PHP5.3废弃函数 替代记
?call_user_method()
(使用 call_user_func()
替代)
????call_user_method_array()
(使用 call_user_func_array()
替代)
????define_syslog_variables()
????dl()
????ereg()
(使用 preg_match()
替代)
????ereg_replace()
(使用 preg_replace()
替代)
????eregi()
(使用 preg_match()
配合 ‘i’ 修正符替代)
????eregi_replace()
(使用 preg_replace()
配合 ‘i’ 修正符替代)
????set_magic_quotes_runtime()
以及它的别名函数??magic_quotes_runtime()
????session_register()
(使用 $_SESSION
超全部变量替代)
????session_unregister()
(使用 $_SESSION 超全部变量
替代)
????session_is_registered()
(使用 $_SESSION 超全部变量
替代)
????set_socket_blocking()
(使用 stream_set_blocking()
替代)
????split()
(使用 preg_split()
替代)
????spliti()
(使用 preg_split()
配合 ‘i’ 修正符替代)
????sql_regcase()
????mysql_db_query()
(使用 mysql_select_db()
和??mysql_query()
替代)
????mysql_escape_string()
(使用 mysql_real_escape_string()
替代)
????废弃以字符串传递区域设置名称. 使用 LC_*
系列常量替代.
????mktime()
的 is_dst
参数. 使用新的时区处理函数替代.
涉及到的主要的函数迁移如下:
删除函数 define_syslog_variables 引用删除对函数 define_syslog_variables 的引用将变量 $LOG_ERR, $LOG_USER 等用常量 LOG_USER, LOG_USER, … 替代
ereg, eregi
函数用 preg_match
函数替代这几个函数的函数声明int ereg ( string$pattern , string $string [, array
&$regs ] ) int eregi ( string $pattern , string $string [, array
&$regs ] ) intpreg_match ( string $pattern , string $subject [,
array &$matches [, int $flags [, int $offset ]]]
)虽然三者的第一个参数都是字符串,表示一个正则表达式,但是 preg_match 用的是 PCRE(Perl 兼容的正则表达式语法):正则表达式的两端用一个符号做边界,如 “/pattern/” 或者 “#pattern#”
,eregi 是乎略大小写的匹配,转换为 preg_match,第一个参数,用PCRE的参数来乎略大小写,如:”/pattern/i” 或者 “#pattern#i”
,
两者的第三个参数返回的匹配的数据结构不同。ereg
的第三个参数在调用结束后,返回的是一个字符串数组,分别为完整匹配字串和各个子匹配字串。preg_match 返回的是二维数组,相当于 ereg
的字串数组中的字串在 preg_match 是一个数组,分别保存匹配值以及匹配位置。如果要进行多次匹配,PHP 提供了
preg_match_all 函数,其第三个参数的返回值则是一个三维数组.
ereg_replace, eregi_replace
函数用 preg_replace
函数或者 str_replace 函数来替代和前面的 ereg 替换为 preg_match
类似,第一个参数要进行转换,头尾增加一个符号,如:”/pattern/” 或者 “#pattern#”, …eregi_replace 到
preg_replace 的替换,在第一个参数的后面增加正则表达式参数。如:”/pattern/i” 或者 “#pattern#i”, …如果
ereg_replace 的第一个参数不是正则表达式,可以用 str_replace 直接来替换。
spliti
函数用 explode
或则 preg_split
函数替代split 切分字符串,如果无须用到正则表达式,使用 explode 替换是最好不过,速度最快.
对于使用正则表达式切分字串,则使用 preg_split 函数替代。替代过程和 ereg/ereg_replace 类似,只是在第一个正则表达式参数中做文章,将 split 的正则表达式前后加上一个 PCRE 的分隔符号。

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The server session failure can be solved through the following steps: 1. Check the server configuration to ensure that the session is set correctly. 2. Verify client cookies, confirm that the browser supports it and send it correctly. 3. Check session storage services, such as Redis, to ensure that they are running normally. 4. Review the application code to ensure the correct session logic. Through these steps, conversation problems can be effectively diagnosed and repaired and user experience can be improved.

session_start()iscrucialinPHPformanagingusersessions.1)Itinitiatesanewsessionifnoneexists,2)resumesanexistingsession,and3)setsasessioncookieforcontinuityacrossrequests,enablingapplicationslikeuserauthenticationandpersonalizedcontent.


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