PHP 8.4.0 RC2 available for testing

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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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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