将字符串数组拆分为一个或多个空格[重复]

Question

这里的目标是从日志文件中获取文本，纯文本由回车符分隔，每行由不同数量的空格分隔。

将其放入多维空间很容易，但消除空白却不容易。我想有很多混乱的方法可以解决这个问题，但这不是 array_filter() 的原因之一吗？

$alarms = array(
    "1530     1545     Place_4     Fault_1",
    "1617     1622     Place_1     Fault_2",
    "1634     1640     Place_2     Fault_1"
);

foreach ($alarms as $data) {
    $subArr = explode(" ", $data);  
    
    array_filter($subArr);

    print_r($subArr);
    echo "<br /><br />";
}

输出：

Array ( [0] => 1530 [1] => [2] => [3] => [4] => [5] => 1545 [6] => [7] => [8] => [9] => [10] => Place_4 [11] => [12] => [13] => [14] => [15] => Fault_1 ) 

Array ( [0] => 1617 [1] => [2] => [3] => [4] => [5] => 1622 [6] => [7] => [8] => [9] => [10] => Place_1 [11] => [12] => [13] => [14] => [15] => Fault_2 ) 

Array ( [0] => 1634 [1] => [2] => [3] => [4] => [5] => 1640 [6] => [7] => [8] => [9] => [10] => Place_2 [11] => [12] => [13] => [14] => [15] => Fault_1 ) 

希望是：

Array ( [0] => 1530 [1] => 1545 [2] => Place_4 [3] => Fault_1 ) 

Array ( [0] => 1617 [1] => 1622 [2] => Place_1 [3] => Fault_2 ) 

Array ( [0] => 1634 [1] => 1640 [2] => Place_2 [3] => Fault_1 )

不知道出了什么问题。

Answer 1

从手册中，array_filter：

返回值： 返回过滤后的数组。

强调回报。目前您忽略返回值。

Answer 2

而不是

explode(" ",$something)

，试试这个：

$parts = preg_split("/ +/",$something);

这将分割成可变数量的空格。

Answer 3

更新代码

$alarms = array(
    "1530     1545     Place_4     Fault_1",
    "1617     1622     Place_1     Fault_2",
    "1634     1640     Place_2     Fault_1"
);

foreach ($alarms as $data) {
    $subArr = explode(" ", $data);  

    $subArr = array_filter($subArr);

    print_r($subArr);
    echo "<br /><br />";
}