야쿠이야기

PHP 버전, PHP7, PHP5,6, PHP 5.5 기존 Value of variable ($var)isset($var)empty($var)is_null($var)“” (an empty string)bool(true)bool(true)” ” (space)bool(true)FALSEbool(true)bool(true)TRUEbool(true)array() (an empty array)bool(true)bool(true)NULLbool(true)bool(true)“0” (0 as a string)bool(true)bool(true)0 (0 as an integer)bool(true)bool(true)0.0 (0 as a float)bool(true)bool(true)var $var; (a variable ..