The reflection class reports information about a PHP7 file. Collects functions, interfaces, classes, traits with his constants, properties, methods.

EnsoStudio\ReflectionFile.php

<?php

namespace EnsoStudio;

use Reflector;
use Reflection;
use ReflectionClass;
use ReflectionType;
use ReflectionNamedType;
use ReflectionFunctionAbstract;

/**
 * The reflection class reports information about a PHP >= 7 file. Collects functions/interfaces/classes/traits with
 * his constants/properties/methods.
 * 
 * @author info@ensostudio.ru
 * @license MIT
 */
class ReflectionFile
{
    /**
     * Types to fix
     */
    const FIX_TYPES = ['boolean' => 'bool', 'integer' => 'int'];

    /**
     * @var array
     */
    protected $declared = [
        'constants'  => [],
        'functions'  => [],
        'interfaces' => [],
        'traits'     => [],
        'classes'    => [],
    ];

    /**
     * @var array
     */
    protected $comments = [];

    /**
     * @var array
     */
    protected $constants = [];

    /**
     * @var array
     */
    protected $functions = [];

    /**
     * @var array
     */
    protected $interfaces = [];

    /**
     * @var array
     */
    protected $traits = [];

    /**
     * @var array
     */
    protected $classes = [];

    /**
     * @param string $file the path to PHP file
     */
    public function __construct($file)
    {
        foreach (array_keys($this->declared) as $type) {
            $this->declared[$type] = $this->getDeclared($type);
        }

        require_once realpath($file);
    }

    /**
     * @param string $type
     * @return array
     */
    protected function getDeclared($type)
    {
        if (in_array($type, ['constants', 'functions'])) {
            $result = "get_defined_{$type}"(true);
            return $result['user'] ?? [];
        }

        return "get_declared_{$type}"();
    }

    /**
     * @param string $comment DocComment
     * @return array [description: string, tags: array]
     */
    public function parseComment($comment)
    {
        $description = '';
        $tags = [];
        $matches = [];
        
        $comment = trim($comment);
        if ($comment) {
            // $comment = strtr(substr($comment, 2, -2), ["\r" => '']);
            // Remove '/*', '*/'
            $comment = substr($comment, 2, -2);
            if (preg_match_all('/^\s*\*\s+?(.*)$/m', $comment, $matches)) {
                $comment = [];
                foreach ($matches[1] as $line) {
                    if (substr($line, 0, 1) == '@') {
                        $comment[] = trim($line);
                    } else {
                        $comment[count($comment) - 1] .= ' ' . trim($line);
                    }
                }
                
                foreach ($comment as $line) {
                    if (preg_match('/^@([-a-z]+)\s*(.*)$/mi', $line, $matches)) {
                        list(, $tag, $line) = $matches;
                        if (!isset($tags[$tag])) {
                            $tags[$tag] = [];
                        }
                        if ($tag == 'param') {
                            $line = preg_split('/\s+/', $line, 3);
                            if (count($line) > 1) {
                                $tags[$tag][substr($line[1], 1)] = [
                                    'type' => strtr($line[0], self::FIX_TYPES), 
                                    'description' => $line[2] ?? '',
                                ];
                            }
                        } elseif (in_array($tag, ['var', 'return', 'throws'])) {
                            $line = preg_split('/\s+/', $line, 2);
                            if (count($line) > 1) {
                                $tags[$tag][] = [
                                    'type' => strtr($line[1], self::FIX_TYPES),
                                    'description' => $line[1] ?? '',
                                ];
                            }
                        } else {
                            $tags[$tag][] = $line;
                        }
                    } else {
                        $description = $line;
                    }
                }
            }
        }

        return compact('description', 'tags');
    }
    
    /**
     * Parse comment.
     * 
     * @param Reflector $r
     * @param string|null $returnTag
     * @return mixed
     */
    protected function getComment(Reflector $r, $returnTag = null)
    {
        if (property_exists($r, 'class')) {
            $key = $r->class . '::' . $r->name;
        } else {
            $key = $r->name;
        }
        
        if (!isset($this->comments[$key])) {
            $comment = $r->getDocComment();
            $this->comments[$key] = $this->parseComment($comment);
        }
        
        if ($returnTag) {
            return $this->comments[$key]['tags'][$returnTag] ?? null;
        }
        return $this->comments[$key];
    }
    
    /**
     * Returns modifier names.
     * 
     * @param Reflector $r
     * @return array
     */
    public function getModifierNames(Reflector $r)
    {
        return Reflection::getModifierNames($r->getModifiers());
    }
    
    /**
     * Returns type name.
     * 
     * @param ReflectionType $type
     * @return string
     */
    public function getTypeName(ReflectionType $type)
    {
        if ($type instanceof ReflectionNamedType) {
            return $type->getName();
        }
        return (string) $type;
    }

    /**
     * Returns declaring class.
     * 
     * @param Reflector $reflection the class to reflect
     * @return string
     */
    public function getDeclaringClass(Reflector $reflection)
    {
        $declaringClass = $reflection->getDeclaringClass();

        return $declaringClass === $reflection->class ? 'self' : $declaringClass;
    }

    /**
     * Returns class constants.
     *
     * @param Reflector $class the class to reflect
     * @return array
     */
    public function getClassConstants(Reflector $class)
    {
        $constants = [];
        foreach ($class->getConstants() as $name => $value) {
            $constant = $class->getReflectionConstant($name);
            $constants[$name] = [
                'value'       => $value,
                'modifiers'   => $this->getModifierNames($constant),
                'description' => $this->getComment($constant),
                'inherited'   => $this->getDeclaringClass($constant),
            ];
        }

        return $constants;
    }

    /**
     * Returns class properties.
     * 
     * @param Reflector $class the class to reflect
     * @return array
     */
    public function getProperties(Reflector $class)
    {
        $properties = [];
        foreach ($class->getDefaultProperties() as $name => $value) {
            $property = $class->getProperty($name);
            $comment = $this->getComment($property);
            if (preg_match('/@var\s+([^\s]+)(.*)/i', $comment, $matches)) {
                $type = $matches[1];
                $comment = trim($matches[2]);
            } else {
                $type = 'null';
            }
            $properties[$name] = [
                'type'        => $type,
                'value'       => $value,
                'modifiers'   => $this->getModifierNames($property),
                'description' => $comment,
                'inherited'   => $this->getDeclaringClass($property),
            ];
        }

        return $properties;
    }

    /**
     * Returns result of function/method.
     * 
     * @param ReflectionFunction|ReflectionMethod $function function/method
     * @return string
     */
    public function getFunctionReturn(ReflectionFunctionAbstract $function)
    {
        if ($function->hasReturnType()) {
            return $this->getTypeName($function->getReturnType());
        }

        $comment = $this->getComment($function);
        if (!empty($comment) && preg_match('/@return\s+([^\s\[]+)/ui', $comment, $matches) === 1) {
            return $matches[1];
        }

        return 'void';
    }

    /**
     * Returns parameters of function/method.
     * 
     * @param ReflectionFunction|ReflectionMethod $function function/method
     * @return array
     */
    public function getFunctionParameters(ReflectionFunctionAbstract $function)
    {
        $params = [];
        $tags = $this->getComment($function, 'param');
        foreach ($function->getParameters() as $param) {
            if ($param->isDefaultValueAvailable()) {
                if ($param->isDefaultValueConstant()) {
                    $value = 'const ' . $param->getDefaultValueConstantName();
                } else {
                    $value = $param->getDefaultValue();
                }
            } else {
                $value = null;
            }
            
            $name = $param->getName();
            $type = $comment = '';
            if ($param->hasType()) {
                $type = $this->getTypeName($param->getType());
            } elseif (isset($tags[$name])) {
                $type = $tags[$name][0];
                if (!empty($tags[$name][1])) {
                    $comment = $tags[$name][1];
                }
            }
            
            $params[$name] = [
                'type'        => $type,
                'value'       => $value,
                'description' => $comment,
                'optional'    => $param->isOptional(),
            ];
        }

        return $params;
    }

    /**
     * @param string $type
     * @return array
     */
    public function get($type)
    {
        if (!is_array($this->{$type})) {
            $this->{$type} = array_diff($this->getDeclared($type), $this->declared[$type]);
            unset($this->declared[$type]);
            foreach ($this->{$type} as $key => $name) {
                $class = new ReflectionClass($name);
                $parentClass = $class->getParentClass();
                $this->{$type}[$key] = [
                    'parent'      => $parentClass ? $parentClass->getName() : '',
                    'interfaces'  => $class->getInterfaceNames(),
                    'traits'      => $class->isInterface() ? [] : $class->getTraitNames(), 
                    'modifiers'   => $this->getModifierNames($class),
                    'description' => $this->getComment($class),
                    'constants'   => $this->getClassConstants($class),
                    'properties'  => $class->isInterface() ? [] : $this->getProperties($class),
                    'methods'     => $this->getMethods($class),
                ];
            }
        }

        return $this->{$type};
    }

    /**
     * Returns class methods.
     *
     * @param Reflector $class the class to reflect
     * @return array
     */
    public function getMethods(Reflector $class)
    {
        $methods = [];
        foreach ($class->getMethods() as $name) {
            $method = $class->getMethod($name);
            $methods[$name] = [
                'parameters'  => $this->getFunctionParameters(),
                'return'      => $this->getFunctionReturn($method),
                'modifiers'   => $this->getModifierNames($method),
                'description' => $this->getComment($method),
                'inherited'   => $this->getDeclaringClass($method),
            ];
        }
        return $methods;
    }

    /**
     * @return array
     */
    public function getConstants()
    {
        return $this->get('constants');
    }

    /**
     * @return array
     */
    public function getFunctions()
    {
        return $this->get('functions');
    }

    /**
     * @return array
     */
    public function getInterfaces()
    {
        return $this->get('interfaces');
    }

    /**
     * @return array
     */
    public function getTraits()
    {
        return $this->get('traits');
    }

    /**
     * @return array
     */
    public function getClasses()
    {
        return $this->get('classes');
    }
}

example.php

<?php
// Explore php file
$reflection = new Enso\ReflectionFile('path/to/class.php');
var_dump(
  $reflection->getConstants(),
  $reflection->getFunctions(),
  $reflection->getInterfaces(),
  $reflection->getTraits(),
  $reflection->getClasses()
);