How to get method comments in php

php Get the comments of the method: first open the corresponding PHP file; then get the documentation comments of the class through the reflection mechanism in php; finally get the comments of the method by getting all its methods.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

php reflection acquisition class and method Comment

Get the documentation comments of the class through the reflection mechanism in php, and then get the comments of the method by getting all its methods

The main classes and methods used

ReflectionClass
ReflectionClass::getDocComment
ReflectionClass::getMethods
 
$method->getName()
$method->getDocComment();
$method->isProtected();
$method->getParameters();
 
$param->getName();
$param->isDefaultValueAvailable();
$param->getDefaultValue()

The test class is as follows:

test.php

<?php
header("Content-type: text/html; charset=utf-8");
require_once dir(__DIR__).&#39;function.php&#39;;
require_once dir(__DIR__).&#39;TestClass.php&#39;;
 
$class_name = &#39;TestClass&#39;;
 
$reflection = new ReflectionClass ( $class_name );
//通过反射获取类的注释
$doc = $reflection->getDocComment ();
//解析类的注释头
$parase_result =  DocParserFactory::getInstance()->parse ( $doc );
$class_metadata = $parase_result;
 
//输出测试
var_dump ( $doc );
echo "\r\n";
print_r( $parase_result );
echo "\r\n-----------------------------------\r\n";
 
//获取类中的方法，设置获取public,protected类型方法
$methods = $reflection->getMethods(ReflectionMethod::IS_PUBLIC + ReflectionMethod::IS_PROTECTED + ReflectionMethod::IS_PRIVATE);
//遍历所有的方法
foreach ($methods as $method) {
    //获取方法的注释
    $doc = $method->getDocComment();
    //解析注释
    $info = DocParserFactory::getInstance()->parse($doc);
    $metadata = $class_metadata +  $info;
    //获取方法的类型
    $method_flag = $method->isProtected();//还可能是public,protected类型的
    //获取方法的参数
    $params = $method->getParameters();
    $position=0;    //记录参数的次序
    foreach ($params as $param){
        $arguments[$param->getName()] = $position;
        //参数是否设置了默认参数，如果设置了，则获取其默认值
        $defaults[$position] = $param->isDefaultValueAvailable() ? $param->getDefaultValue() : NULL;
        $position++;
    }
 
    $call = array(
        &#39;class_name&#39;=>$class_name,
        &#39;method_name&#39;=>$method->getName(),
        &#39;arguments&#39;=>$arguments,
        &#39;defaults&#39;=>$defaults,
        &#39;metadata&#39;=>$metadata,
        &#39;method_flag&#39;=>$method_flag
    );
    print_r($call);
    echo "\r\n-----------------------------------\r\n";
}

function.php [Recommended learning: "PHP Video Tutorial"]

<?php
require_once dir(__DIR__).&#39;DocParser.php&#39;;
 
/**
 * 解析doc
 * 下面的DocParserFactory是对其的进一步封装，每次解析时，可以减少初始化DocParser的次数
 *
 * @param $php_doc_comment
 * @return array
 */
function parse_doc($php_doc_comment) {
    $p = new DocParser ();
    return $p->parse ( $php_doc_comment );
}
 
/**
 * Class DocParserFactory 解析doc
 *
 * @example
 *      DocParserFactory::getInstance()->parse($doc);
 */
class DocParserFactory{
 
    private static $p;
    private function DocParserFactory(){
    }
 
    public static function getInstance(){
        if(self::$p == null){
            self::$p = new DocParser ();
        }
        return self::$p;
    }
 
}

TestClass.php

<?php
/**
 * A test class  在此处不能添加@ur,@param,@return 注释
 *  如果要将类的注释和方法的注释合并的话，添加了上面的注释，会将方法中的注释给覆盖掉
 */
class TestClass {
    /**
     * @desc 获取public方法
     *
     * @url GET pnrs
     * @param array $request_data
     * @return int id
     */
    public function getPublicMethod($no_default,$add_time = &#39;0000-00-00&#39;) {
        echo "public";
    }
    /**
     * @desc 获取private方法
     *
     * @url GET private_test
     * @return int id
     */
    private function getPrivateMethod($no_default,$time = &#39;0000-00-00&#39;) {
        echo "private";
    }
 
    /**
     * @desc 获取protected方法
     *
     * @url GET protected_test
     * @param $no_defalut,$time
     * @return int id
     */
    protected function getProtectedMethod($no_default,$time = &#39;0000-00-00&#39;) {
        echo "protected";
    }
}

DocParser.php This class comes from an open source project

<?php
/**
 * Parses the PHPDoc comments for metadata. Inspired by Documentor code base
 * @category   Framework
 * @package    restler
 * @subpackage helper
 * @author     Murray Picton <info@murraypicton.com>
 * @author     R.Arul Kumaran <arul@luracast.com>
 * @copyright  2010 Luracast
 * @license    http://www.gnu.org/licenses/ GNU General Public License
 * @link       https://github.com/murraypicton/Doqumentor
 */
class DocParser {
    private $params = array ();
    function parse($doc = &#39;&#39;) {
        if ($doc == &#39;&#39;) {
            return $this->params;
        }
        // Get the comment
        if (preg_match ( &#39;#^/\*\*(.*)\*/#s&#39;, $doc, $comment ) === false)
            return $this->params;
        $comment = trim ( $comment [1] );
        // Get all the lines and strip the * from the first character
        if (preg_match_all ( &#39;#^\s*\*(.*)#m&#39;, $comment, $lines ) === false)
            return $this->params;
        $this->parseLines ( $lines [1] );
        return $this->params;
    }
    private function parseLines($lines) {
        foreach ( $lines as $line ) {
            $parsedLine = $this->parseLine ( $line ); // Parse the line
            
            if ($parsedLine === false && ! isset ( $this->params [&#39;description&#39;] )) {
                if (isset ( $desc )) {
                    // Store the first line in the short description
                    $this->params [&#39;description&#39;] = implode ( PHP_EOL, $desc );
                }
                $desc = array ();
            } elseif ($parsedLine !== false) {
                $desc [] = $parsedLine; // Store the line in the long description
            }
        }
        $desc = implode ( &#39; &#39;, $desc );
        if (! empty ( $desc ))
            $this->params [&#39;long_description&#39;] = $desc;
    }
    private function parseLine($line) {
        // trim the whitespace from the line
        $line = trim ( $line );
        
        if (empty ( $line ))
            return false; // Empty line
        
        if (strpos ( $line, &#39;@&#39; ) === 0) {
            if (strpos ( $line, &#39; &#39; ) > 0) {
                // Get the parameter name
                $param = substr ( $line, 1, strpos ( $line, &#39; &#39; ) - 1 );
                $value = substr ( $line, strlen ( $param ) + 2 ); // Get the value
            } else {
                $param = substr ( $line, 1 );
                $value = &#39;&#39;;
            }
            // Parse the line and return false if the parameter is valid
            if ($this->setParam ( $param, $value ))
                return false;
        }
        
        return $line;
    }
    private function setParam($param, $value) {
        if ($param == &#39;param&#39; || $param == &#39;return&#39;)
            $value = $this->formatParamOrReturn ( $value );
        if ($param == &#39;class&#39;)
            list ( $param, $value ) = $this->formatClass ( $value );
        
        if (empty ( $this->params [$param] )) {
            $this->params [$param] = $value;
        } else if ($param == &#39;param&#39;) {
            $arr = array (
                    $this->params [$param],
                    $value 
            );
            $this->params [$param] = $arr;
        } else {
            $this->params [$param] = $value + $this->params [$param];
        }
        return true;
    }
    private function formatClass($value) {
        $r = preg_split ( "[\(|\)]", $value );
        if (is_array ( $r )) {
            $param = $r [0];
            parse_str ( $r [1], $value );
            foreach ( $value as $key => $val ) {
                $val = explode ( &#39;,&#39;, $val );
                if (count ( $val ) > 1)
                    $value [$key] = $val;
            }
        } else {
            $param = &#39;Unknown&#39;;
        }
        return array (
                $param,
                $value 
        );
    }
    private function formatParamOrReturn($string) {
        $pos = strpos ( $string, &#39; &#39; );
        
        $type = substr ( $string, 0, $pos );
        return &#39;(&#39; . $type . &#39;)&#39; . substr ( $string, $pos + 1 );
    }
}

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