php 相关问题

PHP（PHP：Hypertext Preprocessor）是一种广泛使用的，高级，动态，面向对象和解释的脚本语言，主要用于服务器端Web开发。

依赖下拉菜单，第二个下拉菜单未填充，Codeigniter

我有一个依赖下拉列表，它可以获取第一个下拉列表中的类别，并且应该获取第二个下拉列表中的子类别，但子类别下拉列表未填充。我有类似的东西...

php ajax codeigniter

回答 1 投票 0

Symfony 3.4 - 如果多对多关系上不存在则坚持

我面临着一个非常烦人的问题。我有一个 Recipe 实体，其中包含一些具有多对多关系的成分（带有一个 Ingredient 实体）和一个用于映射的 RecipeIngredient 实体。 ...

php symfony doctrine persistence

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如何使用 Laravel 本地化工具更改布局的语言？

我正在使用 Laravel 的本地化工具来更改应用程序的语言（英语和法语）。通过导航栏中的选择即可更改语言。有了官方文档我...

php laravel laravel-blade laravel-localization

回答 2 投票 0

Yii2 设置只读属性

大家好当我尝试创建客户端时，出现错误：设置只读属性：app\models orm\ClientForm::Clientclient 我该如何修复这个错误？这是我的客户客户（模型）班级

php yii2 yii2-advanced-app yii2-model

回答 2 投票 0

如果某个值出现 3 次或更多次，则过滤数组

嘿，所以我构建了一个过滤组合列表的脚本，它只输出不会重复超过2次的组合，但它超级慢，这是我的脚本：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 包含这些行： [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 来自 80,000 行文件的样本 [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

php arrays optimization

回答 2 投票 0

PHP ini_设置内存限制

当我们在代码中使用如下所示的 ini_set 时，所有其他代码的内存限制是否相同？或者仅对我们添加的代码有效？ ini_set('内存限制', '512M'); 谢谢

php memory memory-limit

回答 2 投票 0

为什么使用短回显标签时会收到 T_ECHO？ [已关闭]

PHP 文档指出： <%= $variable; # This is a shortcut for "<% echo . . ." %> 这是“”的快捷方式 ...是...

php

回答 1 投票 0

sprintf() 的 %g 占位符正在截断数字，并以逗号作为小数分隔符

我有以下数字：-4, -3.5, 0, 14.46 我应该使用哪种 sprintf() 格式？现在我使用 %g，但这会从 14,46 打印 14。为什么会出现这种情况？