<?php $varName = 'hello'; $var_name = 'hello'; $varname = 'hello'; $_varName = 'hello'; $varname2 = 'hello'; class MyClass { $varName = 'hello'; $var_name = 'hello'; $varname = 'hello'; $_varName = 'hello'; $varName2 = 'hello'; public $varName = 'hello'; public $var_name = 'hello'; public $varname = 'hello'; public $_varName = 'hello'; public $varName2 = 'hello'; protected $_varName = 'hello'; protected $_var_name = 'hello'; protected $_varname = 'hello'; protected $varName = 'hello'; protected $_varName2 = 'hello'; private $_varName = 'hello'; private $_var_name = 'hello'; private $_varname = 'hello'; private $varName = 'hello'; private $_varName2 = 'hello'; } echo $varName; echo $var_name; echo $varname; echo $_varName; echo $varName2; echo "Hello $varName"; echo "Hello $var_name"; echo "Hello $varname"; echo "Hello $_varName"; echo "Hello $varName2"; echo 'Hello '.$varName; echo 'Hello '.$var_name; echo 'Hello '.$varname; echo 'Hello '.$_varName; echo 'Hello '.$varName2; echo $_SERVER['var_name']; echo $_REQUEST['var_name']; echo $_GET['var_name']; echo $_POST['var_name']; echo $GLOBALS['var_name']; echo $GLOBALS['var_name2']; echo MyClass::$varName; echo MyClass::$var_name; echo MyClass::$varname; echo MyClass::$_varName; echo MyClass::$varName2; echo $this->varName; echo $this->var_name; echo $this->varname; echo $this->_varName; echo $this->varName2; echo $object->varName; echo $object->var_name; echo $object->varName2; echo $object_name->varname; echo $object_name->_varName; echo $object_name->varName2; echo $this->myFunction($one, $two); echo $object->myFunction($one_two, $var2); $error = "format is \$GLOBALS['$varName']"; $error = "format is \$GLOBALS['$varName2']"; echo $_SESSION['var_name']; echo $_FILES['var_name']; echo $_ENV['var_name']; echo $_COOKIE['var_name']; echo $_COOKIE['var_name2']; $XML = 'hello'; $myXML = 'hello'; $XMLParser = 'hello'; $xmlParser = 'hello'; $xmlParser2 = 'hello'; echo "{$_SERVER['HOSTNAME']} $var_name"; $someObject->{$name}; $someObject->my_function($var_name); var_dump($http_response_header); var_dump($HTTP_RAW_POST_DATA); var_dump($php_errormsg); interface Base { protected $anonymous; public function __construct(); } $anonClass = new class() { public function foo($foo, $_foo, $foo_bar) { $bar = 1; $_bar = 2; $bar_foo = 3; } }; echo $obj?->varName; echo $obj?->var_name; echo $obj?->varName; enum SomeEnum { public function foo($foo, $_foo, $foo_bar) { $bar = 1; $_bar = 2; $bar_foo = 3; } }