PHP (Hypertext Preprocessor) is a widely used server-side programming language that is widely used in website development, dynamic web design and other WEB application scenarios. Dart is an emerging programming language launched by Google in 2011 to replace JavaScript and is widely used in web and mobile application development. This article will introduce you to the basics of PHP and Dart, and provide some learning suggestions.
1. PHP Getting Started Guide
- Overview of PHP
PHP is a server-side scripting language that runs on a Web server and can generate dynamic Web page content. It is fast, flexible, and easy to learn. It is a simple and easy-to-use programming language.
- Basic syntax of PHP
PHP code blocks are identified by <?php
and ?>
.
Use the echo statement to output the variable content. For example:
<?php $name = "Tom"; echo "Hello".$name."!"; ?>
PHP variables start with the $ symbol and can store any type of value.
- Learning Suggestions
If you want to learn PHP, you can start from the following aspects:
(1) Learn basic syntax, understand data types, Basic concepts such as operators, control structures, functions, etc.;
(2) Learn MySQL database related knowledge and master database connection, query, update and other operations;
(3) Try to implement a simple Web Applications, such as personal blogs, message boards, etc.;
(4) Learn common PHP frameworks, such as Laravel, Yii, CodeIgniter, etc., and quickly build web applications.
2. Dart Getting Started Guide
- Dart Overview
Dart is an object-oriented programming language, initiated and promoted by Google, for the Web Application development, server-side development, mobile application development, etc. It is fast, flexible, and efficient, and is particularly suitable for developing large-scale web applications.
- Basic syntax of Dart
Dart language code blocks are identified by curly braces {}.
Use the print statement to output the variable content. For example:
void main() { String name = "Tom"; print("Hello, $name!"); }
Dart variables start with keywords such as var, int, double, String, bool, etc., and can store any type of value.
- Learning Suggestions
If you want to learn Dart, you can start from the following aspects:
(1) Learn basic syntax, understand data types, Basic concepts such as operators, control structures, classes and objects;
(2) Learn the Flutter framework and master the application of Dart language in mobile application development;
(3) In-depth study of object-oriented Advanced knowledge such as programming and asynchronous programming;
(4) Try to implement simple web applications, such as personal blogs, message boards, etc.
3. Summary
PHP and Dart are widely used programming languages and are of great significance to Web and mobile application development. Learning PHP can help us quickly implement web applications; learning Dart can help us develop efficient and modern applications. For people with a certain programming foundation, it is not difficult to learn these two programming languages. They only require continuous study and practice to master them.
The above is the detailed content of Getting Started with PHP: PHP and Dart. For more information, please follow other related articles on the PHP Chinese website!

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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