php - final 关键字

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<?phpfinal class Sources{// userinput variablespublic static $V_USERINPUT = array('$_GET','$_POST','$_COOKIE','$_REQUEST','$_FILES','$_SERVER','$_ENV','$HTTP_GET_VARS','$HTTP_POST_VARS','$HTTP_COOKIE_VARS',  '$HTTP_REQUEST_VARS', '$HTTP_POST_FILES','$HTTP_SERVER_VARS','$HTTP_ENV_VARS','$HTTP_RAW_POST_DATA','$argc','$argv');public static $V_SERVER_PARAMS = array('HTTP_ACCEPT','HTTP_ACCEPT_LANGUAGE','HTTP_ACCEPT_ENCODING','HTTP_ACCEPT_CHARSET','HTTP_CONNECTION','HTTP_HOST','HTTP_KEEP_ALIVE','HTTP_REFERER','HTTP_USER_AGENT','HTTP_X_FORWARDED_FOR',// all HTTP_ headers can be tainted'PHP_AUTH_DIGEST','PHP_AUTH_USER','PHP_AUTH_PW','AUTH_TYPE','QUERY_STRING','REQUEST_URI', // partly urlencoded'PATH_INFO','ORIG_PATH_INFO','PATH_TRANSLATED','PHP_SELF');// file content as inputpublic static $F_FILE_INPUT = array('bzread','dio_read','exif_imagetype','exif_read_data','exif_thumbnail','fgets','fgetss','file', 'file_get_contents','fread','get_meta_tags','glob','gzread','readdir','read_exif_data','scandir','zip_read');// database content as inputpublic static $F_DATABASE_INPUT = array('mysql_fetch_array','mysql_fetch_assoc','mysql_fetch_field','mysql_fetch_object','mysql_fetch_row','pg_fetch_all','pg_fetch_array','pg_fetch_assoc','pg_fetch_object','pg_fetch_result','pg_fetch_row','sqlite_fetch_all','sqlite_fetch_array','sqlite_fetch_object','sqlite_fetch_single','sqlite_fetch_string');// other functions as inputpublic static $F_OTHER_INPUT = array('get_headers','runkit_superglobals','import_request_variables');//'getenv' and 'apache_getenv' // will be automatically added if 'putenv' or 'apache_setenv' with userinput is found}?>

PHP 5 新增了一个 final 关键字。如果父类中的方法被声明为 final，则子类无法覆盖该方法。如果一个类被声明为 final，则不能被继承。

Note: 属性不能被定义为 final，只有类和方法才能被定义为 final。

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http://www.php.net/manual/zh/language.oop5.final.php

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