使用条件从Php数组中提取
我想根据“RouterName”从PHP数组中提取数据组。 最后,我将得到4个大阵列(ArrDeviceA、ArrDeviceB等) 我不想使用foreach和循环每一行并将其放入单独的数组中。此外,有些数组可能包含3行以上的行。行数不是恒定的 PHP中是否有查询数组的函数?使用条件从Php数组中提取,php,arrays,extract,Php,Arrays,Extract,我想根据“RouterName”从PHP数组中提取数据组。 最后,我将得到4个大阵列(ArrDeviceA、ArrDeviceB等) 我不想使用foreach和循环每一行并将其放入单独的数组中。此外,有些数组可能包含3行以上的行。行数不是恒定的 PHP中是否有查询数组的函数? php数组的原始数据如下: Array ( [0] => Array ( [RouterName] => DeviceA [Refere
php数组的原始数据如下:
Array
(
[0] => Array
(
[RouterName] => DeviceA
[Reference] => R2a
[AverageRSSI] => -36.00
[AverageQuality] => 63.00
[Date_Time] => 12-June-2010
)
[1] => Array
(
[RouterName] => DeviceA
[Reference] => R2a
[AverageRSSI] => -51.03
[AverageQuality] => 47.97
[Date_Time] => 11-June-2010
)
[2] => Array
(
[RouterName] => DeviceA
[Reference] => R2a
[AverageRSSI] => -53.63
[AverageQuality] => 45.37
[Date_Time] => 10-June-2010
)
[3] => Array
(
[RouterName] => DeviceB
[Reference] => R2
[AverageRSSI] => -38.19
[AverageQuality] => 60.81
[Date_Time] => 12-June-2010
)
[4] => Array
(
[RouterName] => DeviceB
[Reference] => R2
[AverageRSSI] => -38.64
[AverageQuality] => 60.36
[Date_Time] => 11-June-2010
)
[5] => Array
(
[RouterName] => DeviceB
[Reference] => R2
[AverageRSSI] => -38.67
[AverageQuality] => 60.33
[Date_Time] => 10-June-2010
)
[6] => Array
(
[RouterName] => DeviceC
[Reference] => SCN1010
[AverageRSSI] => -69.12
[AverageQuality] => 29.88
[Date_Time] => 12-June-2010
)
[7] => Array
(
[RouterName] => DeviceC
[Reference] => SCN1010
[AverageRSSI] => -70.99
[AverageQuality] => 28.01
[Date_Time] => 11-June-2010
)
[8] => Array
(
[RouterName] => DeviceC
[Reference] => SCN1010
[AverageRSSI] => -71.52
[AverageQuality] => 27.48
[Date_Time] => 10-June-2010
)
[9] => Array
(
[RouterName] => DeviceD
[Reference] => SCN1020
[AverageRSSI] => -62.48
[AverageQuality] => 36.52
[Date_Time] => 12-June-2010
)
[10] => Array
(
[RouterName] => DeviceD
[Reference] => SCN1020
[AverageRSSI] => -34.60
[AverageQuality] => 64.40
[Date_Time] => 11-June-2010
)
[11] => Array
(
[RouterName] => DeviceD
[Reference] => SCN1020
[AverageRSSI] => 0.00
[AverageQuality] => 99.00
[Date_Time] => 10-June-2010
)
)
PHP中是否有查询数组的函数?
在PHP中,您可以使用函数In_array()
()检查是否存在某个键,以及array_search()
(),该函数与In_array()
函数几乎相同,但返回数组的索引值而不是布尔值
它们不会作为mysql\u query()
函数进行查询,但您可以这样做:
function array_query($array,$what){
if(in_array($what, $array)){
return $array[array_search($what, $array)];
}
return false;
}
我希望这对你有用
编辑:我发现了一个array\u search()
类似于多维数组(您的示例),代码在上面,您只需将array\u search($what,$array)
函数与递归数组搜索($array,$what)
函数交换即可:
function recursiveArraySearch($haystack, $needle, $index = null)
{
$aIt = new RecursiveArrayIterator($haystack);
$it = new RecursiveIteratorIterator($aIt);
while($it->valid())
{
if (((isset($index) AND ($it->key() == $index)) OR (!isset($index))) AND ($it->current() == $needle)) {
return $aIt->key();
}
$it->next();
}
return false;
}
我不想使用foreach和循环每一行并将其放入单独的数组中
为什么??这是4行非常清晰的代码,你甚至可以保存一行。。。保持简单
$indexedByRouterName = array();
foreach ($array as $key => $value) {
$routerName = $value['RouterName'];
$indexedByRouterName[$routerName][] = $value;
}
如果使用[]运算符,则行数未知不是问题 absynthe中的库允许您对PHP数组执行SQL查询。我认为它还不支持GROUPBY子句,但它可能提供搜索数组的其他方法的替代方法