如何在PHP项目中找到任何未使用的函数?
是否有功能或API内置到PHP,让我分析我的代码库-例如反射,token_get_all()
?
这些API功能是否足够丰富,我不必依赖第三方工具来执行此类分析?
Gor*_*don 33
你可以试试Sebastian Bergmann的死码探测器:
phpdcd
是用于PHP代码的死代码检测器(DCD).它扫描PHP项目中所有已声明的函数和方法,并将其报告为"死代码",至少不会调用一次.
资料来源:https://github.com/sebastianbergmann/phpdcd
请注意,它是一个静态代码分析器,因此它可能会为仅动态调用的方法提供误报,例如它无法检测 $foo = 'fn'; $foo();
你可以通过PEAR安装它:
pear install phpunit/phpdcd-beta
Run Code Online (Sandbox Code Playgroud)
之后,您可以使用以下选项:
Usage: phpdcd [switches] <directory|file> ...
--recursive Report code as dead if it is only called by dead code.
--exclude <dir> Exclude <dir> from code analysis.
--suffixes <suffix> A comma-separated list of file suffixes to check.
--help Prints this usage information.
--version Prints the version and exits.
--verbose Print progress bar.
Run Code Online (Sandbox Code Playgroud)
更多工具:
注意:根据存储库通知,此项目不再维护,其存储库仅用于存档目的.所以你的里程可能不一样.
Sta*_*rds 24
感谢Greg和Dave的反馈.不是我想要的,但我决定花一点时间研究它,并提出了这个快速而肮脏的解决方案:
<?php
$functions = array();
$path = "/path/to/my/php/project";
define_dir($path, $functions);
reference_dir($path, $functions);
echo
"<table>" .
"<tr>" .
"<th>Name</th>" .
"<th>Defined</th>" .
"<th>Referenced</th>" .
"</tr>";
foreach ($functions as $name => $value) {
echo
"<tr>" .
"<td>" . htmlentities($name) . "</td>" .
"<td>" . (isset($value[0]) ? count($value[0]) : "-") . "</td>" .
"<td>" . (isset($value[1]) ? count($value[1]) : "-") . "</td>" .
"</tr>";
}
echo "</table>";
function define_dir($path, &$functions) {
if ($dir = opendir($path)) {
while (($file = readdir($dir)) !== false) {
if (substr($file, 0, 1) == ".") continue;
if (is_dir($path . "/" . $file)) {
define_dir($path . "/" . $file, $functions);
} else {
if (substr($file, - 4, 4) != ".php") continue;
define_file($path . "/" . $file, $functions);
}
}
}
}
function define_file($path, &$functions) {
$tokens = token_get_all(file_get_contents($path));
for ($i = 0; $i < count($tokens); $i++) {
$token = $tokens[$i];
if (is_array($token)) {
if ($token[0] != T_FUNCTION) continue;
$i++;
$token = $tokens[$i];
if ($token[0] != T_WHITESPACE) die("T_WHITESPACE");
$i++;
$token = $tokens[$i];
if ($token[0] != T_STRING) die("T_STRING");
$functions[$token[1]][0][] = array($path, $token[2]);
}
}
}
function reference_dir($path, &$functions) {
if ($dir = opendir($path)) {
while (($file = readdir($dir)) !== false) {
if (substr($file, 0, 1) == ".") continue;
if (is_dir($path . "/" . $file)) {
reference_dir($path . "/" . $file, $functions);
} else {
if (substr($file, - 4, 4) != ".php") continue;
reference_file($path . "/" . $file, $functions);
}
}
}
}
function reference_file($path, &$functions) {
$tokens = token_get_all(file_get_contents($path));
for ($i = 0; $i < count($tokens); $i++) {
$token = $tokens[$i];
if (is_array($token)) {
if ($token[0] != T_STRING) continue;
if ($tokens[$i + 1] != "(") continue;
$functions[$token[1]][1][] = array($path, $token[2]);
}
}
}
?>
Run Code Online (Sandbox Code Playgroud)
我可能会花更多的时间在上面,这样我就可以快速找到函数定义和引用的文件和行号; 这些信息正在收集,只是没有显示.
小智 18
这一点bash脚本可能会有所帮助:
grep -rhio ^function\ .*\( .|awk -F'[( ]' '{print "echo -n " $2 " && grep -rin " $2 " .|grep -v function|wc -l"}'|bash|grep 0
Run Code Online (Sandbox Code Playgroud)
这基本上递归地抓取当前目录的函数定义,将命中传递给awk,这形成了执行以下操作的命令:
然后将此命令发送到bash执行,输出被grepped为0,这表示0调用该函数.
请注意,这不是解决问题calebbrown上述列举,所以有可能在输出一些误报.
用法:find_unused_functions.php <root_directory>
注意:这是解决问题的"快速肮脏"方法.此脚本仅对文件执行词法传递,并且不考虑不同模块定义具有相同名称的函数或方法的情况.如果您使用IDE进行PHP开发,它可能会提供更全面的解决方案.
需要PHP 5
为了节省您的复制和粘贴,可以在此处获得直接下载和任何新版本.
#!/usr/bin/php -f
<?php
// ============================================================================
//
// find_unused_functions.php
//
// Find unused functions in a set of PHP files.
// version 1.3
//
// ============================================================================
//
// Copyright (c) 2011, Andrey Butov. All Rights Reserved.
// This script is provided as is, without warranty of any kind.
//
// http://www.andreybutov.com
//
// ============================================================================
// This may take a bit of memory...
ini_set('memory_limit', '2048M');
if ( !isset($argv[1]) )
{
usage();
}
$root_dir = $argv[1];
if ( !is_dir($root_dir) || !is_readable($root_dir) )
{
echo "ERROR: '$root_dir' is not a readable directory.\n";
usage();
}
$files = php_files($root_dir);
$tokenized = array();
if ( count($files) == 0 )
{
echo "No PHP files found.\n";
exit;
}
$defined_functions = array();
foreach ( $files as $file )
{
$tokens = tokenize($file);
if ( $tokens )
{
// We retain the tokenized versions of each file,
// because we'll be using the tokens later to search
// for function 'uses', and we don't want to
// re-tokenize the same files again.
$tokenized[$file] = $tokens;
for ( $i = 0 ; $i < count($tokens) ; ++$i )
{
$current_token = $tokens[$i];
$next_token = safe_arr($tokens, $i + 2, false);
if ( is_array($current_token) && $next_token && is_array($next_token) )
{
if ( safe_arr($current_token, 0) == T_FUNCTION )
{
// Find the 'function' token, then try to grab the
// token that is the name of the function being defined.
//
// For every defined function, retain the file and line
// location where that function is defined. Since different
// modules can define a functions with the same name,
// we retain multiple definition locations for each function name.
$function_name = safe_arr($next_token, 1, false);
$line = safe_arr($next_token, 2, false);
if ( $function_name && $line )
{
$function_name = trim($function_name);
if ( $function_name != "" )
{
$defined_functions[$function_name][] = array('file' => $file, 'line' => $line);
}
}
}
}
}
}
}
// We now have a collection of defined functions and
// their definition locations. Go through the tokens again,
// and find 'uses' of the function names.
foreach ( $tokenized as $file => $tokens )
{
foreach ( $tokens as $token )
{
if ( is_array($token) && safe_arr($token, 0) == T_STRING )
{
$function_name = safe_arr($token, 1, false);
$function_line = safe_arr($token, 2, false);;
if ( $function_name && $function_line )
{
$locations_of_defined_function = safe_arr($defined_functions, $function_name, false);
if ( $locations_of_defined_function )
{
$found_function_definition = false;
foreach ( $locations_of_defined_function as $location_of_defined_function )
{
$function_defined_in_file = $location_of_defined_function['file'];
$function_defined_on_line = $location_of_defined_function['line'];
if ( $function_defined_in_file == $file &&
$function_defined_on_line == $function_line )
{
$found_function_definition = true;
break;
}
}
if ( !$found_function_definition )
{
// We found usage of the function name in a context
// that is not the definition of that function.
// Consider the function as 'used'.
unset($defined_functions[$function_name]);
}
}
}
}
}
}
print_report($defined_functions);
exit;
// ============================================================================
function php_files($path)
{
// Get a listing of all the .php files contained within the $path
// directory and its subdirectories.
$matches = array();
$folders = array(rtrim($path, DIRECTORY_SEPARATOR));
while( $folder = array_shift($folders) )
{
$matches = array_merge($matches, glob($folder.DIRECTORY_SEPARATOR."*.php", 0));
$moreFolders = glob($folder.DIRECTORY_SEPARATOR.'*', GLOB_ONLYDIR);
$folders = array_merge($folders, $moreFolders);
}
return $matches;
}
// ============================================================================
function safe_arr($arr, $i, $default = "")
{
return isset($arr[$i]) ? $arr[$i] : $default;
}
// ============================================================================
function tokenize($file)
{
$file_contents = file_get_contents($file);
if ( !$file_contents )
{
return false;
}
$tokens = token_get_all($file_contents);
return ($tokens && count($tokens) > 0) ? $tokens : false;
}
// ============================================================================
function usage()
{
global $argv;
$file = (isset($argv[0])) ? basename($argv[0]) : "find_unused_functions.php";
die("USAGE: $file <root_directory>\n\n");
}
// ============================================================================
function print_report($unused_functions)
{
if ( count($unused_functions) == 0 )
{
echo "No unused functions found.\n";
}
$count = 0;
foreach ( $unused_functions as $function => $locations )
{
foreach ( $locations as $location )
{
echo "'$function' in {$location['file']} on line {$location['line']}\n";
$count++;
}
}
echo "=======================================\n";
echo "Found $count unused function" . (($count == 1) ? '' : 's') . ".\n\n";
}
// ============================================================================
/* EOF */
Run Code Online (Sandbox Code Playgroud)
我已经使用了上面概述的其他方法,即使这里的2019 更新答案也已过时。
Tomáš Votruba 的回答让我找到了 Phan,因为 ECS 路线现已被弃用。Symplify 已经删除了死的公共方法检查器。
我们可以利用 Phan 来搜索死代码。以下是使用 composer 进行安装的步骤。这些步骤也可以在phan的git repo 中找到。这些说明假定您处于项目的根目录。
composer require phan/phan
Run Code Online (Sandbox Code Playgroud)
PHP-AST
是 Phan 的要求 因为我使用的是 WSL,所以我已经能够使用 PECL 进行安装,但是,php-ast
可以在 git repo 中找到其他安装方法
pecl install ast
Run Code Online (Sandbox Code Playgroud)
定位当前 php.ini
php -i | grep 'php.ini'
Run Code Online (Sandbox Code Playgroud)
现在获取该文件位置和 nano(或您选择的任何一个来编辑此文档)。找到所有扩展的区域并添加以下行:
extension=ast.so
Run Code Online (Sandbox Code Playgroud)
配置文件的步骤可以在 Phan 的关于如何创建配置文件的文档中找到。
你会想要使用他们的示例,因为它是一个很好的起点。编辑以下数组以在directory_list
&上添加您自己的路径
exclude_analysis_directory_list
。请注意,exclude_analysis_directory_list
仍然会被解析但不会被验证,例如。在此处添加 Wordpress 目录意味着,主题中调用的 wordpress 函数的误报不会出现,因为它在 wordpress 中找到了该函数,但同时它不会验证 wordpress 文件夹中的函数。我的看起来像这样
......
'directory_list' => [
'public_html'
],
......
'exclude_analysis_directory_list' => [
'vendor/',
'public_html/app/plugins',
'public_html/app/mu-plugins',
'public_html/admin'
],
......
Run Code Online (Sandbox Code Playgroud)
现在我们已经安装了 phan 和 ast,配置了我们想要解析的文件夹,是时候运行 Phan 了。我们将向 phan 传递一个参数,--dead-code-detection
这是不言自明的。
./vendor/bin/phan --dead-code-detection
Run Code Online (Sandbox Code Playgroud)
此输出需要使用细齿梳进行验证,但它无疑是最好的起点
控制台中的输出将如下所示
the/path/to/php/file.php:324 PhanUnreferencedPublicMethod Possibly zero references to public method\the\path\to\function::the_funciton()
the/path/to/php/file.php:324 PhanUnreferencedPublicMethod Possibly zero references to public method\the\path\to\function::the_funciton()
the/path/to/php/file.php:324 PhanUnreferencedPublicMethod Possibly zero references to public method\the\path\to\function::the_funciton()
the/path/to/php/file.php:324 PhanUnreferencedPublicMethod Possibly zero references to public method\the\path\to\function::the_funciton()
Run Code Online (Sandbox Code Playgroud)
请随时添加到此答案或纠正我的错误:)
归档时间: |
|
查看次数: |
22337 次 |
最近记录: |