php foreach 或 in_array 只取數組的最后一個元素

Question

請我有大文件的行，我需要在另一個文件中找到與值匹配的文件。

我將txt文件放入數組。

AS11251
AS13379
AS135377
...
AS8972

然后我使用大文件生成器逐行讀取。 每行看起來像這樣（除了前幾行）： * 1.0.6.0/24 137.164.16.84 0 0 0 2152 6939 4826 38803 i

然后我將這些行一一取出，將其分解並將其與該數組與 txt 中的值進行比較。 但我只得到與最后一個元素（AS8972）匹配的行。 我試過 foreach，我試過 in_array 但都失敗了。 唯一有效的是一堆 if/elseif 與該 txt 中的每個值。

這是我的代碼：

//first part - txt file into the array
$checklist = function() {
    $as_checklist = fopen(__DIR__ . '/as_checklist.txt', 'r');

    if (!$as_checklist)
        die('file does not exist or cannot be opened');

    while (($line_as = fgets($as_checklist)) !== false) {
        yield $line_as;
    }

    fclose($as_checklist);
};

$checklist_array = array();
$i = 0;

foreach ($checklist() as $line_as) {

            $checklist_array[$i] = $line_as;
            $i++;
}
//end of first part


//second part - generator for huge file, reading line by line
$fileData = function() {
    $file = fopen(__DIR__ . '/oix-full-snapshot-latest.dat', 'r');

    if (!$file)
        die('file does not exist or cannot be opened');

    while (($line = fgets($file)) !== false) {
        yield $line;
    }

    fclose($file);
};
//end of second part


unlink('clear_lines.txt');


//third part, checking line by line if there is a match with array from first part
foreach ($fileData() as $nextline) {
    set_time_limit(300);
        if (substr($nextline, 0, 1) == '*'){
            $nextline = preg_replace("/[[:blank:]]+/"," ", $nextline);
            $line_array = explode(' ', $nextline);
            $count = count($line_array);
            $current_AS = "AS" . $line_array[$count-2];

                if (in_array($current_AS, $checklist_array)){
                                //echo $current_AS."<br>";
                                //echo $line_array[1]." - ".$line_array[2]."<br><br>";
                                $current_content = $current_AS . " " . $line_array[1] . "\n";
                                file_put_contents('clear_lines.txt',$current_content, FILE_APPEND);
                            }


                }
            }

感謝您的建議，我想這是那個foreach的一些不好的用法，但無法弄清楚

Answer 1

最后一行，分解：

foreach($data1 as $s) {
  foreach($data2 as $d) {
   // str_replace('AS','',$s) strips out the 'AS' from the search string
   // preg_split('/\s+/', $d) returns an array of all the elements of the big data line split by groups of spaces
   // in_array() checks if the search string exists in the big data line array
   if (in_array(str_replace('AS','',$s), preg_split('/\s+/', $d))) {
        $found[]=$d;
   }
 }
}

代碼，在上下文中

<?php

$data1 = <<<EOT
AS11251
AS13379
AS135377
AS8972
EOT;

$data2 = <<<EOT
*  5.35.224.0/24      212.66.96.126            0      0      0 20912 3257 1299 20773 20773 20773 20773 20773 8972 i 
*  1.0.0.0/24         206.24.210.80            0      0      0 3561 209 3356 13335 i
EOT;

$data1 = explode("\n", $data1);
$data2 = explode("\n", $data2);

$found = [];
foreach($data1 as $s) foreach($data2 as $d) if (in_array(str_replace('AS','',$s), preg_split('/\s+/', $d))) $found[]=$d;

print_r($found);

看看它在行動：
示例： https : //www.tehplayground.com/uldljTx1dQpoSwdK