The concatenation of strings in php is

The string concatenation character in PHP is the period (.), which concatenates strings to generate new strings and automatically converts non-strings into strings. The period operator is also used in string concatenation, interpolation, and object calling.

PHP string concatenation character

The string concatenation character in PHP is period (.) . It is used to concatenate two or more strings to produce a new string. For example:

<code class="php">$str1 = "Hello";
$str2 = "World";
$newStr = $str1 . " " . $str2; // "Hello World"</code>

When you use periods to concatenate strings, PHP will automatically convert them to the string type. Therefore, the following code will also produce the same output:

<code class="php">$num1 = 10;
$num2 = 20;
$result = $num1 . $num2; // "1020"</code>

Additional usage:

In addition to concatenating strings, the period operator can also be used for the following purposes:

• String concatenation: Combine multiple string parts into a complete string. For example:

<code class="php">$name = "John";
$age = 30;
$address = "123 Main Street";
$info = "Name: $name, Age: $age, Address: $address";</code>

• String interpolation: Embed the variable value into a string. For example:

<code class="php">$greeting = "Hello, $name!"; // "Hello, John!"</code>

• Object call: Access the properties or methods of the object. For example:

<code class="php">$obj->property; // 访问对象的属性
$obj->method(); // 调用对象的メソッド</code>

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