PHPのお勉強！

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PHP 8.4.2 Released!

    例

    リフレクションのドキュメントの中には多くの例が示されています。 特に、各クラスの __construct のドキュメントを見るといいでしょう。

    例1 シェル (ターミナル) からのリフレクションの例

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

    上の例の出力は、 たとえば以下のようになります。

    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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    User Contributed Notes 2 notes

    up
    17
    Kovin
    15 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
    13 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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