How can I use += operator in PHP for String [duplicate]

问题

This question already has answers here:

How to combine two strings together in PHP? (17 answers)

Closed 5 years ago.

I am new to PHP. I need to know how to use += operator for string in PHP. Below is Java example:

String str = "";

str += "some value";
str += "some more values";

the above example concatenates and assign all values to str object.

Can somebody tell me how to achieve this in PHP?

回答1:

You are searching for .=:

$str = "";
$str .= "some value";

回答2:

 $str .= "some value"; 
 $str .= "some more values";

回答3:

Either:

$str = $str + "stuff";

Or:

$str .= "stuffsicles";

来源：https://stackoverflow.com/questions/6476940/how-can-i-use-operator-in-php-for-string