將128位序列分解為位

Question

我試圖在PHP中實現一個解析器，該解析器讀取各種大小的二進制文件（例如$ fsize）。 在這些文件中，有重復的16字節序列，我想獨立處理（一次一個16字節序列）。 我設法以以下形式讀取和隔離每個這樣的16字節序列：

處理樣品[2] ...

打印16個樣本字節

$ bit_sequence ='10000000010111001000000001100111011010110110011110100110101000100111011100111111000100000000000010100011010010101001101111101000'

數組：

$ bits =（[0] => 1 [1] => 0 [2] => 0 [3] => 0 [4] => 0 [5] => 0 [6] => 0 [7] = > 0 [8] => 0 [9] => 1 [10] => 0 [11] => 1 [12] => 1 [13] => 1 [14] => 0 [15] => 0 [16] => 1 [17] => 0 [18] => 0 [19] => 0 [20] => 0 [21] => 0 [22] => 0 [23] => 0 [24] ] => 0 [25] => 1 [26] => 1 [27] => 0 [28] => 0 [29] => 1 [30] => 1 [31] => 1 [32] = > 0 [33] => 1 [34] => 1 [35] => 0 [36] => 1 [37] => 0 [38] => 1 [39] => 1 [40] => 0 [41] => 1 [42] => 1 [43] => 0 [44] => 0 [45] => 1 [46] => 1 [47] => 1 [48] => 1 [49] ] => 0 [50] => 1 [51] => 0 [52] => 0 [53] => 1 [54] => 1 [55] => 0 [56] => 1 [57] = > 0 [58] => 1 [59] => 0 [60] => 0 [61] => 0 [62] => 1 [63] => 0 [64] => 0 [65] => 1 [66] => 1 [67] => 1 [68] => 0 [69] => 1 [70] => 1 [71] => 1 [72] => 0 [73] => 0 [74] ] => 1 [75] => 1 [76] => 1 [77] => 1 [78] => 1 [79] => 1 [80] => 0 [81] => 0 [82] = > 0 [83] => 1 [84] => 0 [85] => 0 [86] => 0 [87] => 0 [88] => 0 [89] => 0 [90] => 0 [91] => 0 [92] => 0 [93] => 0 [94] => 0 [95] => 0 [96] => 1 [97] => 0 [98] => 1 [99] ] => 0 [1 00] => 0 [101] => 0 [102] => 1 [103] => 1 [104] => 0 [105] => 1 [106] => 0 [107] => 0 [108] => 1 [109] => 0 [110] => 1 [111] => 0 [112] => 1 [113] => 0 [114] => 0 [115] => 1 [116] => 1 [117] => 0 [118] => 1 [119] => 1 [120] => 1 [121] => 1 [122] => 1 [123] => 0 [124] => 1 [ 125] => 0 [126] => 0 [127] => 0）

我也有一個包含變量的數組，我想將上面的信息存儲到其中...

數組：

$ variables =（[0] => wide_avg_txon [1] => wide_avg [2] => wide_peak_rms [3] => wide_peak [4] => low_pw [5] => low_pp ​​[6] => high_pw [7] = > high_pp [8] =>電池電壓[9] => temperature_spr_flag [10] =>溫度[11] => Alarm_abat [12] => Alarm_amem [13] => Alarm_atmp [14] => Alarm_Alck [15] => Alarm_prx [16] => alarm_arpb [17] => alarm_awrn [18] => alarm_aalr [19] => mask_mbat [20] => mask_mmem [21] => mask_mtmp [22] => mask_mlck [23] => mask_smx [24] ] => mask_mprb [25] => mask_mwrn [26] => mask_malr [27] => sample_rate [28] => avg_period [29] =>幾個月[30] => date_time）

我的目標是找到一種方法來處理整個128位序列，例如具有128個元素的數組，並可以選擇以這種方式提取：

bits [0]->存儲在變量$ wide_avg_txon中（布爾值）

位[1-> 15]->存儲在變量$ wide_avg中（15位無符號整數）

位[16]->存儲在變量$ wide_peak_rms中（布爾值）

位[17-> 31]->存儲在變量$ wide_peak中（15位無符號整數）

位[32-> 39]->存儲在變量$ low_pw中（8位無符號整數）

.... （等等）

位[112-> 127]->存儲在變量$ date_time中（16位無符號整數）

我在php和編程方面還很新...

我不知道這是否是最佳解決方案...但是我設法使用如下代碼將表示1,8或16位二進制序列的字符串存儲到變量中：

$ wide_avg_txon = substr（$ bit_sequence，0,1）;

// wide_avg_txon：1

$ wide_avg ='0'.substr（$ bit_sequence，1,15）;

// wide_avg：0000000001100000

$ wide_peak_rms = substr（$ bit_sequence，16,1）;

// wide_peak_rms：1

$ wide_peak ='0'.substr（$ bit_sequence，17,15）;

// wide_peak：0000000001100100

現在我將需要以某種方式處理這些字符串（代表二進制數字）並以數字方式轉換為十進制數字...

對我發布的解決方案的任何建議都將很有用，歡迎您...

Answer 1

實際上，我設法使用一種非常骯臟的方式打破了128位序列：

$ wide_avg ='0'.substr（$ bit_sequence，1,15）;

$ wide_avg_dec = bindec（$ wide_avg）;

回聲“ wide_avg：”。 $ wide_avg。 ”，以及十進制：“。 $ wide_avg_dec。 “”;

等等...

Answer 2

看來您只是從一個字符串創建一個數組：

function getArrayFromString($string)
{
    $length = strlen($string);
    $ret = array();
    for ($i = 0; $i < $length; $i++)
    {
        $ret[] = $string[$i];
    }
}

但是，聽起來好像您正在使用字節序列之類的標志。 這應該像您所需要的：

define("ADMIN_PRIV", 1); // 1<<1
define("DEV_PRIV", 4); // 1<<3
if ($byte & ADMIN_PRIV)
{
    // this user is admin
}

但是，PHP的整數只有32位長（4個字節），因此這是您可以使用的最多的整數。 因此，我將按字節工作。