PHP-Parser 应用之扫描发现代码中的打印、输出结构语句

PHP-Parser 是由 nikic 开发的一个 PHP 抽象语法树(AST)解析器,可方便的将代码与抽象语法树互相转换。工程上常用来生成模板代码(如 rector)、生成抽象语法树进行静态分析(如 phpstan)。最近学习应用(静态分析)了一下,编写了一个简单的扫描发现代码中的打印、输出结构语句的命令(FindDumpStatementCommand)。

效果

finded-dump-statements

流程概述

  1. 扫描拿到指定的 PHP 文件结果集
  2. 提取文件内容转化为抽象语法树
  3. 遍历抽象语法树节点,匹配符合要求的节点,暂存符合要求的节点信息
  4. 输出节点结果集信息

FindDumpStatementCommand

<?php

/**
 * This file is part of the guanguans/laravel-skeleton.
 *
 * (c) guanguans <ityaozm@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled.
 *
 * @see https://github.com/guanguans/laravel-skeleton
 */

namespace App\Console\Commands;

use Composer\XdebugHandler\XdebugHandler;
use Illuminate\Console\Command;
use Illuminate\Support\Str;
use Illuminate\Support\Stringable;
use PhpParser\Error;
use PhpParser\Node;
use PhpParser\NodeFinder;
use PhpParser\ParserFactory;
use PhpParser\PrettyPrinter\Standard;
use SebastianBergmann\Timer\ResourceUsageFormatter;
use SebastianBergmann\Timer\Timer;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Finder\Finder;
use Symfony\Component\Finder\SplFileInfo;

class FindDumpStatementCommand extends Command
{
    /** @var string */
    protected $signature = '
        find:dump-statement
        {--dir=* : The directories to search for files}
        {--path=* : The paths to search for files}
        {--name=* : The names to search for files}
        {--not-path=* : The paths to exclude from the search}
        {--not-name=* : The names to exclude from the search}
        {--s|struct=* : The structs to search}
        {--f|func=* : The functions to search}
        {--m|parse-mode=1 : The mode(1,2,3,4) to use for the PHP parser}
        {--M|memory-limit= : The memory limit to use for the PHP parser}';
    /** @var string */
    protected $description = 'Find dump statements in PHP files.';
    /** @var \string[][] */
    private $statements = [
        'struct' => [
            'echo',
            'print',
            'die',
            'exit',
        ],
        'func' => [
            'printf',
            'vprintf',
            'var_dump',
            'dump',
            'dd',
            'print_r',
            'var_export'
        ]
    ];

    /** @var \Symfony\Component\Finder\Finder */
    private $fileFinder;
    /** @var \PhpParser\Parser */
    private $parser;
    /** @var \PhpParser\NodeFinder */
    private $nodeFinder;
    /** @var \PhpParser\PrettyPrinter\Standard */
    private $prettyPrinter;
    /** @var \SebastianBergmann\Timer\ResourceUsageFormatter */
    private $resourceUsageFormatter;

    protected function initialize(InputInterface $input, OutputInterface $output)
    {
        $this->checkOptions();
        $this->initializeEnvs();
        $this->initializeProperties();
    }

    public function handle(Timer $timer)
    {
        $timer->start();
        $this->withProgressBar($this->fileFinder, function (SplFileInfo $fileInfo) use (&$findInfos, &$odd) {
            try {
                $nodes = $this->parser->parse($fileInfo->getContents());
            } catch (Error $e) {
                $this->newLine();
                $this->error(sprintf("The file of %s parse error: %s.", $fileInfo->getRealPath(), $e->getMessage()));

                return;
            }

            $dumpNodes = $this->nodeFinder->find($nodes, function (Node $node) {
                if (
                    $node instanceof Node\Stmt\Expression
                    && $node->expr instanceof Node\Expr\FuncCall
                    && $node->expr->name instanceof Node\Name
                    && in_array($node->expr->name->toString(), $this->statements['func'])
                ) {
                    return true;
                }

                return Str::of(class_basename(get_class($node)))
                    ->lower()
                    ->replaceLast('_', '')
                    ->is($this->statements['struct']);
            });
            if (empty($dumpNodes)) {
                return;
            }

            $findInfos[] = array_map(function (Node $dumpNode) use ($fileInfo, $odd) {
                if ($dumpNode instanceof Node\Stmt\Expression && $dumpNode->expr instanceof Node\Expr\FuncCall) {
                    $name = "<fg=cyan>{$dumpNode->expr->name->parts[0]}</>";
                    $type = '<fg=cyan>func</>';
                } else {
                    $name = Str::of(class_basename(get_class($dumpNode)))->lower()->replaceLast('_', '')->pipe(function (Stringable $name) {
                        return "<fg=red>$name</>";
                    });
                    $type = '<fg=red>struct</>';
                }

                $file = Str::of($fileInfo->getRealPath())->replace(base_path().DIRECTORY_SEPARATOR, '')->pipe(function (Stringable $file) use ($odd) {
                    return $odd ? "<fg=green>$file</>" : "<fg=blue>$file</>";
                });
                $line = Str::of($dumpNode->getAttribute('startLine'))->pipe(function (Stringable $line) use ($odd) {
                    return $odd ? "<fg=green>$line</>" : "<fg=blue>$line</>";
                });
                $formattedCode = Str::of($this->prettyPrinter->prettyPrint([$dumpNode]))->pipe(function (Stringable $formattedCode) use ($odd) {
                    return $odd ? "<fg=green>$formattedCode</>" : "<fg=blue>$formattedCode</>";
                });

                return [
                    'index' => null,
                    'name' => $name,
                    'type' => $type,
                    'file' => $file,
                    'line' => $line,
                    'formatted_code' => $formattedCode,
                ];
            }, $dumpNodes);

            $odd = ! $odd;
        });

        $this->newLine();

        if (empty($findInfos)) {
            $this->info('The print statement was not found.');
            $this->info($this->resourceUsageFormatter->resourceUsage($timer->stop()));

            return static::INVALID;
        }

        $findInfos = array_map(function ($info, $index) {
            $index++;
            $info['index'] = "<fg=yellow>$index</>";

            return $info;
        }, $findInfos = array_merge([], ...$findInfos), array_keys($findInfos));

        $this->table(array_map(function ($name) {
            return Str::of($name)->snake()->replace('_', ' ')->title();
        }, array_keys($findInfos[0])), $findInfos);

        $this->info($this->resourceUsageFormatter->resourceUsage($timer->stop()));

        return self::SUCCESS;
    }

    protected function checkOptions()
    {
        if (! in_array($this->option('parse-mode'), [
            ParserFactory::PREFER_PHP7,
            ParserFactory::PREFER_PHP5,
            ParserFactory::ONLY_PHP7,
            ParserFactory::ONLY_PHP5])
        ) {
            $this->error('The parse-mode option is not valid(1,2,3,4).');
            exit(1);
        }

        if ($this->option('struct')) {
            $this->statements['struct'] = array_intersect($this->statements['struct'], $this->option('struct'));
        }

        if ($this->option('func')) {
            $this->statements['func'] = array_intersect($this->statements['func'], $this->option('func'));
        }
    }

    protected function initializeEnvs()
    {
        $xdebug = new XdebugHandler(__CLASS__);
        $xdebug->check();
        unset($xdebug);

        extension_loaded('xdebug') and ini_set('xdebug.max_nesting_level', 2048);
        ini_set('zend.assertions', 0);
        $this->option('memory-limit') and ini_set('memory_limit', $this->option('memory-limit'));
    }

    protected function initializeProperties()
    {
        $this->fileFinder = tap(Finder::create()->files()->ignoreDotFiles(true)->ignoreVCS(true), function (Finder $finder) {
            $methods = [
                'in' => $this->option('dir') ?: [base_path()],
                'path' => $this->option('path') ?: [],
                'notPath' => $this->option('not-path') ?: ['vendor', 'storage'],
                'name' => $this->option('name') ?: ['*.php'],
                'notName' => $this->option('not-name') ?: [],
            ];
            foreach ($methods as $method => $parameters) {
                $finder->{$method}($parameters);
            }
        });

        $this->parser = (new ParserFactory())->create((int)$this->option('parse-mode'));
        $this->nodeFinder = new NodeFinder();
        $this->prettyPrinter = new Standard();
        $this->resourceUsageFormatter = new ResourceUsageFormatter();
    }
}

原文链接

本作品采用《CC 协议》,转载必须注明作者和本文链接
No practice, no gain in one's wit. 我的 Gitub
《L02 从零构建论坛系统》
以构建论坛项目 LaraBBS 为线索,展开对 Laravel 框架的全面学习。应用程序架构思路贴近 Laravel 框架的设计哲学。
《G01 Go 实战入门》
从零开始带你一步步开发一个 Go 博客项目,让你在最短的时间内学会使用 Go 进行编码。项目结构很大程度上参考了 Laravel。
讨论数量: 2

有时候确实在一些地方进行了打印,也忘记了添加一些标志,再去找真的很烦

2年前 评论
guanguans (楼主) 2年前

讨论应以学习和精进为目的。请勿发布不友善或者负能量的内容,与人为善,比聪明更重要!
未填写
文章
58
粉丝
131
喜欢
991
收藏
1349
排名:45
访问:15.5 万
私信
所有博文
社区赞助商