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正則表達(dá)式中的特殊字符

: 1. .: 匹配任意單個(gè)字符(除了換行符) 2. *: 匹配前面元字符0次或者多次 3. +: 匹配前面元字符1次或者多次 4. ?: 匹配前面元字符0次或者1次 5. ^: 匹配字符串的開(kāi)始 6. $: 匹配字符串的結(jié)束 7. (): 匹配括號(hào)內(nèi)的表達(dá)式，也表示一個(gè)組 8. |: 表示或者的關(guān)系 9. \: 用于轉(zhuǎn)義字符 10. []: 用于指定一組字符中的某一個(gè)

Public @ 2023-02-24 02:36:15

域名對(duì)品牌有哪些影響？

域名對(duì)品牌有以下幾個(gè)方面的影響： 1. 影響品牌知名度一個(gè)好的域名能幫助公司更容易被人們記住和搜索，增加品牌知名度和曝光度。 2. 影響品牌信任度一個(gè)與品牌相關(guān)的域名可以增加品牌的信任度和可信度，并讓客戶(hù)更愿意與品牌建立聯(lián)系和交易。 3. 影響品牌聲譽(yù) 域名的歷史和背景可能會(huì)影響品牌聲譽(yù)，如遭受黑客攻擊或有涉嫌違法行為的歷史。 4. 影響品牌傳播效果域名的易用性和可記性影響品

Public @ 2023-04-24 22:00:20

網(wǎng)站設(shè)計(jì)的基本步驟和方法

網(wǎng)站，指的是在互聯(lián)網(wǎng)上用于展示內(nèi)容的相關(guān)網(wǎng)頁(yè)的集合。網(wǎng)站是由域名、網(wǎng)站源程序和網(wǎng)站空間三部分構(gòu)成。網(wǎng)站空間由專(zhuān)門(mén)的服務(wù)器或虛擬主機(jī)承擔(dān)；網(wǎng)站源程序則放在網(wǎng)站空間里面，表現(xiàn)為網(wǎng)站前臺(tái)和網(wǎng)站后臺(tái)。互聯(lián)網(wǎng)上的網(wǎng)站五花八門(mén)，盡管這些網(wǎng)站在內(nèi)容方面有很大的差異，它們的客戶(hù)對(duì)象也不一樣，但都遵循著一個(gè)基本的設(shè)計(jì)流程，即規(guī)劃、設(shè)計(jì)、開(kāi)發(fā)、發(fā)布和維護(hù)。按照這幾個(gè)階段一步一步地往下做，便可以打造出屬于自己的商業(yè)網(wǎng)站

Public @ 2022-07-02 15:45:16

正則表達(dá)式中的特殊字符

字符/意義：對(duì)于字符，通常表示按字面意義，指出接著的字符為特殊字符，不作解釋。例如：/b/匹配字符’b’,通過(guò)在b 前面加一個(gè)反斜杠，也就是/b/，則該字符變成特殊字符，表示匹配一個(gè)單詞的分界線(xiàn)?；蛘撸簩?duì)于幾個(gè)字符，通常說(shuō)明是特殊的，指出緊接著的字符不是特殊的，而應(yīng)該按字面解釋。例如：*是一個(gè)特殊字符，匹配任意個(gè)字符(包括0個(gè)字符)；例如：/a*/意味匹配0個(gè)或多個(gè)a。為了匹配字面上的*，在a前面

Public @ 2010-02-14 16:14:32

正則表達(dá)式中的特殊字符

正則表達(dá)式中常用的特殊字符包括： 1. ^ : 匹配輸入字符串的開(kāi)始位置 2. $ : 匹配輸入字符串的結(jié)束位置 3. . : 匹配除換行符外的任意字符 4. * : 匹配前面的字符零個(gè)或多個(gè) 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個(gè)字符 8. [^] : 匹配不在字符集中的任意一個(gè)字符 9. () : 分組，可以使用

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

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[ DB ] CONNECT:[ UseTime:0.019623s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.014205s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 5589 LIMIT 1 [ RunTime:0.013239s ]
[ 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:0.013613s ]
[ 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:0.013867s ]
[ 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:0.013852s ]
[ 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` = 5589 LIMIT 1 [ RunTime:0.013234s ]
[ 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+1 where id=5589 [ RunTime:0.014153s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海網(wǎng)站建設(shè)' AND `status` <> -1 LIMIT 1 [ RunTime:0.020317s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海網(wǎng)站建設(shè)' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.041310s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海正則表達(dá)式' AND `status` <> -1 LIMIT 1 [ RunTime:0.020362s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海正則表達(dá)式' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.037840s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

0.385583s

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正則表達(dá)式中的特殊字符

域名對(duì)品牌有哪些影響？

網(wǎng)站設(shè)計(jì)的基本步驟和方法

正則表達(dá)式中的特殊字符

正則表達(dá)式中的特殊字符

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