PHP - HackMD

PHP === 無引號 : 宣告為 integer 單引號 : 宣告為 string 雙引號 : 宣告為 string 並可帶入參數 ``` //數字 integer 74 $test123 = 123; //字串 string 75 $test1 = '$test123';~ //參數 string 可帶參數 76 $test2 = "$test123";~ 77 ~ 78 dump($test1);~ 79 dump($test2);~ ``` 輸出結果 ``` BankController.php on line 78: "$test123" BankController.php on line 79: "123" ``` # set date 如何校時 sudo yum install ntp ``` Dependencies Resolved ============================================================================================================================================================================================================================================================================== Package Arch Version Repository Size ============================================================================================================================================================================================================================================================================== Installing: ntp x86_64 4.2.6p5-25.el7.centos.2 updates 547 k Installing for dependencies: autogen-libopts x86_64 5.18-5.el7 base 66 k ntpdate x86_64 4.2.6p5-25.el7.centos.2 updates 86 k Transaction Summary ============================================================================================================================================================================================================================================================================== Install 1 Package (+2 Dependent packages) Total download size: 699 k Installed size: 1.6 M Is this ok [y/d/N]: y Downloading packages: autogen-libopts-5.18-5.el7.x86 FAILED http://repo.virtualhosting.hk/centos/7.3.1611/os/x86_64/Packages/autogen-libopts-5.18-5.el7.x86_64.rpm: [Errno 14] HTTP Error 503 - Service Unavailable ] 0.0 B/s | 0 B --:--:-- ETA Trying other mirror. (1/3): ntpdate-4.2.6p5-25.el7.centos.2.x86_64.rpm | 86 kB 00:00:01 (2/3): ntp-4.2.6p5-25.el7.centos.2.x86_64.rpm | 547 kB 00:00:01 (3/3): autogen-libopts-5.18-5.el7.x86_64.rpm | 66 kB 00:00:01 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Total 489 kB/s | 699 kB 00:00:01 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : autogen-libopts-5.18-5.el7.x86_64 1/3 Installing : ntpdate-4.2.6p5-25.el7.centos.2.x86_64 2/3 Installing : ntp-4.2.6p5-25.el7.centos.2.x86_64 3/3 Verifying : ntp-4.2.6p5-25.el7.centos.2.x86_64 1/3 Verifying : ntpdate-4.2.6p5-25.el7.centos.2.x86_64 2/3 Verifying : autogen-libopts-5.18-5.el7.x86_64 3/3 Installed: ntp.x86_64 0:4.2.6p5-25.el7.centos.2 Dependency Installed: autogen-libopts.x86_64 0:5.18-5.el7 ntpdate.x86_64 0:4.2.6p5-25.el7.centos.2 Complete! [eric_tu@localhost eric_tu]$ timedatectl Local time: 五 2017-06-16 23:50:22 CST Universal time: 五 2017-06-16 15:50:22 UTC RTC time: 一 2017-06-19 06:44:26 Time zone: Asia/Taipei (CST, +0800) NTP enabled: no NTP synchronized: no RTC in local TZ: no DST active: n/a ``` chkconfig ntpd on 設定系統和 time.stdtime.gov.tw 同步 (我們以time.stdtime.gov.tw為例) ntpdate time.stdtime.gov.tw 啟動ntp service ntpd start 6.可以執行下面的指令確定目前系統的時間 date CST可以指：下列的時區：大中華地區時區北京時間，China Standard Time 中原標準時間，Chungyuan Standard Time 澳洲中部時間，Central Standard Time (Australia) 中部標準時區（北美洲），Central Standard Time (North America) 古巴標準時間，Cuba Standard Time，參見北美東部時區 --- 世界協調時間，又稱世界標準時間或協調世界時，簡稱UTC（英文「Coordinated Universal Time」／法文「Temps Universel Coordonné」），是最主要的世界時間標準，其以原子時秒長為基礎，在時刻上儘量接近於格林威治標準時間。中華民國採用CNS 7648的《資料元及交換格式–資訊交換–日期及時間的表示法》（與ISO 8601類似）稱之爲世界協調時間。中華人民共和國採用ISO 8601:2000的國家標準GB/T 7408-2005《數據元和交換格式信息交換日期和時間表示法》中亦稱之為協調世界時。 --- Xshell connect fail 解決方法: 查看shh 狀態重啟看看還是不行查IP 發現IP換了所以去xshell session重新設定。(今天網路掛了，重開之後區網IP有更動) ``` [eric_tu@localhost eric_tu]$ sudo service sshd status sudo: /var/db/sudo/eric_tu writable by non-owner (040770), should be mode 0700 We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things: #1) Respect the privacy of others. #2) Think before you type. #3) With great power comes great responsibility. [sudo] password for eric_tu: Redirecting to /bin/systemctl status sshd.service ● sshd.service - OpenSSH server daemon Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled) Active: active (running) since 一 2017-06-19 15:03:20 CST; 4min 30s ago Docs: man:sshd(8) man:sshd_config(5) Main PID: 2245 (sshd) CGroup: /system.slice/sshd.service └─2245 /usr/sbin/sshd -D 6月 19 15:03:20 localhost.localdomain systemd[1]: Starting OpenSSH server daemon... 6月 19 15:03:20 localhost.localdomain sshd[2245]: Server listening on 0.0.0.0 port 22. 6月 19 15:03:20 localhost.localdomain sshd[2245]: Server listening on :: port 22. 6月 19 15:03:20 localhost.localdomain systemd[1]: Started OpenSSH server daemon. 6月 19 15:05:47 localhost.localdomain sshd[2267]: Accepted publickey for eric_tu from 192.168.171.1 port...:d5 6月 19 15:06:19 localhost.localdomain sshd[2299]: Accepted publickey for eric_tu from 192.168.171.1 port...:d5 6月 19 15:06:35 localhost.localdomain sshd[2333]: Accepted publickey for eric_tu from 192.168.171.1 port...:d5 Hint: Some lines were ellipsized, use -l to show in full. ``` 查IP ``` [eric_tu@localhost eric_tu]$ ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:44:07:46 brd ff:ff:ff:ff:ff:ff inet 192.168.171.129/24 brd 192.168.171.255 scope global dynamic eno16777736 valid_lft 1310sec preferred_lft 1310sec inet6 fe80::20c:29ff:fe44:746/64 scope link valid_lft forever preferred_lft forever ``` # ID有動過記得要去 C:\Windows\System32\drivers\etc\hosts 設定對應的DNS MAP http://blog.miniasp.com/post/2008/08/25/Modify-hosts-file-to-change-Domain-Name-IP-Mapping.aspx --- # mysql ``` [eric_tu@localhost ~]$ mysql ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (13) ``` ``` [eric_tu@localhost ~]$ mysql -u eric_tu -h 127.0.0.1 -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 5.7.18 MySQL Community Server (GPL) Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> ``` mysql> show databases; mysql> use Msgboard; show status; ``` Remaining deprecation notices (9) Using a colon that is not followed by an indication character (i.e. " ", ",", "[", "]", "{", "}" is deprecated since version 3.2 and will throw a ParseException in 4.0: 9x 9x in BankControllerTest::testIndexAction from AppBundle\Entity ``` https://github.com/FriendsOfSymfony/FOSHttpCacheBundle/issues/343 https://github.com/FriendsOfSymfony/FOSHttpCacheBundle/commit/ddc8c148a91d40c2810181f276635e7962d13f38 --- http://blog.faq-book.com/?p=1917 https://stackoverflow.com/questions/31067135/in-centos7-can-not-start-mysql Check /etc/init.d/ for your mysql service name and then service mysql_service_name start On centos it is either: service mysqld start or for MariaDB: service mariadb start --- http://note.drx.tw/2012/12/mysql-syntax.html http://www.1keydata.com/tw/sql/sqlselect.html

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