Concatenate two variables or strings – PHP

Hi Friends,
The DOT(.) operator is used to concatenate two variable or string in PHP. The ‘.’ operator which returns the concatenation of its right and left string.
eg:

And also ‘.=’ operator used append the arguments on the right side to the left side arguments.
eg:

Example 1

 
';
echo "hello". "World";
echo '
';  // Output: helloworld
$a1 = "Hello ";
$a1 .= "World!";     // now $a1 contains "Hello World!"
echo $a1;
echo "hi". "welcome";
?>
 

Example 2

 ';
echo'this is ', $a ,' and ', $b;  //output: this is hello and world
echo "
";
echo"this is $a and $b";           // Output:this is hello and world
?>
 

COMMA is not concatenating it just used to echo one by one and in that way complete string appears together.In javascript PLUS(+) is used as concatenation operator.

If anyone has doubts on this topic then please do let me know by leaving comments or send me an email.