Chat room php&mysql (6)_PHP tutorial
# Corresponding database
# phpMyAdmin MySQL-Dump
# http://phpwizard.net/phpMyAdmin/
#
# Host: localhost:3306 Database: study28
#--------------------------------------------- -----------
#
# Structure of data table 'chat_user'
#
CREATE TABLE chat_user (
userid varchar(20) NOT NULL ,
passwd varchar(20) NOT NULL,
last_time int(10) DEFAULT '0' NOT NULL,
id varchar(20) NOT NULL,
sex varchar(5) NOT NULL
);
# --------------------------------------------- ------------------
#
# Structure of data table 'chat_user_list'
#
CREATE TABLE chat_user_list (
userid int(10) DEFAULT '0' NOT NULL,
passwd varchar(20) NOT NULL,
last_time int(10) DEFAULT '0' NOT NULL,
id varchar(20) NOT NULL,
sex varchar(5) NOT NULL
);
# ------------------------- -------------------------------
#
# Structure of data table 'private_chat'
#
CREATE TABLE private_chat (
sender varchar(20) NOT NULL,
object varchar(20) NOT NULL,
message varchar(255) NOT NULL,
r1 tinyint(4 ) DEFAULT '0' NOT NULL,
r2 tinyint(4) DEFAULT '0' NOT NULL
);
# ------------- ---------------------------------------------
#
# Structure of data table 'user'
#
CREATE TABLE user (
id varchar(15) NOT NULL,
userid varchar(20) NOT NULL,
name varchar( 20) NOT NULL,
passwd varchar(20) NOT NULL,
sex varchar(5) NOT NULL,
age char(3) NOT NULL,
question varchar(20) NOT NULL,
answer varchar(20) NOT NULL,
birthday varchar(20) NOT NULL,
oicq varchar(10) NOT NULL,
height varchar(4) NOT NULL,
myphoto char(3 ) NOT NULL,
email varchar(20) NOT NULL,
homepage varchar(20) NOT NULL,
hobby varchar(40) NOT NULL,
number varchar(10) NOT NULL,
room varchar(20) NOT NULL,
department varchar(20) NOT NULL,
phone varchar(20) NOT NULL,
ready1 varchar(10) NOT NULL,
ready2 varchar(10) NOT NULL,
ready3 varchar(10) NOT NULL,
KEY id (id, userid)
);
# ----------- ---------------------------------------------
#
# Structure of data table 'user_message'
#
CREATE TABLE user_message (
userid varchar(20) NOT NULL,
object varchar(15) NOT NULL,
message varchar(255) NOT NULL,
status int(2) DEFAULT '0' NOT NULL,
action1 varchar(20) NOT NULL,
color varchar(10) DEFAULT '0' NOT NULL,
row int(10) DEFAULT '0' NOT NULL,
time1 varchar(10) NOT NULL,
id int(10) DEFAULT '0' NOT NULL
);
# -------------------------------------------------- ---------
#
# Data table structure 'user_stus'
#
CREATE TABLE user_stus (
id varchar(20) NOT NULL,
status varchar(6) NOT NULL,
date1 varchar(30) NOT NULL,
value int(5) DEFAULT '0' NOT NULL,
photo int(2) DEFAULT '0' NOT NULL ,
number int(4) DEFAULT '0' NOT NULL,
ip varchar(20) NOT NULL,
r2 char(2) NOT NULL,
r3 char(2) NOT NULL,
r4 char(2) NOT NULL,
PRIMARY KEY (id),
KEY id (id)
);

ThesecrettokeepingaPHP-poweredwebsiterunningsmoothlyunderheavyloadinvolvesseveralkeystrategies:1)ImplementopcodecachingwithOPcachetoreducescriptexecutiontime,2)UsedatabasequerycachingwithRedistolessendatabaseload,3)LeverageCDNslikeCloudflareforservin

You should care about DependencyInjection(DI) because it makes your code clearer and easier to maintain. 1) DI makes it more modular by decoupling classes, 2) improves the convenience of testing and code flexibility, 3) Use DI containers to manage complex dependencies, but pay attention to performance impact and circular dependencies, 4) The best practice is to rely on abstract interfaces to achieve loose coupling.

Yes,optimizingaPHPapplicationispossibleandessential.1)ImplementcachingusingAPCutoreducedatabaseload.2)Optimizedatabaseswithindexing,efficientqueries,andconnectionpooling.3)Enhancecodewithbuilt-infunctions,avoidingglobalvariables,andusingopcodecaching

ThekeystrategiestosignificantlyboostPHPapplicationperformanceare:1)UseopcodecachinglikeOPcachetoreduceexecutiontime,2)Optimizedatabaseinteractionswithpreparedstatementsandproperindexing,3)ConfigurewebserverslikeNginxwithPHP-FPMforbetterperformance,4)

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl


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