What does it mean to add a dot before and after a variable in PHP?

In PHP, adding a "." dot before and after a variable means to connect the variable with the content before and after; the connector "." is used to connect several strings for display, and dots are used between strings. To connect, that is, the half-width period "." in English, you can connect two or more strings into one string.

The operating environment of this article: Windows 10 system, PHP version 7.1, Dell G3 computer.

What does it mean in PHP to add a dot before and after a variable?

PHP adds a dot after defining a variable to connect strings

PHP uses dots. to connect strings

$str1="Hello";
$str3=$str1."World";// $str3==Hello Word

Many times we need to connect several strings for display. In PHP, "dots" are used to connect strings, which is the half-width period "." in English. " . " is a string concatenation operator that can link two or more strings into one string. For example:

<?php
$name = "好好学习，";
$url =  "天天向上";
echo $name . $url . "。";
?>

The output result is: study hard and make progress every day.

Recommended learning: "PHP Video Tutorial"

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