classes.md

Classes

Structs can be exported to PHP as classes with the #[php_class] attribute macro. This attribute derives the RegisteredClass trait on your struct, as well as registering the class to be registered with the #[php_module] macro.

Options

The attribute takes some options to modify the output of the class:

• name - Changes the name of the class when exported to PHP. The Rust struct name is kept the same. If no name is given, the name of the struct is used. Useful for namespacing classes.

There are also additional macros that modify the class. These macros must be placed underneath the #[php_class] attribute.

• #[extends(ce)] - Sets the parent class of the class. Can only be used once. ce must be a valid Rust expression when it is called inside the #[php_module] function.
• #[implements(ce)] - Implements the given interface on the class. Can be used multiple times. ce must be a valid Rust expression when it is called inside the #[php_module] function.

You may also use the #[prop] attribute on a struct field to use the field as a PHP property. By default, the field will be accessible from PHP publically with the same name as the field. Property types must implement IntoZval and FromZval.

You can rename the property with options:

• rename - Allows you to rename the property, e.g. #[prop(rename = "new_name")]

Example

This example creates a PHP class Human, adding a PHP property address.

# extern crate ext_php_rs;
# use ext_php_rs::prelude::*;
#[php_class]
pub struct Human {
    name: String,
    age: i32,
    #[prop]
    address: String,
}
# #[php_module]
# pub fn get_module(module: ModuleBuilder) -> ModuleBuilder {
#     module
# }

Create a custom exception RedisException, which extends Exception, and put it in the Redis\Exception namespace:

# extern crate ext_php_rs;
use ext_php_rs::prelude::*;
use ext_php_rs::{exception::PhpException, zend::ce};

#[php_class(name = "Redis\\Exception\\RedisException")]
#[extends(ce::exception())]
#[derive(Default)]
pub struct RedisException;

// Throw our newly created exception
#[php_function]
pub fn throw_exception() -> PhpResult<i32> {
    Err(PhpException::from_class::<RedisException>("Not good!".into()))
}
# #[php_module]
# pub fn get_module(module: ModuleBuilder) -> ModuleBuilder {
#     module
# }