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If, elseif, and else statements are used to execute different actions based on different conditions.Condition StatementWhen writing code, you often need to perform different actions for different judgments.You can use conditional statements in the
If
(PHP 4, PHP 5)
The IF structure is one of the most important features in many languages, including PHP, which allows code snippets to be executed on a conditional basis. The IF structure of PHP is similar to the C language:
As defined in the
In php, if else or switch statements are used most frequently, next, I will give you a detailed introduction to my notes on using the if else Conditional Control statement in php. if you need it, please refer to it.
In php, the basic process control
conditional Statements
When you write code, you often need to perform different actions for different judgments.
You can use conditional statements in your code to accomplish this task.
If...else statements
Executes a piece of code when the
Conditional statements are used to perform different actions based on different conditions, and this article details the relevant knowledge points of the conditional statement.
PHP conditional statements
When you write code, you often need to
Before you introduce the "if" statement, know that the "if" statement is to meet the expression when the execution of a PHP statement, when the condition is not satisfied, is not executed, but, in most cases, always meet the conditions when the
If ... Else statement
Use the If....else statement if you want to execute some code when a condition is set up and execute some other code when the condition is not valid.
Grammar
The code is as follows
Copy Code
if
1. If
The IF structure is one of the most important features in many languages, including PHP, which allows code snippets to be executed on a conditional basis. The IF structure of PHP is similar to the C language:
if (expr)Statement
As defined in
1, if statement
An If statement is an important feature in most languages, and it executes the program segment according to the conditions. PHP's If statement is similar to C:
if (expr)
Statement
As discussed in an expression, expr is computed
PHP ElseIf and else if difference
If, ElseIf, and ELSE statements are used to perform different actions based on different conditions.
Conditional statementWhen you write code, you often need to perform different actions for different
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