我正在开发一个jQuery拖放游戏，并从有效的csv文件中提取信息，例如图像，年份和文本：

$rows = file('Book1.csv');
$len = count($rows);
$rand = array();
while (count($rand) < 5) {
    $r = rand(0,$len);
    if (!in_array($r,$rand)) {
        $rand[] = $r;
    }
}
echo 'var cardDeck = [';
foreach ($rand as $r) {
    $csv = $rows[$r];
    $data = str_getcsv($csv);
    echo "{\n";
    echo "'image':'".$data[1]."',\n"; 
    echo "'year':'".$data[0]."',\n"; 
    echo "'hint':'".$data[3]."',\n"; 
    echo "'caption':'".$data[2]."'"; 
    echo "\n},\n";
}
echo "];";

但是我遇到的问题是，我试图使用for循环创建5个新数组，以增加变量名，并将Year值设置为已经从csv中提取的数组

foreach ($rand as $r) {
    $csv = $rows[$r];
    $data = str_getcsv($csv);
    for ($i = 1; $i < 5; $i++) {
        $varToEcho = "correct_dropzone$i"; // become correct_dropzone1,correct_dropzone2,etc.
        echo "var ".$varToEcho." = new Array('".$data[0]."');\n"; 
    }   
}

我在寻找什么

var correct_dropzone1 = new Array('1845');
var correct_dropzone2 = new Array('1835');
var correct_dropzone3 = new Array('1586');
var correct_dropzone4 = new Array('1912');
var correct_dropzone5 = new Array('1969');

但是我的输出是：

var correct_dropzone1 = new Array('1845');
var correct_dropzone2 = new Array('1845');
var correct_dropzone3 = new Array('1845');
var correct_dropzone4 = new Array('1845');
var correct_dropzone1 = new Array('1835');
var correct_dropzone2 = new Array('1835');
var correct_dropzone3 = new Array('1835');
var correct_dropzone4 = new Array('1835');
var correct_dropzone1 = new Array('1586');
var correct_dropzone2 = new Array('1586');
var correct_dropzone3 = new Array('1586');
var correct_dropzone4 = new Array('1586');
var correct_dropzone1 = new Array('1912');
var correct_dropzone2 = new Array('1912');
var correct_dropzone3 = new Array('1912');
var correct_dropzone4 = new Array('1912');
var correct_dropzone1 = new Array('1822');
var correct_dropzone2 = new Array('1822');
var correct_dropzone3 = new Array('1822');
var correct_dropzone4 = new Array('1822');