Function emit_phpdoc 

pub fn emit_phpdoc(
    out: &mut String,
    doc: &str,
    indent: &str,
    exception_class: &str,
)

Emit PHPDoc-style comments (/** … */) Used for PHP classes, methods, and properties.

Sanitizes Rust-specific idioms before translating rustdoc sections (# Arguments → @param, # Returns → @return, # Errors → @throws, # Example → ```php fence) via render_phpdoc_sections.

exception_class is the PHP exception class name to use in @throws tags.