PHP String Operators

PHP String Operators are two operands such as “.” and “.=”.

You can use the PHP “.” operator to concatenate two strings together. It allows you to combine strings to create a new string that contains the contents of both original strings. For example:

$greeting = "Hello ";
$name = "John";
$message = $greeting . $name;
echo $message; // Outputs "Hello John"
$greeting = "Hello ";
$name = "John";
$message = $greeting . $name;
echo $message; // Outputs "Hello John"

In this example, we use the “.” operator to concatenate the strings “Hello ” and “John” to create the new string “Hello John”.

On the other hand, the “.=” operator combines the assignment operator “=” and the concatenation operator “.” into a single operator. We can use it to append a string to the end of an existing string variable. For example:

$$greeting = "Hello ";
$name = "John";
$greeting .= $name;
echo $greeting; // Outputs "Hello John"
$$greeting = "Hello ";
$name = "John";
$greeting .= $name;
echo $greeting; // Outputs "Hello John"

In this example, we use the “.=” operator to append the string stored in the variable $name to the end of the string stored in the variable $greeting, resulting in the new string “Hello John”.

We can use the both operators with variables, string literals, or a combination of both. The result of using either operator is always a new string that is the concatenation of the two original strings.

In summary, the “.” operator is used to concatenate two strings together, while the “.=” operator is used to append a string to the end of an existing string variable.

To learn more visit PHP Manual.