Question

我是symfony的新手，我正在尝试构建一个看起来像这样的数组：

['10'=＆gt; 100，'100'=＆gt; 40，'200'=＆gt; 10，'reis'=＆gt; 1]

数据显然来自我的数据库，所以这是我的查询：

$chances = $conn->fetchAll("SELECT * FROM prices");

这会产生一个包含对象的数组：

[{"id":"1","price":"10","amount":"1000","chance":"0,5"},
{"id":"2","price":"100","amount":"100","chance":"0,2"},
{"id":"3","price":"200","amount":"10","chance":"0,05"},
{"id":"4","price":"reis","amount":"1","chance":"0,005"},
{"id":"5","price":"noprice","amount":"0","chance":"0,245"}]

现在我需要将机会乘以200并填充我的数组，我这样做：

foreach ($chances as $chance){
  $p = $chance['price'];
  $c = (200 * $chance['chance']);
  $chancesArr[] = array($p => $c);
}

但由于某种原因，我总是得到0

任何人都知道为什么乘法不起作用？

我有另一个小问题$ chancesArr是一个多维数组，但它应该是1个数组，键为$ p，值为$ c

我的结果：

[{ “10”：0}，{ “100”：0}，{ “200”：0}，{ “现实”：0}]

我的目标：

['10'=＆gt; 100，'100'=＆gt; 40，'200'=＆gt; 10，'reis'=＆gt; 1]

非常感谢任何帮助

非常感谢提前！

Answer 1

我认为这是因为数字上的逗号，尝试按点替换逗号

$chances = '[{"id":"1","price":"10","amount":"1000","chance":"0,5"},
{"id":"2","price":"100","amount":"100","chance":"0,2"},
{"id":"3","price":"200","amount":"10","chance":"0,05"},
{"id":"4","price":"reis","amount":"1","chance":"0,005"},
{"id":"5","price":"noprice","amount":"0","chance":"0,245"}]';

$chances = json_decode($chances, true);

foreach ($chances as $chance){
    $p = $chance['price'];
    $c = 200 * str_replace(',', '.', $chance['chance']);
    $chancesArr[$p] = $c;
}

echo json_encode($chancesArr);

输出：{"10":100,"100":40,"200":10,"reis":1,"noprice":49}

symfony php从查询

1 个答案: