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This article mainly introduces "what is the difference between php and JavaScript". In daily operation, I believe that many people have doubts about the difference between php and JavaScript. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the questions of "what is the difference between php and JavaScript?" Next, please follow the editor to study!

1. The basic characteristics of the two are different:

Php is a general open source scripting language, a server-side language. Grammar absorbs the characteristics of C language, Java and Perl, which is convenient for learning and widely used. It is mainly suitable for the field of Web development.

Js is a scripting language belonging to the network, a client language, has been widely used in Web application development, often used to add a variety of dynamic functions to web pages, to provide users with a more smooth and beautiful browsing effect. Usually JavaScript scripts implement their own functions by embedding them in HTML.

2. String concatenator

The string concatenator for php is: "."

The string concatenator for JavaScript is "+"

3. Array addition

Php array addition: "+", which can be added directly

JavaScript uses the splicing function: concat ()

4. Case sensitivity

Php: only variable names are case sensitive

_ JavaScript: all case-sensitive

5. Declare variables

Php: variable declaration with: "$variable name"

_ JavaScript: variable declaration: "var variable name"

6. on the resolution mechanism of single quotation marks and double quotation marks

Php: double quotes can parse special characters, including variables. Not single quotation marks.

_ JavaScript: there is no difference between single and double quotes.

7. Differences in real parameters.

In javascript, there is no limit to the number of parameters and arguments, and the number of parameters can be greater or less than the number of arguments.

In php, an error will be reported if the real parameter is less than the formal parameter, because some parameters are defined but not used, which may affect the function of the function in the PHP interpretation mechanism.

8. Variable values are passed in different ways:

In js, the passing of value and address of a variable is determined by the type of object passed, and cannot be controlled at will.

And all types in php are free to control whether the value is passed or addressed. Adding & before the variable can become the addressing mode, and not adding & is the way of passing value.

9. the core functions of the two are different:

The core function in php is implemented in a functional way, such as getting the length of a string: $length = strlen (str)

Js is implemented using object methods, such as getting the length of a string: var length = str.length.

At this point, the study of "what is the difference between php and JavaScript" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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