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在反射文档中存在很多例子,通常位于每个类的 __construct 文档中。
Example #1 Shell 里的一个反射例子(一个终端)
$ php --rf strlen $ php --rc finfo $ php --re json $ php --ri dom
以上例程的输出类似于:
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] { } } } }domDOM/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
[#1] spectrum at bigmir dot net [2010-12-28 02:11:39]
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 $table;
?>
[#2] Kovin [2009-05-18 14:00:03]
If you want to use method closures and don't have PHP 5.3, perhaps you find useful the following function
<?php
function get_method_closure($object,$method_name){
if(method_exists(get_class($object),$method_name)){
$func = create_function( '',
'
$args = func_get_args();
static $object = NULL;
if(is_null($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'
?>