php . and .=

.String concatenation

.=String concatenation assignment

Source code:

$a = "z21";

$b = $a . "seven";

echo $b;

echo "
";

$c = "z21";

$c .="seven"; // $ c=$c+"seven"

echo $c;

?>

Output:

z21seven

z21seven

The above introduces php . and .=, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.