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53 Essentials to improve PHP programming efficiency

times times slower than parsing a static HTML page. Use static HTML pages as much as possible and use fewer scripts. 27. Unless the script can be cached, it will be recompiled every time it is called. Introducing a set of PHP caching mechanisms can typically improve performance by 25% to 100% to eliminate compilation overhead. 28, try to do the cache, you can use memcached. The memcached is a high-performance memory object caching system that can be used to accelerate dynamic Web applications a

20 Essentials of PHP programming efficiency

character, rather than write a line of code to accept the array as the query and replace parameters.13. Use the Select Branch statement (that is, switch case) better than using multiple if,else if statements.14. Masking error messages with @ is extremely inefficient and extremely inefficient.15, open the Apache mod_deflate module, can improve the browsing speed of the page.16, the database connection should be turned off when used, do not use long connection.17. Error messages are costly.18, in

20 Essentials of PHP programming efficiency

Apache mod_deflate module, can improve the browsing speed of the page.16, the database connection should be turned off when used, do not use long connection.17. Error messages are costly.18, increment the local variable in the method, the speed is the quickest. is almost equivalent to the speed at which local variables are called in the function.19, incrementing a global variable is twice times slower than incrementing a local variable.20, incrementing an object property (such as: $this->prop++

Unity3d Layer Essentials

|1=1, which is 1 1), in turn to determine whether a LAYERMASK has a specified mask as long as the use of Operations ( For binary and operation, 01=0,10=0,11=1,00=0, which is 0 0), determines whether the result of the operation is the mask value. For example 0x10010x1000=0x1000, you can determine that the mask value of 0x1001 contains the mask value of 0x1000. This is how unity's 3 layers are represented. You can use unity-provided methods of layermask operations, known as Layermask, for mutual

Basic JavaScript essentials

output content.Custom functions (can also be seen as a method)JavaScript needs to define a function before it can call a function. Defining a function in JavaScript consists of a keyword function, a function name, a set of parameters, and a pending JavaScript statement that is placed in parentheses.Grammar:1 Function name (parameter 1, parameter 2, Parameter 3,...) 2{3 4 [ return value]5 }Calling functionsGrammar:Event name = "function name ()";anonymous functions  Because th

CSS Learning Essentials

GoalMaster the basic CSS syntax, learn how to apply CSS to HTML elements and be familiar with CSS for element layout.Points The basic concept of CSS, the meaning of existenceCSS refers to cascading style sheets (cascading style Sheets), which defines how HTML elements are displayed, and CSS solves the problem of separating content from performance, greatly improving work efficiency. Various ways to define style information and priority Browser default settings Exte

The. NET Developer Essentials Toolkit

, rapid code corrections, one-step completion of code formatting and cleanup, Industry-leading automated code refactoring, advanced integrated unit testing scenarios, and powerful solution navigation and search. ozcode--If you are a C # developer, then you need to ozcode. It has raised the concept of visual debugging to a new height, showing the loops, expressions, and comparison arrays visually. Web essentials--is a great tool developed by Microsoft

Linux and Windows dual-system Installation Essentials

: Display all the disks of this machine, in order to operate the target disk correctly, select disk No. 0, clear all partitions on disk No. 0, create primary partition, capacity: 512000MB, activate primary partition, quickly format current partition, create extended partition, create logical partition one, Capacity: 512000MB; Quickly format the current partition, create logical partition Two, capacity: 512000MB, quickly format the current partition, create logical partition three, the size of th

WIN10 Development Essentials Tool: Visual Studio 2015 official edition download

The latest news from the wee hours of July 21, the free trial version of the Visual Studio 2015 integrated development tool for VW users has been launched. This article summarizes the Simplified Chinese Community Edition, the Professional Edition and the Enterprise Edition online installation as well as the ISO offline installation image. Visual Studio Community 2015 Simplified Chinese version(Community Edition, free for individuals):Http://download.microsoft.com/download/B/4/8/B4870509-05CB-447

CSP: Parsing X509 certificate Essentials with CryptoAPI

type, which calls Certnametostr () to the final string. The specific implementation functions are as follows:ULONG Ccspcertificate::get_subjectname (LPSTR lpvalue, ULONG *pullen) {DWORD Dwsubjectlen = 0; Cert_name_blob certsubject;if (!m_pcertcontext) {return cert_err_invilidcall;} if (!pullen) {return cert_err_invalidparam;} Certsubject = M_pcertcontext->pcertinfo->subject;dwsubjectlen = Certnametostr (GLOBAL_ENCODING_TYPE, Certsubject, Cert_x500_name_str, NULL, 0); if (Dwsubjectlen Viii. Per

"C #" chapter 3rd Learning Essentials (iii)--usage of common classes and structures

Category: C #, VS2015Date Created: 2016-06-19Use of teaching materials: (Twelve-Five National planning Materials) "C # Program design and Application Course" (3rd edition) I. DateTime structure and TimeSpan structureDateTime represents the date and time, in the range of January 1, 01 midnight 12:00:00 to December 31, 9999, 11:59:59, and the minimum time unit equals 100ns.A timespan represents a time interval that spans between Int64.minvalue and Int64.maxvalue. Second, stopwatch and timer (Stopw

"C #" 1.2 Console Application Learning Essentials

namespace instead of the precompiled instruction, which results in the same effect as outputting debug information using precompiled directives. For example:System.Diagnostics.Debug.WriteLine ("OK");I prefer to use this method to achieve.Regardless of which of the two methods described above, the function is "only in the debug state" to output the corresponding information. In other words, it executes the corresponding statement only when you press Third, inputTypical usage Examples:string s =

Servlet+jsp Essentials

(URL)Forward the same Request object used before and after the jump page , so the value passed to the previous page can also be used by the page after the jump. While response.sendredirect uses different objects, the parameters passed to the previous page cannot be used5.3 Jsp:usebean, you can Use a well-defined Beanin your JSP. Do not use naked classes, packaging. When used, deploy the packaged files to the classes folder underneath the web-inf folder . scope:page, request,session, applicat

RxJava development essentials 2-why is it Observables?

RxJava development essentials 2-why is it Observables?Why is it Observables? In the object-oriented architecture, developers are committed to creating a group of decoupled entities. In this way, entities can be tested, reused, and maintained without interfering with the entire system. Designing such a system brings about a tricky negative impact: maintaining consistency between related objects. In the Smalltalk MVC Architecture, the first example of t

Python Learn the first chapter essentials

indented in the control format, the next level of code indents four spaces to the right, and the IDE tool indents four spaces by tapping the TAB key.5. Conditional Judgment and circulationConditional judgmentIfElifElseExecution order from top to bottom, when if and elif are not satisfied, do elseCycleWhileKeyword True cannot be used when a variable is assigned a valueWhile:else:For:else:The else is executed when the loop exits normally, and if the loop is an unhealthy exit, such as break, the f

Java Essentials 07 Package

path (.) In the search package. The human class can be found in Java from/home/vamei/javapackage, and the Testagain class can be found from.Alternatively, you can set the system's CLASSPATH environment variable to add the above path to the variable without typing the-classpath option each time. Package-like mechanisms are also common in other languages, such as the import mechanism in Python. They are all designed to better organize and use existing programs. Using the package, we can easily ex

I genius official free tutorial 41: Java Essentials thread deadlock

class object to 8this.setpriority (8);}} Package thread.priority;/** * Create Child threads * @author Genius Federation-Yukun */public class Sonthread extends Fatherthread {public static void Main (string[] args) {//Create Sonthread object and invoke the Start method with the created object to start the thread new Sonthread (). Start (); @Overridepublic void Run () {/* * uses the keyword this to call the GetPriority method, gets the priority of the current thread * and System.out.println the pr

Three Web site Production essentials

pages, like a person, can be divided into different parts of the body. If you want the highlights of the Web page to be noticed by the user, then the user has really noticed, how to say? Like a beautiful woman on the street, when you see her, her body always has a part to give you the impression of a special deep, the web is the same truth, your Web page needs like this beauty, there is a place to the user's impression is particularly profound.Third: pop-up windowMany web page creators like to

Python Beginner Essentials Exercise 4---Develop a calculator program

[index]= calc_res #print '--->string Tolist: ',string_to_list #print ' +> ', Index,re.split (' [*,/] ', i) ' Operators=re.findall (' [*,/] ', i) data= re.split (' [*,/] ', i) combine_to_one_list=map (none,data,operators) combine_to_one_list=re.split ("[\[,\],\ (,)," ', None] ", str (combine_to_one_list)) combine_to_one_list= ". Join (Combine_to_one_list). Split () print '-',combine_to_one_list #print operators,data ' ' #caculate_1 (combine_to_one_list) else: ifnagative_mark: data_aft

Unity3d Project Development Hot Essentials Plugin

/18464Top-down Assets MobileTop-down Assets Mobile settings include approximately - Models of the environment: shrubs, trees, trunks, modular ruins, modular buildings, lots of hand-map textures, ground, and some particle effects. the average number of drawcall on the screen is 30-90 and 20-40k TrisOfficial Address: https://www.assetstore.unity3d.com/en/#!/content/5860FX Maker fx Maker applies to unity 3.5.3 300 effects, 300 100 100 fx Maker contains 300 prefabs mesh , le

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