CourseElementary54121

Course Introduction："HTML5 From Beginner to Mastery Tutorial" introduces in detail that HTML5 has added a lot of new content based on HTML, with more functions and more dazzling effects.

CourseElementary26924

Course Introduction："Javascript Basics Tutorial" will take you to quickly learn the basic knowledge of javascript and explain it through examples, so that you can better understand the javascript scripting language.

CourseElementary30784

Course Introduction：This tutorial will start from the basics and does not require you to have any programming knowledge. The "HTML Tutorial" contains our knowledge of HTML5, truly achieving a comprehensive learning of HTML.

CourseElementary24050

Course Introduction："HTML5 Quick Self-Study Tutorial" is suitable for zero-based entry learning of HTML5. HTML5 is the fifth version of HTML development. With the support of browser technology, it has also begun to be widely used. H5 will become the new standard for WEB development. This course will provide readers with Explain all the core features of HTML5.

CourseElementary90662

Course Introduction："JavaScript Elementary Tutorial" is an introductory course to JavaScript, designed to let everyone know and understand the common knowledge of JavaScript.

Course Introduction：The difference between PHP's isset() and empty(): empty() determines whether a variable is "empty", and isset() determines whether a variable has been set. empty also checks whether the variable is empty or zero. When a variable value is 0, empty() considers the variable to be equal to empty, which is equivalent to no setting.

2019-10-09 comment 01940

Course Introduction：The php empty() function is used to check whether a variable is empty. The syntax of this function is "bool empty (mixed $var)", where the parameter "$var" represents the variable to be checked.

2021-05-19 comment 02235

Course Introduction：The PHPempty() function is a very commonly used function, used to determine whether a variable is empty. In PHP programming, using the empty() function can very conveniently determine whether a variable is empty to avoid errors during program runtime. First of all, the empty() function has the following characteristics: The empty() function can accept one parameter, which is the variable or expression to be judged. The empty() function returns a Boolean value, true if the variable is empty, false otherwise. The following variables are

2023-06-27 comment 01586

Course Introduction：The difference between isset() and empty() in php is: isset() function is used to detect whether the variable is set, the syntax format is: [isset (mixed var)]; empty() function is used to determine whether the value is empty, the syntax format It is: [empty(mixed var)].

2020-06-29 comment 04487

Course Introduction：There has been a lot of discussion about the usage of PHP's empty(), isset() and is_null() functions, and a lot of information may not be very clear. I repeat it here again, but instead of talking about it conceptually, I use a program example directly...

2017-04-05 comment 01036