The ReflectionExtension class

<?php
// The demonstration for the class "ReflectionExtension".
function REData(ReflectionExtension $re, $return=false) {
 defined('UNDEFINED') || define('UNDEFINED','%undefined%');
 $_data = [];
 $_data['getName:'] = $re->getName() ?: UNDEFINED;
 $_data['getVersion:'] = $re->getVersion() ?: UNDEFINED;
 $_data['info:'] = $re->info() ?: UNDEFINED;
 $_data['getClassName:'] = PHP_EOL.implode(", ",$re->getClassNames()) ?: UNDEFINED; 
 foreach ($re->getConstants() as $key => $value) $_data['getConstants:'] .= "\n{$key}:={$value}";
 $_data['getDependencies:'] = $re->getDependencies() ?: UNDEFINED;
 $_data['getFunctions:'] = PHP_EOL.implode(", ",array_keys($re->getFunctions())) ?: UNDEFINED;
 $_data['getINIEntries:'] = $re->getINIEntries() ?: UNDEFINED;
 $_data['isPersistent:'] = $re->isPersistent() ?: UNDEFINED;
 $_data['isTemporary:'] = $re->isTemporary() ?: UNDEFINED;
 return print_r($_data, $return);
}
REData( new ReflectionExtension( 'Reflection' ) );
REData( new ReflectionExtension( 'zlib' ) );
// Reflection
// Reflection => enabled
// Version => $Id: 60f1e547a6dd00239162151e701566debdcee660 $
/*
Array
(
 [getName:] => Reflection
 [getVersion:] => $Id: 60f1e547a6dd00239162151e701566debdcee660 $
 [info:] => %undefined%
 [getClassName:] =>
ReflectionException, Reflection, Reflector, ReflectionFunctionAbstract, Reflecti
onFunction, ReflectionParameter, ReflectionMethod, ReflectionClass, ReflectionOb
ject, ReflectionProperty, ReflectionExtension, ReflectionZendExtension
 [getDependencies:] => %undefined%
 [getFunctions:] =>
 [getINIEntries:] => %undefined%
 [isPersistent:] => 1
 [isTemporary:] => %undefined%
)
*/
// zlib
// ZLib Support => enabled
// Stream Wrapper => compress.zlib://
// Stream Filter => zlib.inflate, zlib.deflate
// Compiled Version => 1.2.7
// Linked Version => 1.2.7
// Directive => Local Value => Master Value
// zlib.output_compression => Off => Off
// zlib.output_compression_level => -1 => -1
// zlib.output_handler => no value => no value
/*
Array
(
 [getName:] => zlib
 [getVersion:] => 2.0
 [info:] => %undefined%
 [getClassName:] =>
 [getConstants:] =>
FORCE_GZIP:=31
FORCE_DEFLATE:=15
ZLIB_ENCODING_RAW:=-15
ZLIB_ENCODING_GZIP:=31
ZLIB_ENCODING_DEFLATE:=15
 [getDependencies:] => %undefined%
 [getFunctions:] =>
readgzfile, gzrewind, gzclose, gzeof, gzgetc, gzgets, gzgetss, gzread, gzopen, g
zpassthru, gzseek, gztell, gzwrite, gzputs, gzfile, gzcompress, gzuncompress, gz
deflate, gzinflate, gzencode, gzdecode, zlib_encode, zlib_decode, zlib_get_codin
g_type, ob_gzhandler
 [getINIEntries:] => Array
 (
 [zlib.output_compression] =>
 [zlib.output_compression_level] => -1
 [zlib.output_handler] =>
 )
 [isPersistent:] => 1
 [isTemporary:] => %undefined%
)
*/

<?php
 // Create an instance of the ReflectionProperty class
 $ext= new ReflectionExtension('standard');
 // Print out basic information
 printf(
 "Name : %s\n".
 "Version : %s\n".
 "Functions : [%d] %s\n".
 "Constants : [%d] %s\n".
 "INI entries : [%d] %s\n",
 $ext->getName(),
 $ext->getVersion() ? $ext->getVersion() : 'NO_VERSION',
 sizeof($ext->getFunctions()),
 var_export($ext->getFunctions(), 1),
 sizeof($ext->getConstants()),
 var_export($ext->getConstants(), 1),
 sizeof($ext->getINIEntries()),
 var_export($ext->getINIEntries(), 1)
 );
?>