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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
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
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
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
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
First, If...else statement
If...else statement
Executes a piece of code when the condition is set, and executes another piece of code when the condition is not established
Grammar:
1. Simple condition
if (condition) {
......
}
else{
......
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
First, If...else statement
If...else statement
Executes a piece of code when the condition is set, and executes another piece of code when the condition is not established
Grammar:
1. Simple condition
if (condition) {......}else{......}
Cases
In PHP, the if/else execution mechanism is the following code. in php, the test is that if branch is slow for 2.9 seconds, else branch is fast for 2.2 seconds, and if conditions are set to 1 = 1 and 1! = 1 transformation. what mechanism is this?
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