PHP 8.3.27 Released!

    Примеры

    В документации по Reflection вы сможете встретить множество примеров, чаще всего в описании конструкторов классов.

    Пример #1 Пример использования Reflection из shell (терминала)

    $ php --rf strlen
$ php --rc finfo
$ php --re json
$ php --ri dom

    Вывод приведённого примера будет похож на: 

    Function [ <internal:Core> function strlen ] {

  - Parameters [1] {
    Parameter #0 [ <required> $str ]
  }
}

Class [ <internal:fileinfo> class finfo ] {

  - Constants [0] {
  }

  - Static properties [0] {
  }

  - Static methods [0] {
  }

  - Properties [0] {
  }

  - Methods [4] {
    Method [ <internal:fileinfo, ctor> public method finfo ] {

      - Parameters [2] {
        Parameter #0 [ <optional> $options ]
        Parameter #1 [ <optional> $arg ]
      }
    }

    Method [ <internal:fileinfo> public method set_flags ] {

      - Parameters [1] {
        Parameter #0 [ <required> $options ]
      }
    }

    Method [ <internal:fileinfo> public method file ] {

      - Parameters [3] {
        Parameter #0 [ <required> $filename ]
        Parameter #1 [ <optional> $options ]
        Parameter #2 [ <optional> $context ]
      }
    }

    Method [ <internal:fileinfo> public method buffer ] {

      - Parameters [3] {
        Parameter #0 [ <required> $string ]
        Parameter #1 [ <optional> $options ]
        Parameter #2 [ <optional> $context ]
      }
    }
  }
}

Extension [ <persistent> extension #23 json version 1.2.1 ] {

  - Constants [10] {
    Constant [ integer JSON_HEX_TAG ] { 1 }
    Constant [ integer JSON_HEX_AMP ] { 2 }
    Constant [ integer JSON_HEX_APOS ] { 4 }
    Constant [ integer JSON_HEX_QUOT ] { 8 }
    Constant [ integer JSON_FORCE_OBJECT ] { 16 }
    Constant [ integer JSON_ERROR_NONE ] { 0 }
    Constant [ integer JSON_ERROR_DEPTH ] { 1 }
    Constant [ integer JSON_ERROR_STATE_MISMATCH ] { 2 }
    Constant [ integer JSON_ERROR_CTRL_CHAR ] { 3 }
    Constant [ integer JSON_ERROR_SYNTAX ] { 4 }
  }

  - Functions {
    Function [ <internal:json> function json_encode ] {

      - Parameters [2] {
        Parameter #0 [ <required> $value ]
        Parameter #1 [ <optional> $options ]
      }
    }
    Function [ <internal:json> function json_decode ] {

      - Parameters [3] {
        Parameter #0 [ <required> $json ]
        Parameter #1 [ <optional> $assoc ]
        Parameter #2 [ <optional> $depth ]
      }
    }
    Function [ <internal:json> function json_last_error ] {

      - Parameters [0] {
      }
    }
  }
}

dom

DOM/XML => enabled
DOM/XML API Version => 20031129
libxml Version => 2.7.3
HTML Support => enabled
XPath Support => enabled
XPointer Support => enabled
Schema Support => enabled
RelaxNG Support => enabled

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    Примечания пользователей 2 notes

    up
    17
    Kovin
    16 years ago
    If you want to use method closures and don't have PHP 5.3, perhaps you find useful the following function
    <?php
    function get_method_closure($object,$method_name){
    if(    method_exists(get_class($object),$method_name)){
    $func = create_function( '',
    '
    $args = func_get_args();
    static $object = NULL;

    /*
    * Check if this function is being called to set the static $object, which
    * containts scope information to invoke the method
    */
    if(is_null($object) && count($args) && get_class($args[0])=="'    .get_class($object).'"){
    $object = $args[0];
    return;
    }

    if(!is_null($object)){
    return call_user_func_array(array($object,"'    .$method_name.'"),$args);
    }else{
    return FALSE;
    }'
    );

    //Initialize static $object
    $func($object);

    //Return closure
    return $func;
    }else{
    return     false;
    }
    }
    ?>
    Here is how you would use it:
    <?php
    class foo{
    public function     bar($foo){
    return     strtolower($foo);
    }
    }

    $foo = new foo();
    $f = get_method_closure($foo,'bar');
    echo     $f("BAR");//Prints 'bar'
    ?>
    up
    11
    spectrum at bigmir dot net
    14 years ago
    Simple table generation using Reflection:

    <?php

    class A
    {
    public     $name = 'Vasiliy';
    public     $text = 'Once upon a time';
    }

    class     B
    {
    public     $name = 'Had bought a cat';
    public     $text = 'named Valentine';
    }

    class     grid
    {
    public function     build( $dataSource, $headers, $fields )
    {
    $result = '<table border="1">';
    $result .= $this -> make_head( $headers );

    foreach (    $dataSource as $source):
    $class_name = get_class($source);
    if (     $class_name != FALSE ):
    $reflector = new ReflectionClass($source);
    echo     'Class "'. $class_name .'" found.<br />';
    $result .= $this -> make_row( $reflector, $fields, $source );
    endif;
    endforeach;

    $result .= '</table>';
    return     $result;
    }

    private function     make_head( $headers )
    {
    $result = '<tr>';
    foreach (     $headers as $header):
    $result .= "<th>$header</th>";
    endforeach;
    $result .= '</tr>';
    return     $result;
    }

    private function     make_row( $reflector, $fields, $source )
    {
    $result = '<tr>';
    foreach (     $fields as $field ):
    if (     $reflector -> hasProperty($field) ):
    $property = $reflector -> getProperty($field);
    $result .= '<td>'. $property -> getValue($source) .'</td>';
    endif;
    endforeach;
    $result .= '</tr>';
    return     $result;
    }
    }

    $A = new A;
    $B = new B;
    $C = 'Test';

    $dataSource = array( $A, $B, $C );
    $headers = array( 'H1', 'H2' );
    $fields = array( 'name', 'text' );

    $grid = new grid;
    $table = $grid -> build( $dataSource, $headers, $fields );
    echo     $table;

    ?>
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