PHP Operator (8) "Ternary Operator" Example Explanation

Today I will explain to you the "ternary operator" among PHP operators.

Introduction to the ternary operator

The ternary operator is often used in programming. It is also called the "ternary operator", just like its name. , it requires three operands, and its function is to select one of two expressions based on one expression, rather than selecting one between two statements or programs. Let’s take a look at the syntax of the ternary operator.

The syntax of the ternary operator

The ternary operator is represented by (?:) and is written as follows

条件？结果1：结果2

When the condition is met, select Result 1, otherwise it is result 2. We will use examples to illustrate it later.

The ternary operator has the same function as the if...else...process statement in PHP. However, the ternary operator is written in one line, with less code and high execution efficiency. a little.

Ternary Operator Example

This example uses the ternary operator to implement a simple selection function. If the condition is true, "PHP Chinese Network" will be output, otherwise it will be output "false", the example code is as follows:

<?php
header("content-type:text/html;charset=utf-8");   //设置编码
$a=100;                                           //说明一个变量
$b=($a==true?PHP中文网:false);
echo $b;
?>

Code running result:

Above we talked about the role of the ternary operator and the if in PHP. ..else... process statements are the same, then we use if...else... process statements to write the above example again. The code is as follows

<?php
header("content-type:text/html;charset=utf-8"); //设置编码
$a=100;                                         
if($a==true){
    echo "PHP中文网";
}else{
    echo "false";
}
?>

Code running results:

You can see that the results of the two examples are the same.

PS: Although the ternary operator is the same as the if...else...process statement, in most cases we only use the ternary operator when the code is relatively simple.

The above is a simple application of the ternary operator

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