相关疑难解决方法(0)

What is this?

This is a collection of questions that come up every now and then about syntax in PHP. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.

Why is this?

It used to be hard to find questions about operators and other syntax tokens.¹
The main idea is to have links to existing questions on Stack Overflow, so it's easier for us to reference them, not to copy over content from …

我实际上不知道如何描述我想要的东西,但我会告诉你:

例如:

$data1 = "the color is";
$data2 = "red";

我应该做什么(或处理)所以$ result是$data1和$data2？的组合？

期望的结果:

$result = "the color is red";

有人能说出我做错了什么

$str = "";
$str += "Was het maar vrijdag";
$str += "Was het maar zaterdag";
echo $str;

这个回报0