我的数据位于返回值的第二层中，我正在尝试访问各个元素。 数组 （ [成功] => 1 [返回] => 数组 （ [0] => 数组我尝试了['return']，因为它是其中的关键，是我需要的，但得到了相同的错误或明显更糟。
错误：
Array to string conversion in orders.php on line 10
法典：
<?php
$id = $argv[1]; //variable for inbound
require_once('phpPlay.php');
$result = api_query("mytrades", array("marketid" => $id));
foreach( $result as $x) {
echo $x;
}
?>
数据前 5 行：
Array
(
[success] => 1
[return] => Array
(
[0] => Array
(
[tradeid] => 74038377
[tradetype] => Sell
[datetime] => 2014-11-12 16:05:32
[tradeprice] => 0.00675000
[quantity] => 22.18670000
[fee] => -0.00007488
[total] => 0.14976023
[initiate_ordertype] => Buy
[order_id] => 197009493
)
[1] => Array
(
[tradeid] => 73687280
[tradetype] => Buy
[datetime] => 2014-11-09 03:38:13
[tradeprice] => 0.00816988
[quantity] => 0.00100000
[fee] => 0.00000002
[total] => 0.00000817
[initiate_ordertype] => Buy
[order_id] => 194824864
)
[2] => Array
(
[tradeid] => 73684313
[tradetype] => Sell
[datetime] => 2014-11-09 02:57:41
[tradeprice] => 0.00808034
[quantity] => 0.00100000
[fee] => 0.00000000
[total] => 0.00000808
[initiate_ordertype] => Buy
[order_id] => 194803992
)
[3] => Array
(
[tradeid] => 73653019
[tradetype] => Sell
[datetime] => 2014-11-08 17:53:12
[tradeprice] => 0.00793991
[quantity] => 0.00010000
[fee] => 0.00000000
[total] => 0.00000079
[initiate_ordertype] => Buy
[order_id] => 194559503
)
[4] => Array
(
[tradeid] => 73652717
[tradetype] => Sell
[datetime] => 2014-11-08 17:50:13
[tradeprice] => 0.00793989
[quantity] => 0.00100000
[fee] => 0.00000002
[total] => 0.00000794
[initiate_ordertype] => Sell
[order_id] => 194559596
)
。
问题是，对于上面代码中的 echo $x 语句，$x 是一个数组，而不是一个字符串。
echo函数需要一个字符串，所以你得到的错误是因为 PHP 自动尝试将传递给echo的参数转换为字符串，但它失败了，因为你传递了一个数组。
试试这个：
if (isset($result['return'])) {
foreach($result['return'] as $result_item) {
echo(var_export($result_item, true));
}
} else {
echo 'No results';
}