Many examples exist within the Reflection documentation, typically within the __construct documentation for each class.
Example #1 Reflection Example from Shell (a Terminal)
$ php --rf strlen $ php --rc finfo $ php --re json $ php --ri dom
The above example will output something similar to:
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> $depth ]
}
}
Function [ <internal:json> function json_last_error ] {
- Parameters [0] {
}
}
}
}
dom
DOM/XML => enabled
DOM/XML API Version => 20031129
libxml Version => 2.7.3
HTML Support => enabled
XPath Support => enabled
XPointer Support => enabled
Schema Support => enabled
RelaxNG Support => enabled
If you want to use method closures and don't have PHP 5.3, perhaps you find useful the following function
<?php
function get_method_closure($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'
?>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;
?>