Question

我有一个多维数组，我想循环并打印存储在数组中的值。这是我期待实现的最终结果

{ "lat": 52.4469601, "lon": -1.93685532},
{ "lat": 52.44332417, "lon": -1.9426918},
{ "lat": 52.43987106, "lon": -1.9329071}

我如何打印这样的值？目前这就是我打印整个阵列的方式：

$enc = 'NTIuNDQ2OTYwMSwtMS45MzY4NTUzMnw1Mi40NDMzMjQxNywtMS45NDI2OTE4fDUyLjQzOTg3MTA2LC0xLjkzMjkwNzF8NTIuNDQ1NDk1MywtMS45MjU4MjYwN3w';

$decoded = base64_decode($enc);

$trim = trim($decoded, '|');
$data = explode('|', $decoded);
$out = array();
$step = 0;
$last = count($data);
$last--;

foreach( $data as $key => $item ) {
    foreach (explode(',', $item) as $value) {
        $out[$key][] = $value;
    }
}

echo "<pre>";
print_r( $out );
echo "</pre>";

输出如下：

Array
(
    [0] => Array
        (
            [0] => 52.4469601
            [1] => -1.93685532
        )

    [1] => Array
        (
            [0] => 52.44332417
            [1] => -1.9426918
        )

    [2] => Array
        (
            [0] => 52.43987106
            [1] => -1.9329071
        )

    [3] => Array
        (
            [0] => 52.4454953
            [1] => -1.92582607
        )

)

Answer 1

如果您的数据始终使用“lat”和“lon”对导出，则可以执行以下操作：

foreach( $data as $key => $item ) {
    $lat = true;
    foreach (explode(',', $item) as $value) {
        if($lat == true){
            $out[$key]["lat"] = $value;
            $lat = false;
        } else {
            $out[$key]["lon"] = $value;
        }
    }
}

Answer 2

使用流方法执行此操作的另一种方法：

$enc = 'NTIuNDQ2OTYwMSwtMS45MzY4NTUzMnw1Mi40NDMzMjQxNywtMS45NDI2OTE4fDUyLjQzOTg3MTA2LC0xLjkzMjkwNzF8NTIuNDQ1NDk1MywtMS45MjU4MjYwN3w';

$handle = fopen("data:text/plain;base64,$enc", 'r');

$res = [];    

while ( false !== $rec = stream_get_line($handle, 0, '|') ) {
     $res[] = array_combine(['lat', 'lon'], str_getcsv($rec));
}

echo json_encode($res);

Answer 3

$enc = 'NTIuNDQ2OTYwMSwtMS45MzY4NTUzMnw1Mi40NDMzMjQxNywtMS45NDI2OTE4fDUyLjQzOTg3MTA2LC0xLjkzMjkwNzF8NTIuNDQ1NDk1MywtMS45MjU4MjYwN3w';

$decodedArr = explode('|', base64_decode($enc));

$latLong = [];
foreach ($decodedArr as $latLongStr) {
    if (!$latLongStr) {
        continue;
    }

    $temp = explode(',', $latLongStr);

    $latLong[] = ['lat' => $temp[0], 'lon' => $temp[1]];
}

echo json_encode($latLong);

输出

[{"lat":"52.4469601","lon":"-1.93685532"},{"lat":"52.44332417","lon":"-1.9426918"},{"lat":"52.43987106","lon":"-1.9329071"},{"lat":"52.4454953","lon":"-1.92582607"}]

循环遍历多维数组和回显值

3 个答案: