嘿，所以我构建了一个过滤组合列表的脚本，它仅输出不会重复超过 2 次的组合，但它超级慢，这是我的脚本：
<?php
ini_set('max_execution_time', '-1');
ini_set('memory_limit', '-1');
$fileCombo = file("ww.txt", FILE_IGNORE_NEW_LINES);
$output = fopen("workpless.txt", "a") or die("Unable to open file!");
//all domains of the entire list
$domains = array();
//only domains that repeat themself less than 2 times
$less = array();
//takes the combo list explode it to domain names
foreach ($fileCombo as $combo) {
$pieces = explode(":", $combo);
$email = explode("@", $pieces[0]);
//import domains to array
$domains[] = strtolower($email[1]);
}
//count each string in the array
$ac = array_count_values($domains);
//this foreach just filter all the domains that not repeat themself over 2 times
foreach ($ac as $email => $item) {
if($item <= 2) {
$less[] = $email;
}
}
/* this foreach is the one that makes all the trubles,
it takes all the domains that the last foreach filtered
and its runing it 1 by 1 on the entire combo list to get
the actual combo */
foreach ($less as $find) {
$matches = array_filter($fileCombo, function($var) use ($find) { return preg_match("/\b$find\b/i", $var); });
foreach ($matches as $match) {
$data = $match . PHP_EOL;
fwrite($output, $data);
}
}
fclose($output);
?>
伪代码（我能做的最好的）：
file1:
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
array "fileCombo" load file1 into the array
splitting each line by ":" so you will get [0][email protected], [1]password
splitting value [0] by "@" so you will get [0]example, [1]example.com
putting value [1] into new array called "domains"
counting how many duplicates of each domain
putting all the domains that have less than 2 dupes inside new array that called "less"
runing 1 by 1 each domain in "less" array on "fileCombo" array
if "less" value was found inside "fileCombo" array value Than
write the entire line from "fileCombo" into a text file
这个脚本用于每次 2~5M 行的大文件，这就是为什么我需要优化它（当你在上面运行 20k 行时它很快）。
以下应该是适合您的情况的最“简洁”的解决方案。
但是您应该在大文件上测试它（2~5M）：
比方说，
file1.txt[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
$combos = file_get_contents("file1.txt");
preg_match_all("/\b\S+?@(\S+?):\S+?\b/m", $combos, $matches);
$less = array_filter(array_count_values($matches[1]), function ($v){
return $v <= 2;
});
// $matches[0] - is an array of lines
// $matches[1] - is an array of domains in respective positions as lines
$matched_lines = "";
foreach (array_keys($less) as $domain) {
$matched_lines .= $matches[0][array_search($domain, $matches[1])] . PHP_EOL;
}
if ($matched_lines) {
file_put_contents("workpless.txt", $matched_lines, FILE_APPEND);
}
// Now "workpless.txt" contains the following lines:
[email protected]:password
[email protected]:password
更新： 显示该域的所有相关行，但 1M 行文件需要花费 5 秒以上的时间
在 80,000 行（40,000 条独特行）上进行测试 - 2.5 MB
Memory Usage
69,994,816 bytes
70,246,808 bytes (process)
71,827,456 bytes (process peak)
Execution Time
0.54409 seconds
在 1,000,000 行（500,000 条独特行）上进行测试 - 33 MB
Memory Usage
864,805,152 bytes
865,057,144 bytes (process)
866,648,064 bytes (process peak)
Execution Time
8.9173 seconds
我的测试机是 i7-3612QM (CPU Mark 6833) 4GB RAM SSD
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
这是您的新版本:)）
<?php
// System Start Time
define('START_TIME', microtime(true));
// System Start Memory
define('START_MEMORY_USAGE', memory_get_usage());
function show_current_stats() {
?>
<b>Memory Usage</b>
<pre>
<?php print number_format(memory_get_usage() - START_MEMORY_USAGE); ?> bytes
<?php print number_format(memory_get_usage()); ?> bytes (process)
<?php print number_format(memory_get_peak_usage(TRUE)); ?> bytes (process peak)
</pre>
<b>Execution Time</b>
<pre><?php print round((microtime(true) - START_TIME), 5); ?> seconds</pre>
<?php
}
// Script start here
$fileCombo = file("ww.txt", FILE_IGNORE_NEW_LINES);
$output = fopen("workpless.txt", "a") or die("Unable to open file!");
//all domains of the entire list
$domains = array();
//only domains that repeat themself less than 2 times
$less = array();
//let make relateion between domains and its position(keys) in fileCombo
$domains_keys = array();
//takes the combo list explode it to domain names
foreach ($fileCombo as $key => $combo) {
$pieces = explode(":", $combo);
$email = explode("@", $pieces[0]);
//import domains to array
$domains[] = strtolower($email[1]);
// check if domain exists or create new domain in $domains_keys array
if (isset($domains_keys[strtolower($email[1])] )) {
$domains_keys[strtolower($email[1])][] = $key;
} else {
$domains_keys[strtolower($email[1])] = array($key);
}
}
//count each string in the array
$ac = array_count_values($domains);
//this foreach just filter all the domains that not repeat themself over 2 times
foreach ($ac as $email => $item) {
if($item <= 2) {
$less[] = $email;
}
}
foreach ($less as $find) {
array_map(function($domain_key) use ($fileCombo, $output) {
$data = $fileCombo[$domain_key] . PHP_EOL;
fwrite($output, $data);
}, $domains_keys[$find]);
}
fclose($output);
// uncomment to show stats : Credit go to micromvc
/* show_current_stats(); */
输出
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password