Question

我知道如何将PHP变量逐个传递给JavaScript变量，但是现在我希望在For循环中传递一堆变量而我只是卡住了。

<?php
        $m = new MongoClient();
        $db = $m->data_from_tweeter;
        $collection = $db->output;
        $cursor = $collection->find();
        foreach($cursor as $document){
            echo $document['place'] ;
            echo $document['fir'];
            echo $document['sec'];
        }
?>

我想将'place'存储为String变量，'fir'和'sec'作为两个Num变量，并使它们看起来像：

var num_1 {
    some_place : some_fir,
    some_place : some_fir,
    some_place : some_fir,
    ....
}

和

var num_2 {
    some_place : some_sec,
    some_place : some_sec,
    some_place : some_sec,
    ....
}

我该怎么做？提前致谢！

Answer 1

如果$ document ['fir']和$ document ['sec']是数组。你可以这样做

<?php
$m = new MongoClient();
$db = $m->data_from_tweeter;
$collection = $db->output;
$cursor = $collection->find();
$num1=array();
$num2=array();
foreach($cursor as $document){
    echo $document['place'] ;
    $num1 = json_encode ($document['fir']);
    $num2 = json_encode ($document['sec']);
}
?>

您可以将JSON字符串用作javascript的对象

var num_1  = <?php echo $num1;?>
var num_2  = <?php echo $num2;?>

Answer 2

以下代码段可能会帮助您入门：

$num_1 = "var num_1 = {\n";
$num_2 = "var num_2 = {\n";
foreach ($cursor as $document) {
        $num_1 .= "    {$document['place']} : {$document['fir']},\n";
        $num_2 .= "    {$document['place']} : {$document['sec']},\n";
}  
$num_1 .= "};\n";
$num_2 .= "};\n";

echo $num_1;
echo $num_2;

在For循环中将PHP变量存储到JavaScript变量中

2 个答案: