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HomeBackend DevelopmentPHP Tutorialphp5.3x不再支持ereg和eregi,解决方法

php5.3x不再支持ereg和eregi,解决办法
自己目前在从事PHP程序员,网站方向的.之前遇到不少PHP的函数被弃用了,主要是PHP版本问题(PHP5.3.x),为了更好的向 PHP 的未来版本(PHP6) 过渡,将未来不再支持的函数标记为 DEPRECATED.在代码中使用这些函数,将毫不留情的在页面中显示警告信息:"使用了过时的函数…",这些配置将在 PHP6中不再存在,相关功能也将关闭
下面列举了部分被弃用的函数:
    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()
    [color=olive]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()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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