什么是“:"在PHP中意味着什么? [英] What does ":" mean in PHP?

问题描述

可能重复: PHP中的:"是什么?

:在以下PHP代码中是什么意思?

What does the : mean in the following PHP code?

<?php
    while (have_posts()) : the_post();
?>

推荐答案

它称为

It's called an Alternative Syntax For Control Structures. You should have an endwhile; somewhere after that. Basically, it allows you to omit braces {} from a while to make it look "prettier"...

根据您的修改，它称为三元运算符(这是第三部分).基本上，这是作业的简写.

As far as your edit, it's called the Ternary Operator (it's the third section). Basically it's an assignment shorthand.

$foo = $first ? $second : $third;

等于说(短一点):

if ($first) {
    $foo = $second;
} else {
    $foo = $third;
}

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