What does php dot equal mean?

In PHP, the dot equals ".=" means "splicing characters", and the syntax "String 1.=String 2" is to append the string on the right side of the equal sign to the string on the left After that, the two strings are concatenated into a new string and assigned to the variable on the left.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, the dot is equal to " .=" means "splicing character", which can splice two strings into a new string.

Syntax:

$string1 .= string2;

will append the string on the right side of the equal sign to the left string.

<?php
header("Content-type:text/html;charset=utf-8");
$str = &#39;欢迎访问“PHP中文网”  &#39;;
$str .= &#39;网址：https://www.php.cn/ &#39;;
$str .= &#39;一个在线学习编程的网站&#39;;
echo $str;
?>

In addition to using ".=", you can also use the "." connector to splice two or more strings into one new string.

Grammar:

$string = string1.string2.string3. ······ .stringn;

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$str1 = &#39;欢迎访问“PHP中文网”  &#39;;
$str2 = &#39;网址：https://www.php.cn/ &#39;;
$str3 = &#39;一个在线学习编程的网站&#39;;
$str=$str1.$str2.$str3;
echo $str;
?>推荐学习：《

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