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Fearless refactoring, it does a lot of smart checks to find certain errors.

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moham7dreza/laravel-microscope

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Find Bugs Before They Bite

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Built with ❤️ for lazy Laravel developers ;)

Why repeat the old errors, if there are so many new errors to commit?

(Bertrand Russel)

Give your eyes a rest, we will detect and fix them for you.

Packagist Stars Required Laravel Version Required PHP Version Latest Version on Packagist Quality Score Total Downloads Today Downloads

Key things to know:

  • It is created to be smarter than phpstorm and other IDEs in finding errors.
  • It is created to understand laravel run-time and magic.
  • It does not show you stupid false errors, all the reported cases are really errors.
  • Even If you have written a lot of tests for your app, you may still need this.
  • It can refactor your code, by applying early returns automatically.
  • It is written from scratch to yield the maximum performance possible.

🎞️ Video tutorial here

⭐ Your Stars Make Us Do More

If you found this package useful, and you want to encourage the maintainer to work on it, just press the star button to declare your willingness.

Stargazers

⬇️ Installation

You can install the package via composer:

composer require imanghafoori/laravel-microscope --dev

You may also publish config file:

php artisan vendor:publish --provider="Imanghafoori\LaravelMicroscope\LaravelMicroscopeServiceProvider"

💎 Usage:

Useful Commands:

You can run 👇

# Artisan Command
1 php artisan search_replace
2 php artisan check:early_returns
3 php artisan check:all

Less Use Commands

# Artisan Command
1 php artisan check:views
2 php artisan check:routes
3 php artisan check:psr4 {-s|--nofix}
4 php artisan check:imports {-s|--nofix}
5 php artisan check:stringy_classes
6 php artisan check:dd
7 php artisan check:bad_practices
8 php artisan check:compact
9 php artisan check:blade_queries
10 php artisan check:action_comments
11 php artisan check:extract_blades
12 php artisan pp:route
13 php artisan check:generate
14 php artisan check:endif
15 php artisan check:events
16 php artisan check:gates
17 php artisan check:dynamic_where
18 php artisan check:aliases
19 php artisan check:dead_controllers
20 php artisan check:generic_docblocks
21 php artisan enforce:helper_functions
22 php artisan list:models

Global Helper Functions

Also, You will have access to some global helper functions

microscope_dd_listeners($event);

In case you wonder what the listeners are and where they are, you can call microscope_dd_listeners(MyEvent::class); within either the boot or register methods. It works like a normal dd(...); meaning that the program stops running at that point.

📖 What do the Commands do?

Let's start with the:

php artisan search_replace {--name=pattern_name} {--tag=some_tag} {--file=partial_file_name} {--folder=partial_folder_name}

This is a smart and very powerful search/replace functionality that can be a real "time saver" for you.

1️⃣ Defining patterns:

If you run the command artisan search_replace for the first time, it will create a search_replace.php file in the project's root. Then, you can define your patterns, within that file.

Examples:

Let's define a pattern to replace the optional() global helper with the ?-> php 8 null safe operator:

return [
    'optional_to_nullsafe' => [
        'search' => '"<global_func_call:optional>"("<in_between>")->',
        'replace' => '"<2>"?->',
        // 'tag' => 'php8,refactor',
        // 'predicate' => function($matches, $tokens) {...},
        // 'mutator' => function($matches) {...},
        // 'post_replace' => [...],
        // 'avoid_result_in' => [...],
        // 'avoid_syntax_errors' => false,
        // 'filters' => [...],
    ]
];
  • Here the key optional_to_nullsafe is the "unique name" of your pattern. (You can target your pattern by running php artisan search_replace --name=optional_to_nullsafe)
  • The search pattern has a "<in_between>" placeholder which captures everything in between the pair of parenthesis.
  • In the replace block we substitute what we have captured by the first placeholder with the "<1>". If we have more placeholders, we could have had "<2>" etc.
  • In the tag block we can mention some tags as an array of strings or a string separated by commas and target them by --tag flag: php artisan search_replace --tag=php8

2️⃣ Placeholders:

Here is a comprehensive list of placeholders you can use:

# Placeholders Description
1 <var> or <variable> for variables like: $user
2 <str> or <string> for hard coded strings: 'hello' or "hello"
3 <class_ref> for class references: \App\User::where(... , User::where
4 <full_class_ref> only for full references: \App\User::
5 <until> to capture all the code until you reach a certain character.
6 <comment> for comments (it does not capture doc-blocks beginning with: /** )
7 <doc_block> for php doc-blocks
8 <statement> to capture a whole php statement.
9 <name:nam1,nam2> or <name> for method or function names. ->where or ::where
10 <white_space> for whitespace blocks
11 <bool> or <boolean> for true or false (acts case-insensetive)
12 <number> for numeric values
13 <cast> for type-casts like: (array) $a;
14 <int> or "<integer>" for integer values
15 <visibility> for public, protected, private
16 <float> for floating point number
17 "<global_func_call:func1,func2>" to detect global function calls
18 <in_between> to capture code within a pair of {...} or (...) or [...]
19 <any> captures any token.

You can also define your own keywords if needed!

You just define a class for your new keyword and append the class path to the end of the Finder::$keywords[] = MyKeyword::class property. Just like the default keywords.

Example:

1️⃣ Let's say you want to find only the "comments" which contain the word "todo:" in them.

 'todo_comments' => [
        'search' => '<comment>',
        'predicate' => function($matches) {    //   <====  here we check comment has "todo:"
            $comment = $matches[0]; // first placeholder value
            $content = $comment[1]; // get its content
            
            return Str::contains($content, 'todo:') ? true : false;
        },
]

Note If you do not mention the 'replace' key it only searches and reports them to you.

2️⃣ Ok, now let's say you want to remove the "todo:" word from your comments:

 'remove_todo_comments' => [
    'search' => '<comment>',      //   <=== we capture any comment
    'replace' => '<1>',

    'predicate' => function($matches) {
        $comment = $matches[0]; // first matched placeholder
        $content = $comment[1];

        return Str::contains($content, 'todo:') ? true : false;
    },

    'mutator' => function ($matches) {       //  <=== here we remove "todo:"
        $matches[0][1] = str_replace('todo:', '', $matches[0][1]);

        return $matches;
    }
]

Converts: // todo: refactor code Into: // refactor code

3️⃣ Mutator: In mutators, you are free to manipulate the $matched values as much as you need to before replacing them in the results. You can also mention a static method instead of a function, like this: [MyClass::class, 'myStaticMethod']

3️⃣ Let's say you want to put the optional comma for the Lets elements in the arrays if they are missing.

    'enforce_optional_comma' => [
        'search' => '<white_space>?]',
        'replace' => ',"<1>"]',
        'avoid_syntax_errors' => true,
        'avoid_result_in' => [
           ',,]',
           '[,]',
           '<var>[,]'
       ],
    ]

In this case, our pattern is not very accurate and in some cases, it may result in syntax errors. Because of that, we turn on php syntax validator to check the result, but that costs us a performance penalty!!! To exclude the usage of php, to validate the results we have mentioned the avoid_result_in so that if they happen in the result it skips.

  • Note: The ? in the "<white_space>?" notes this is an optional placeholder.

If you are curious to see a better pattern which does not need any syntax checking, try this:

'enforce_optional_comma' => [
       'search' => '<1:any><2:white_space>?[<3:until_match>]',
       'replace' => '<1><2>[<3>,]',
       'avoid_result_in' => [
           ',,]',
           '[,]'
       ],
       'predicate' => function ($matches) {
           $type = $matches['values'][0][0];

           return $type !== T_VARIABLE && $type !== ']';
       },
       'post_replace' => [
           '<1:white_space>,]' => ',<1>]'
       ]
],

This is more complex but works much faster. (since it does not need the php syntax validator)

  • Here 'post_replace' is a pattern which is applied only and only on the resulting code to refine it, and NOT on the entire file.

  • You can optionally comment your placeholders (as above <1:any>) with numbers, so that you know which one corresponds to which when replaced.

4️⃣ Filters:

Currently, the microscope offers only two built-in filters: is_sub_class_of and in_array

Can you guess what the heck this pattern is doing?!

 'mention_query' => [
      'search' => '<1:class_ref>::<2:name>'
      'replace' => '<1>::query()-><2>',
      'filters' => [
          1 => [
              'is_sub_class_of' => \Illuminate\Database\Eloquent\Model::class
          ],
          2 => [
              'in_array' => 'where,count,find,findOrFail,findOrNew'
          ]
      ]
  ]

It converts these:

User::where(...)->get();

\App\Models\User::find(...);

Into these:

User::query()->where(...)->get();

\App\Models\User::query()->find(...);
  • The filters here ensure that the captured class reference is a laravel Model and the method name is one of the names mentioned in the list.

So it does not tamper with something like this:

User::all();            // The `all` method can not be preceded with `query`

UserRepo::where(...);   /// UserRepo is not a model
  • This is something which you can never do by regex.

5️⃣ Capturing php "statements":

Let's say we want to opt into php 7.4 arrow functions:

'fn' => [
    'search' => 'function (<in_between>)<until>{ <statement> }',
    'replace' => 'fn (<1>) => <3>',
    'tags' => 'php74,refactor',
    'mutator' => function ($matches) {
      $matches[2][1] = str_replace(['return ', ';'], '', $matches[2][1]);

      return $matches;
    }
]

In this example, we have mentioned one single "statement" in the body of the function. So if it encounters a function with two or more statements it will ignore that.

$closure = function ($a) use ($b) {
    return $a + $b;
};

// will become:
$closure = fn($a) => $a + $hello;

But this is not captured:

$closure = function ($a) {
    $a++;
    return $a + $b;
};

6️⃣ Difference between <statement> and <until>;

They seem to be very similar but there is an important case which you can not use <until>; in order to cover it properly!

$first = $a + $b;

$second = function ($a) {
    $a++;

    return $a;
};

If we define our pattern like this:

return [
    'staty' => [
        'search' => '<var> = <until>;',   
    ]
];

For $c = $a + $b; they act the same way, but for the second one "<until>"; will not capture the whole closure and will stop as soon as it reaches $a++; and that is a problem.

But if you define your pattern as: '<var> = <statement>' it would be smart enough to capture the correct semicolon at the end of closure definition and whole close would be captured.

7️⃣ Capturing global function calls:

Let's say you want to eliminate all the dd(...) or dump(...) before pushing to production.

return [
    'remove_dd' => [
        'search' =>  "'<global_func_call:dd,dump>'('<in_between>');", 
        'replace' => ''
    ]
];

This will NOT capture cases like below:

$this->  dd('hello');          // is technically a method call
User::   dd('I am static');    // is technically a static method call
new      dd('I am a class');  // here "dd" is the name of a class.

But will detect and remove real global dd() calls with whatever parameters they have received.

dd(                // <=== will be detected, even the pattern above is written all in one line.
   auth('admin')
        ->user()->id   
);
    
    
\dd(1);
dd(1);
dump(1);

8️⃣ Repeating patterns:

Let's say we want to refactor:

User:where('name', 'John')->where('family', 'Dou')->where('age', 20)->get();

into:

User:where([
    'name' => 'John',
    'family' => 'Dou',
    'age'=> 20,
])->get();

Ok, how the pattern would look like then?!

"group_wheres" => [
       
       'search' => '<1:class_ref>::where('<2:str>', '<3:str>')'<repeating:wheres>'->get();'
       
       'replace' => '<1>::where([
           <2> => <3>,
           "<repeating:1:key_values>"])->get();',

       'named_patterns' => [
           'wheres' => '->where(<str>, <str>)<white_space>?',
           'key_values' => '<1> => <2>,<3>',
       ]
   ]

Nice yeah??!

Possibilities are endless and the sky is the limit...

php artisan check:early_returns

This will scan all your Psr-4 loaded classes and flattens your functions and loops by applying the early return rule. For example:

<?php

foreach ($products as $product) {
    if ($someCond) {
        // A lot of code 1
        // A lot of code 1
        // A lot of code 1
        // A lot of code 1
        // A lot of code 1
        if ($someOtherCond) {
            // A lot more code 2
            // A lot more code 2
            // A lot more code 2
            // A lot more code 2 
            // A lot more code 2
            //
        } // <--- closes second if
    } // <--- closes first if
}

Will be discovered and converted into:

<?php

foreach ($products as $product) {
    if (! $someCond) {
        continue;
    }
    
    // A lot of code 1
    // A lot of code 1
    // A lot of code 1
    // A lot of code 1
    // A lot of code 1

    if (! $someOtherCond) {
        continue;
    }
 
    // A lot more code 2
    // A lot more code 2
    // A lot more code 2
    // A lot more code 2 
    // A lot more code 2
}

The same thing will apply for functions and methods, but with return

<?php

if ($cond1) {
    if ($cond2) {
        ....       
    }
}

// merge into:

if ($cond1 && $cond2) { 
    ...  
}
  • It also supports the ruby-like if():/endif; syntax;
<?php

if ($var1 > 1):
    if ($var2 > 2):
        echo 'Hey Man';
    endif;
endif;

// Or if you avoid putting curly braces...
if ($var1 > 1)
    if ($var2 > 2)
        echo 'Hey Man';

Although this type of refactoring is safe and is guaranteed to do the same thing as before, be careful to commit everything before trying this feature, in case of a weird bug or something.

php artisan check:psr4

  • It checks for all the psr4 autoload defined in the composer.json file and goes through all the classes to have the right namespace, according to PSR-4 standard.
  • It automatically corrects namespaces (according to PSR-4 rules)
  • It also checks for references to the old namespace with the system and replaces them with the new one.

php artisan check:generate

You make an empty file, and we fill it, based on naming conventions.

If you create an empty .php file which ends with ServiceProvider.php after running this command: 1 - It will be filled with a boilerplate and correct Psr-4 namespace. 2 - It will be appended to the providers array in the config/app.php

php artisan check:imports

  • It checks all the imports (use statements) to be valid and reports invalid ones.
  • It autocorrects some references, no ambiguity is around the class name.
  • It can understand the laravel aliased classes so use Request; would be valid.

php artisan check:bad_practices

  • It detects bad practices like env() calls outside the config files.

php artisan check:routes

  • It checks that your routes refer to valid controller classes and methods.
  • It checks all the controller methods to have valid type-hints.
  • It scans for route(), redirect()->route(), \Redirect::route() to refer to valid routes.
  • It will report the public methods of controllers, which have no routes pointing to them. In other words dead controllers are detected.

php artisan check:compact

  • In php 7.3 if you "compact" a non-existent variable you will get an error, so this command checks the entire project for wrong compact() calls and reports to you, which parameters should be removed.

php artisan check:blade_queries

  • Blade files should not contain DB queries. We should move them back into controllers and pass variables. This command searches all the blade files for Eloquent models and DB query builder and shows them if any.

php artisan check:extract_blades

  • If you want to extract a blade partial out and make it included like: @include('myPartials.someFile')

You can use {!! extractBlade('myPartials.someFile') !!} in your blade files to indicate start/end line and the path/name of the partial you intend to be made.

 <html>
      
      {!! extractBlade('myPartials.head') !!}
          <head>...</head>
      {!! extractBlade() !!}

      
      {!! extractBlade('myPartials.body') !!}
          <body>...</body>
      {!! extractBlade() !!}
      
 </html>

After you execute php artisan check:extract_blades it will become:

<html>
    @include('myPartials.head')
    @include('myPartials.body')
</html>

Also, it will create:

  • resources/views/myPartials/head.blade.php
  • resources/views/myPartials/body.blade.php

And put the corresponding content in them.

  • It is also compatible with namespaced views in modular laravel applications. So this syntax will work: 'MyMod::myPartials.body'

php artisan check:action_comments {--file=SomeFile.php}

  • This adds annotations in the controller actions so that you know which route is pointing to the current controller action.
  • You can use the --file= option to narrow down the scanned files.

php artisan pp:route

  • First, you have to put this in your route file: microscope_pretty_print_route('my.route.name');
  • You can also pass the Controller@method syntax to the function.
  • You can call it multiple times to pretty-print multiple routes.

php artisan check:views

  • It scans your code and finds the view() and View::make() and reports if they refer to the wrong files.
  • It scans your blade files for @include() and @extends() and reports if they refer to the wrong files.

Also, it can detect unused variables which are passed into your view from the controller like this: view('hello', [...]); For that you must open up the page in the browser and then visit the log file to see a message like this:

local.INFO: Laravel Microscope: The view file: welcome.index-1 at App\Http\Controllers\HomeController@index has some unused variables passed to it:   
local.INFO: array ('$var1' , '$var2');

Remember some variables are passed into your view from a view composer and not the controller. Those variables are also taken into consideration when detecting unused variables.

php artisan check:events

For example, consider:

Event::listen(MyEvent::class, '\App\Listeners\MyListener@myMethod');

1 - It checks the \App\Listeners\MyListener classpath to be valid.

2 - It checks the myMethod method to exist on the MyListener class

3 - It checks the myMethod method to have the right type-hint (if any) in its signature, for example:

public function myMethod(OtherEvent $e) // <---- notice type-hint here
{
    //
}

This is a valid but wrong type-hint, and will be reported to you. Very cool, isn't it ??!

  • Note that it does not matter how you are setting your event listener,

1- in the EventServiceProvider,

2- By Event::listen facade,

3- By Subscriber class... or any other way. The error would be found. :)

php artisan check:gates

It checks the validity of all the gates you have defined, making sure that they refer to a valid class and method.

It also checks for the policy definitions to be valid.

Gate::policy(User::class, 'UserPolicy@someMethod');
Gate::define('someAbility', 'UserGate@someMethod');

1 - It checks the User classpath to be valid.

2 - It checks the UserPolicy classpath to be valid.

3 - It checks the someMethod method to exist.

php artisan check:dynamic_where

  • It looks for "dynamic where" methods like whereFamilyName('...') with where('family_name', '...').

php artisan enforce:query

  • It calls the static query method on your eloquent query chains so that IDEs can understand eloquent.

  • For example, converts: User::where(... to User::query()->where(...

php artisan check:dead_controllers

  • We can find the controllers that don't have any routes.

php artisan check:generic_docblocks {--folder=app/Models} {--file=SomeFile.php}

  • Removes Laravel's DocBlocks.
  • You can use --folder= or --file= option to narrow down the scanned folders.

php artisan enforce:helper_functions {--folder=app/Models} {--file=SomeFile.php}

  • Converting Laravel facade into helper functions.
  • You can use --folder= or --file= option to narrow down the scanned folders.

php artisan list:models {--folder=app/Models}

  • It searches the project and lists the model classes.
  • You can use --folder= option to narrow down the scanned folders.

And more features will be added soon. ;)

Credits

License

The MIT License (MIT). Please see License File for more information.

🙋 Contributing

If you find an issue or have a better way to do something, feel free to open an issue, or a pull request. If you use laravel-microscope in your open source project, create a pull request to provide its URL as a sample application in the README.md file.

❗ Security

If you discover any security-related issues, please email [email protected] instead of using the issue tracker.

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A man will never fail unless he stops trying.

Albert Einstein

❤️ Contributors

This project exists thanks to all the people who contribute. [Contributors].

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