Usage of . in php

"." in php is a character operator, which is used to connect two strings. How to use it: first create a PHP sample file; then define two variables; finally pass "$result.$ result" method to connect the two variables.

The operating environment of this tutorial: Windows 7 system, PHP version 7.1, DELL G3 computer.

php variable and string connector-dot

Connector-dot is also an operator in itself. Its real name should be "character operator". Its function is to concatenate two strings.

echo character . variable . character;

//The dot connects three values ​​into one and runs normally.

Example 1:

1.字符串+变量+字符串
echo("<!--".$result."-->");
2.变量+变量
echo($result.$result);
3.字符串+变量
echo("a".$result);

Example 2

.Concatenation

$txt1 = "Hello" 
$txt2 = $txt1 . " world!"

Now $txt2 contains "Hello world!"

Output:

Hello world!

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