get variable type

In PHP because variables do not need to be defined in advance, we have a lot of time for the PHP variable type is cheek paste, but PHP gives us the GetType () function to get the variable type, he can judge all the variable types in PHP. Detecting

Answer the question in the previous section first. 01 02 $foo= 10; 03 $bar= 20; 04   05

Answer the question in the previous section first. Copy Code code as follows: $foo = 10; $bar = 20; function Change () { Global $foo; echo ' function internal $foo = '. $foo. ' '; If the $bar is not defined as a

#一, PHP variable definition: Variables are used to store values, such as numbers, text strings or arrays, V: string/integer/double/array/object Naming rules: 1. The variable name of PHP is case-sensitive. 2. The variable name must begin with $3,

In the first version of iOS:We declare both the property and the underlying instance variable for the output, when the property is a new mechanism for the OC language, and you must declare the instance variable that corresponds to it, for

JavaScript is a weakly typed language, which is a typical example of a variable that can be assigned to any type when it is used. So let's take a look at JavaScript, which has a way of using these variable types already.Let's take a look at the

JavaScript is a weakly typed language, which is a typical example of a variable that can be assigned to any type when it is used. So let's take a look at JavaScript, which has a way of using these variable types already. Let's take a look at the

The scope of a variable Second, the storage type of the variable Description: This C language topic is the prelude to learning iOS development. And for programmers with an object-oriented language development experience, you can

Blockchain is a complex and complex discipline that combines cryptography, consensus algorithms, intelligent contracts, and super-ledgers. Yun Jong said that the quality of the teachers in the blockchain training institutions and their perceived

One, what is deferred environment variable extension? Delay variable Full name "Delay environment variable extension", to understand this thing, we have to understand what is called variable expansion!When we explain our command, CMD will first