What data types can PHP function parameters accept?

Most PHP function parameters accept multiple data types, including scalar types (integers, floating point numbers, strings, booleans), composite types (arrays, objects), and other types (NULL, resource references). For example, the function myFunction accepts string, integer, and string type parameters and outputs the values ​​passed to these parameters when the function is called.

Acceptable data types for PHP function parameters

Most PHP function parameters can accept multiple data types, the following are The most common data type:

Scalar type:

• Integer (int): Number without decimal point
• Float: A number with a decimal point
• String(string): A sequence composed of characters
• Boolean value (bool): TRUE or FALSE

Composite type:

• Array (array): A collection of elements, which can be of any type
• Object (object): Represents an instance of a class, including data and methods

Other types:

• NULL: Indicates that the parameter has no value
• Resource (resource): External resources (such as files, database connections) Reference

Actual case:

function myFunction($name, $age, $hobby) {
  echo "姓名：$name <br>";
  echo "年龄：$age <br>";
  echo "爱好：$hobby <br>";
}

$name = "John Doe";
$age = 30;
$hobby = "编程";

myFunction($name, $age, $hobby);

Example output:

姓名：John Doe
年龄：30
爱好：编程

This function accepts three parameters: $name (string), $age (integer), and $hobby (string). It outputs the values ​​passed to these parameters.

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