PHP Programming/Reserved words

PHP words List of the 72 reserved words by alphabetical order: __CLASS__ __DIR__ __FILE__ __FUNCTION__ __LINE__ __METHOD__ __NAMESPACE__ abstract and array() as break case catch cfunction ''(PHP 4)'' class clone const continue declare default die() do echo() else elseif empty() enddeclare endfor endforeach endif endswitch endwhile eval() exit() explode() extends final for foreach function global goto if implements include_once() include() instanceof interface isset() list() namespace new old_function ''(PHP 4)'' or print() private protected public require_once() require() return() split() ''(PHP < 5.3)'' static switch throw try unset() use var while xor PHP7 news Several composed operators can reduce the usual syntax: ??: null coalescing operator. Equivalent to a ternary operator with an is_null(). <=>: spaceship operator. Equivalent to a switch with three cases: inferior, equal and superior. intdiv(): integer division. Equivalent to / + intval(). Moreover, we can now use: several classes in the same use declaration. define() to set an array of constants. Extensions List of the 48 native PHP 5.5.0 libraries with EasyPHP: Core PDO Phar Reflection SPL SimpleXML apache2handler bcmath bz2 calendar ctype curl date dom ereg filter ftp gd hash iconv json libxml mbstring mcrypt mhash mysql mysqli mysqlnd odbc openssl pcre pdo_mysql pdo_sqlite pdo_sqlsrv session sockets sqlite3 sqlsrv standard tokenizer wddx xdebug xml xmlreader xmlwriter xsl zip zlib