Table of Contents
Welcome to my home page
Home Backend Development PHP Tutorial 和大家分享一下小弟我学php的前两个小时成绩(适合菜鸟)(散分)

和大家分享一下小弟我学php的前两个小时成绩(适合菜鸟)(散分)

Jun 13, 2016 am 10:00 AM
echo gt lt php returns

和大家分享一下我学php的前两个小时成绩(适合初学者)(散分)
学习自:

PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->http://www.w3school.com.cn/php/
Copy after login

1.php 文件必须是:
语句在这里写
?>
2.echo 输出函数 方法:echo “abc”
3.定义变量:$变量名 = 变量值
4.两个变量联合输出用“.”连接 例如:echo $变量1.变量2
5.strlen()函数是表示 变量值的长度 
 例如echo strlen(“Hello world!”);输出12
6.strpos()函数表示检索字符串 查找字符串在某个字符串中的位置
7.运算符
算数运算符
运算符 说明 例子 结果
+ Addition x=2
x+2 4
- Subtraction x=2
5-x 3
* Multiplication x=4
x*5 20
/ Division 15/5
5/2 3
2.5
% Modulus (division remainder) 5%2
10%8
10%2 1
2
0
++ Increment x=5
x++ x=6
-- Decrement x=5
x-- x=4
赋值运算符
运算符 说明 例子
= x=y x=y
+= x+=y x=x+y
-= x-=y x=x-y
*= x*=y x=x*y
/= x/=y x=x/y
.= x.=y x=x.y
%= x%=y x=x%y
比较运算符
运算符 说明 例子
== is equal to 5==8 returns false
!= is not equal 5!=8 returns true
> is greater than 5>8 returns false
>= is greater than or equal to 5>=8 returns false
逻辑运算符
运算符 说明 例子
&& and x=6
y=3 
(x 1) returns true
|| or x=6
y=3 
(x==5 || y==5) returns false
! not x=6
y=3 
!(x==y) returns true

8.函数date("D");时间函数 返回当天信息
9.定义集合:$name = array(“刘文成”,”程海燕”,”myPHP”);
10.for循环
PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->$i=0;    for($i=1;i”;}
Copy after login

11.foreach 循环
PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->$arr = array(“one”,”two”,”three”);    foreach($arr as $value){    echo “我变了集合项目”.$value}
Copy after login

12.函数定义关键字:function
PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php function w(){    echo “liuwencheng”;}echo “我的名字是:”;w();?>
Copy after login

13.function w($name1,$name2)--=>放参数
14.在函数中return用于返回值
15.$_POST[“name”]或者$_GET[“name”]是获得表单提交的值
16. $_COOKIE[“name”]获得cookie的值
17.$_REQUEST[“name”]包含了$_POST $_GET $_COOKIE
18.data(format,timesamp);
函数含义:时间
参数含义:format:必须,规定时间的格式
Timesamp
例子:echo data(“y/m/d”) ;
echo data(“y.m.d”);
echo data(“y-m-d”);
以上输出:
2006/07/11
2006.07.11
2006-07-11
19. mktime(hour,minute,second,month,day,year,is_dst)
函数含义:时间点
Is_dst是可选参数 其他参数可选
20.include(“head.php”)函数
设置 head.php 文件为页眉文件
例如:
PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php include("header.php"); ?><h1 id="Welcome-to-my-home-page">Welcome to my home page</h1><p>Some text</p>
Copy after login

21.require(“head.php”)函数
与include()函数几乎一样 只是错误的处理方式不一样
include除了错还会执行后面的php代码 而require则立即返回
22.fopen();在php页面中打开文件
参数有两个:参数a为文件路径
参数b问文件打开模式
这里面对参数b进行解释:
“r” --=>只读,在文件的开头开始
“r+”--=>读写,在文件的卡头开始
“w”--=>只写,打开文件并清空文件内容,如果不存在文件则创建
“w+”--=>读/写,打开文件并清空文件内容,如果不存在文件则创建
“a”--=>追加,打开文件并向文件末端进行写操作,如果文件不存在则创建新文件
“a+”--=>读/追加,向文件末端写内容,并保持文件
“x”--=>只写 创建文件,如果文件存在则返回false
“x+”--=>读/写。创建文件 如果文件已存在,则返回false和一个错误
注释*:如果fopen()无法打开指定的文件则发挥0(false)
例子1:$file=fopen(“D:/abc.txt”,”r”);
例子2:$file=fopen(“D:/abc.txt”,”r”) or exit(“unable to open file!”);
  注:此例子如果文件无法打开则弹出消息
23.feof($file)用来检索是否已经达到文件末端
注释:在权限为:w, a, x, 时是无法打开文件的
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

See all articles