PHP string connection code compilation method

To connect multiple strings, you must use a (.) "vertex", for example:

 
 

  
  
<?php   
  
  
$name = "w3pop";   
  
  
echo $name.".com";   
  
  
?>   
 
 

The output above is w3pop.com.

There is a PHP string connection. When echo is followed by double quotation marks ("), it can achieve the same effect as above:

 
 

  
  
<?Php
  
  
$Name="W3pop"; // This sentence is the same
  
  
Echo "$ name.com"; // variables in double quotation marks can still be displayed normally,
And automatically separated from the general string
  
  
?>
 
 

However, if it is a single quotation mark, it will completely output the content to the browser in the form of a string:

 
 

  
  
<?php   
  
  
$name = "w3pop.com";   
  
  
echo '$name.com';   
  
  
?>   
 
 

$ Name.com will be displayed

PHP string connection sample code:

 
 

  
  
<?php   
  
  
$name = "w3pop";   
  
  
echo $name.".com";   
  
  
?>   
  
  
<br />   
  
  
<?php   
  
  
$name = "w3pop";   
  
  
echo "$name.com";   
  
  
?>   
  
  
<br />   
  
  
<?php   
  
  
$name = "w3pop.com";   
  
  
echo '.com';   
  
  
?>   
 
 

Output result

W3pop.com

W3pop.com.com

$ Name.com

How do you know the PHP string connection method through the above Code demonstration?