What is the syntax difference between PHP and Java?

What is the syntax difference between PHP and Java?

1. There are 8 basic data types in Java and corresponding reference types. PHP has no reference types;

2. There are method overloading under a class in Java. PHP Only methods of the parent class can be overloaded;

3. Java has the concept of internal classes, but PHP does not.

Other subtle differences

1.PHP is a scripting language, the code is executed on the server, and the results are returned to the browser in plain text.

2.PHP can run on a variety of different platforms: such as windows, linux, MaxOS, etc.

3.PHP scripts can be stored anywhere in the document, starting with .

4.PHP comments: PHP supports three comment methods:

A. Double slashes, for example: //This is to declare a variable

B.# symbol, for example : #This is to declare a variable

C./**/ For example: /*This is to declare a variable*/

Java also supports three comment methods:

A. Double slashes, for example: //This is to declare a variable

B./**/ For example: /*This is to declare a variable*/

C./***/ For example: /***This is to declare a variable*/

5. Case sensitivity issue in PHP: In PHP, all user-defined functions, classes and keywords (such as if, else, echo, etc.) are not case-sensitive, while variables are case-sensitive. of.

In Java, all function names, keywords, classes, variables, etc. are case-sensitive.

6. PHP variable declaration: PHP is similar to Javascript. Both are reference types, and there is no need to specify the type when declaring. Java is a strong reference type, and its type must be specified when declaring.

The way to declare variables in PHP is: $X = 7; Note: The naming rules for java and PHP variables are the same.

7. The scope of variables in PHP:

A. global (global): can only be accessed outside the function

B. Local (local): Can only be accessed within the method body

　C.static (static)

Global variables in Java are allowed to be accessed within the method.

8.global keyword: You can use the global keyword in the function body to access global variables.

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