PHP String Concatenation: Syntax Rules

1 year ago
Ava Mitchell
1 minute

In PHP, string concatenation can be done by using the “.” operator to join multiple strings together. This operator can be used to combine strings, variables, and constants.

Here are a few examples:

  1. String concatenation
$str1 = "Hello";
$str2 = "World";
$result = $str1 . " " . $str2;
echo $result; // 输出：Hello World
  1. Concatenating variables and strings.
$name = "John";
$message = "Hello, " . $name;
echo $message; // 输出：Hello, John
  1. Concatenate constants and strings.
define("GREETING", "Hello");
$str = GREETING . ", World!";
echo $str; // 输出：Hello, World!
  1. Joining multiple strings:
$str1 = "Hello";
$str2 = "World";
$str3 = "!";
$result = $str1 . $str2 . $str3;
echo $result; // 输出：HelloWorld!

Please note that PHP also offers a more concise syntax for concatenating variables and strings by wrapping the variable in “{}”, which will automatically be parsed within the string. For example:

$name = "John";
$message = "Hello, {$name}!";
echo $message; // 输出：Hello, John!

In conclusion, in PHP, string concatenation can be achieved by using the “.” operator to join multiple strings together.

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