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PHP inserts mysql Data to implement multi-host mutual lock instances and mysql instances

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PHP inserts mysql Data to implement multi-host mutual lock instances and mysql instances

This article describes how PHP inserts mysql Data to implement multi-host lock. The specific implementation method is as follows:

You can add a general lock before executing the process. The shell yoke function is as follows. If it succeeds, 0 is returned; otherwise, a non-0 value is returned:

Copy codeThe Code is as follows: function get_lock ()
{
Local dataId = "$ {1 }"
Local dataDate = "$ {2 }"

Local SQL = "insert into t_trans_lock
(DataId, dataDate) values ('$ {dataId}', '$ {dataDate }');"
Echo $ {SQL} | $ {DB_PUBLIC}

Return $?
}

Release the lock when execution fails or ends.
Copy codeThe Code is as follows: function free_lock ()
{
Local dataId = "$ {1 }"
Local dataDate = "$ {2 }"
Local status = "$ {3 }"

Local SQL = "delete from t_trans_lock
Where dataId = '$ {dataId}' and dataDate = '$ {dataDate }';"
Echo $ {SQL} | $ {DB_PUBLIC}
If [$? -Ne 0]; then
Write_log $ {dataId} "free lock failed"
Fi
Return $ {status}
}

I hope this article will help you design the PHP + MySQL program.


A simple example of database insertion/reading in PHP

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "www.w3.org/..al.dtd">
<Html xmlns = "www.w3.org/5o/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Title> untitled document </title>
</Head>

<Body>
<? Php

If (isset ($ _ POST ['tj ']) // if you click Submit
{

$ Conn = mysql_connect ("localhost", "username", "password ");
Mysql_select_db ("eastses", $ conn );
Mysql_query ("set names utf8", $ conn );
Date_default_timezone_set ("asia/chongqing ");
$ SQL = "INSERT INTO 'asts '. 'classmat' ('id', 'name', 'nickname', 'birthday', 'home', 'blood ', 'qq', 'weibo', 'email ', 'Phone ', 'hoby', 'food', 'sentence', 'giput', 'lover ', 'keenon', 'Unforgettable', 'wanttobecome', 'ideal ', 'other') VALUES ('". $ _ POST ['id']. "','". $ _ POST ['name']. "','". $ _ POST ['nickname']. "','". $ _ POST ['birthday']. "','". $ _ POST ['home']. "','". $ _ POST ['blood ']. "','". $ _ POST ['qq'] ...... remaining full text>

Php implements a simple registration page and inserts registration information into the mysql database.

Registration page: reg.html

<Form action = "reg. php" method = "POST">
<Table>
<Tr> <td> User name: </td> <input type = "username" size = "20"> </td> </tr>
<Tr> <td> password: </td> <input type = "userpass" size = "20"> </td> </tr>
<Tr> <td> Confirm Password: </td> <input type = "ruserpass" size = "20"> </td> </tr>
<Tr> <td> email: </td> <input type = "email" size = "50"> </td> </tr>
<Tr> <td> Tel: </td> <input type = "telphone" size = "20"> </td> </tr>
<Tr> <td> <input type = "Submit" value = "register"> </td> </tr>
</Table>
</Form>

Receiving page: reg. php
<% Php
$ Db = mysql_connect ("localhost", "root", "12345 ");
Mysql_select_db ("dataname", $ db );
Mysql_query ("insert into tablename (username, userpass, email, telphone) values ('$ _ POST [username]', '$ _ POST [userpass]', '$ _ POST [email]', '$ _ POST [telphone]') ");
Echo "registration successful ";
%>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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