keys in $item_array which value is the products
        $keys = array_keys($item_array, $product_name);
    foreach ($keys as $key) {

        // add values for these keys
        $product[$key + 1]["Name"] = $row['Name'];
        $product[$key + 1]["price"] = $row['price'];
    }
}

// test print all avaialable database values
for ($i=1; $i <= count($product)+2; $i++) { 
    echo $product[$i]["Name"] . " - "; //line 46
    echo $product[$i]["price"] . "<br/>"; //line 47
}

我的输出：

417 - 2588.26

Notice: Undefined offset: 2 in /home/saleturbo/public_html/lifetime-new6.php on line 46 - Notice: Undefined offset: 2 in /home/saleturbo/public_html/lifetime-new6.php on line 47

446 - 1654.39

这是 products table 的相关数据库截图：

如您所见，415 条目具有值，其构造与其他条目一样。

Answer 1

它可能有 leading/trailing space

while($row = $result->fetch_assoc()) { 
    $product_name = trim($row['Name']); 
    //rest of the code..
}

某些数据库条目被忽略

Certain DB entry gets ignored

php

mysql

database

mysqli

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