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正则表达式中的特殊字符

正则表达式中常用的特殊字符包括： 1. ^ : 匹配输入字符串的开始位置 2. $ : 匹配输入字符串的结束位置 3. . : 匹配除换行符外的任意字符 4. * : 匹配前面的字符零个或多个 5. + : 匹配前面的字符一次或多次 6. ? : 匹配前面的字符零次或一次 7. [] : 匹配字符集中的任意一个字符 8. [^] : 匹配不在字符集中的任意一个字符 9. () : 分组，可以使用 | 或者 () 来构造复杂的正则表达式 10. \ : 转义字符，可以将特殊字符转义为普通字符以上是常见的特殊字符，不同的编程语言和正则表达式引擎可能会有略微的差异。

Public @ 2023-04-25 19:00:14

十大建站开源程序

威海网站建设威海CMS
2145

1. WordPress（https://wordpress.org） 2. Joomla（https://www.joomla.org） 3. Drupal（https://www.drupal.org） 4. Magento（https://magento.com） 5. Django CMS（https://www.django-cms.org） 6. OpenCart（https://ww

Public @ 2023-07-22 06:00:11

什么是域名解析？

威海网站建设威海dns
1307

域名解析是将一个域名（例如google.com）转换为其对应的IP地址的过程。因为计算机和网络设备只能使用IP地址来定位和访问其他设备，而不是使用域名。所以，在访问一个网站时，计算机首先会查询域名解析器（通常是DNS服务器），以获取该域名对应的IP地址，然后使用该地址访问该网站。

Public @ 2023-06-18 14:00:09

经典正则表达式

以下是一些经典的正则表达式： 1. 匹配邮箱地址 ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ 2. 匹配手机号码 ^1[3456789]\d{9}$ 3. 匹配 URL ^(http|https)://[a-zA-Z0-9]+\.[a-zA-Z]+(/[a-zA-Z0-9]+)*$ 4. 匹配身份证号码 ^[1-9]\d{5}(

Public @ 2023-04-10 08:50:39

经典正则表达式

（1）验证邮箱： ^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$ （2）验证身份证： ^\d{15}|\d{18}$ （3）验证电话号码： ^0\d{2,3}-\d{5,9}$

Public @ 2023-03-02 12:48:07

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[ DB ] CONNECT:[ UseTime:0.021632s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_config` [ RunTime:0.015501s ]
[ SQL ] SELECT * FROM `ob_config` [ RunTime:0.014608s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_config', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 25, 'extra' => NULL, ) ]
[ SQL ] SHOW COLUMNS FROM `ob_hook` [ RunTime:0.015489s ]
[ SQL ] SELECT `id`,`name`,`addon_list` FROM `ob_hook` [ RunTime:0.014410s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_hook', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 3, 'extra' => NULL, ) ]
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.015788s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 7751 LIMIT 1 [ RunTime:0.014615s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.014816s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.015005s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.015417s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 7751 LIMIT 1 [ RunTime:0.014512s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+2 where id=7751 [ RunTime:0.015421s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站建设' AND `status` <> -1 LIMIT 1 [ RunTime:0.021651s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站建设' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.042259s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海正则表达式' AND `status` <> -1 LIMIT 1 [ RunTime:0.023016s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海正则表达式' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.032195s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

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