How can I use the += operator in PHP for a string? [duplicate]

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How can I use the += operator for a string in PHP?

Below is a Java example:

String str = "";

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

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

How can I achieve this in PHP?

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You are searching for .=:

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

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

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Either:

$str = $str + "stuff";

Or:

$str .= "stuffsicles";