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锟斤拷锟杰大部凤拷锟斤拷锟叫碉拷 PHP 5 锟斤拷锟诫不锟斤拷要锟轿何改憋拷涂锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷校锟斤拷锟斤拷锟阶拷锟揭恍╋拷锟斤拷锟斤拷锟斤拷莸谋锟斤拷锟斤拷

• 锟斤拷锟斤拷支锟斤拷 锟斤拷全模式 锟斤拷锟轿猴拷锟斤拷锟斤拷锟斤拷全模式锟斤拷应锟斤拷锟节帮拷全锟斤拷锟芥都锟斤拷要锟斤拷锟叫碉拷锟斤拷锟斤拷
• 锟狡筹拷 魔锟斤拷锟斤拷锟斤拷 锟斤拷为锟斤拷锟斤拷锟斤拷职锟饺拷锟斤拷猓拷锟斤拷锟斤拷锟斤拷锟斤拷缘锟接︼拷每锟斤拷锟斤拷锟揭拷锟斤拷锟斤拷锟� get_magic_quotes_gpc() 锟斤拷 get_magic_quotes_runtime() 锟斤拷锟斤拷锟斤拷锟角凤拷锟斤拷 FALSE 锟斤拷 锟斤拷锟斤拷 set_magic_quotes_runtime() 锟斤拷锟斤拷锟斤拷一锟斤拷 E_CORE_ERROR 锟斤拷锟斤拷拇锟斤拷锟�
• register_globals 锟斤拷 register_long_arrays php.ini 指锟筋被锟狡筹拷锟斤拷
• 锟斤拷锟斤拷时锟斤拷锟斤拷锟矫达拷锟斤拷 锟斤拷锟狡筹拷锟斤拷
• break 锟斤拷 continue 锟斤拷洳伙拷俳锟斤拷芸杀锟斤拷锟斤拷锟斤拷 锟斤拷锟界： break 1 + foo() * $bar; 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 break 2; 锟斤拷锟斤拷锟侥固讹拷锟斤拷锟斤拷锟皆匡拷使锟矫★拷锟杰此变化影锟届，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� break 0; 锟斤拷 continue 0; 锟斤拷
• 锟斤拷 锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷展 锟叫ｏ拷锟斤拷锟斤拷支锟斤拷时锟斤拷使锟斤拷 TZ锟斤拷TimeZone锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫★拷锟斤拷锟斤拷使锟斤拷 date.timezone php.ini 锟斤拷锟斤拷选锟斤拷锟� date_default_timezone_set() 锟斤拷锟斤拷锟斤拷指锟斤拷时锟斤拷锟斤拷PHP 锟斤拷锟斤拷锟劫筹拷锟皆猜诧拷时锟斤拷锟斤拷锟斤拷锟角伙拷锟剿碉拷"UTC"锟斤拷锟斤拷锟斤拷一锟斤拷 E_WARNING 锟斤拷锟斤拷
• 锟斤拷锟斤拷锟街碉拷锟街凤拷锟斤拷偏锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 $a['foo'] 锟剿达拷 $a 锟斤拷一锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷 isset() 时锟斤拷锟斤拷 false锟斤拷使锟斤拷 empty() 时锟斤拷锟斤拷 true锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷 E_WARNING 锟斤拷锟斤拷偏锟斤拷锟斤拷锟斤拷锟斤拷锟角诧拷锟斤拷锟斤拷 null 锟斤拷锟斤拷锟揭伙拷锟� E_NOTICE 锟斤拷锟斤拷 锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷 $a['2'] 锟斤拷锟斤拷锟斤拷锟斤拷前一锟斤拷锟斤拷锟叫★拷注锟斤拷锟斤拷锟斤拷锟斤拷 '12.3' 锟斤拷 '5 foobar' 锟斤拷锟斤拷锟斤拷偏锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟街诧拷锟斤拷锟斤拷一锟斤拷 E_WARNING 锟斤拷锟襟，碉拷锟斤拷为锟斤拷锟斤拷锟捷碉拷原锟斤拷锟斤拷锟角会被锟街憋拷转锟斤拷锟斤拷 12 锟斤拷 5 锟斤拷 注锟解：锟斤拷锟叫达拷锟诫返锟截诧拷同锟侥斤拷锟斤拷锟� $str='abc';var_dump(isset($str['x'])); // 锟斤拷 PHP 5.4 锟斤拷锟斤拷掳姹撅拷锟斤拷锟� false锟斤拷锟斤拷锟斤拷 PHP 5.3 锟斤拷锟斤拷桶姹撅拷锟斤拷锟� true
• 锟斤拷锟斤拷转锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷 E_NOTICE 锟斤拷锟斤拷拇锟斤拷螅锟斤拷锟斤拷氐慕锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷 "Array" 锟斤拷
• NULL 锟斤拷FALSE 锟斤拷锟斤拷 一锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷映锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷一锟斤拷 E_WARNING 锟斤拷锟斤拷拇锟斤拷螅锟斤拷锟斤拷锟� E_STRICT 锟斤拷
• 锟斤拷锟节诧拷锟斤拷锟斤拷使锟斤拷全锟街憋拷锟斤拷锟斤拷锟结导锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟襟。斤拷止锟斤拷锟斤拷 function foo($_GET, $_POST) {} 锟斤拷锟斤拷锟侥达拷锟诫。
• Salsa10 锟斤拷 Salsa20 锟斤拷希锟姐法 锟斤拷锟狡筹拷锟斤拷
• 锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷时锟斤拷 array_combine() 锟斤拷锟节凤拷锟斤拷 array() 锟斤拷锟斤拷锟斤拷 FALSE 锟斤拷
• htmlentities() 锟斤拷锟斤拷 htmlspecialchars() 一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷前 PHP 锟芥本锟侥达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诮锟斤拷岱拷锟揭伙拷锟� E_STRICT 锟斤拷锟斤拷
• 强锟揭斤拷锟介不要锟斤拷使锟斤拷 eregi() 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰版本锟叫憋拷锟狡筹拷锟斤拷

锟斤拷锟叫关硷拷锟斤拷锟斤拷锟节憋拷 锟斤拷锟斤拷 锟斤拷锟揭诧拷锟斤拷锟斤拷锟节猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

• trait
• callable
• insteadof

锟斤拷锟叫猴拷锟斤拷锟窖达拷 PHP 锟斤拷锟狡筹拷锟斤拷

• define_syslog_variables()
• import_request_variables()
• session_is_registered() 锟斤拷 session_register() 锟皆硷拷 session_unregister() 锟斤拷
• 锟斤拷锟斤拷 mysqli_bind_param() 锟斤拷 mysqli_bind_result() 锟斤拷 mysqli_client_encoding() 锟斤拷 mysqli_fetch() 锟斤拷 mysqli_param_count() 锟斤拷 mysqli_get_metadata() 锟斤拷 mysqli_send_long_data() 锟斤拷 mysqli::client_encoding() 锟皆硷拷 mysqli_stmt::stmt() 锟斤拷