src/core/class-papi-core-property.php
public function html_id( $suffix = '', $row = null ) {
		if ( is_array( $suffix ) || is_object( $suffix ) ) {
			return papi_f( $this->html_name( $suffix, $row ) );
		} else {
			$suffix = empty( $suffix ) || ! is_string( $suffix ) ? '' : '_' . $suffix;
			$suffix = papi_underscorify( papi_slugify( $suffix ) );
		}

		$name = $this->html_name();
		$len  = strlen( $name );

		if ( isset( $name[$len - 1] ) && $name[$len - 1] === ']' ) {
			return papi_f( sprintf( '%s%s]', substr( $name, 0, $len - 1 ), $suffix ) );
		}

		return papi_f( sprintf( '%s%s', $this->html_name(), $suffix ) );
	}
public function html_id( $suffix = '', $row = null ) {
		if ( is_array( $suffix ) || is_object( $suffix ) ) {
			return papi_f( $this->html_name( $suffix, $row ) );
		} else {
			$suffix = empty( $suffix ) || ! is_string( $suffix ) ? '' : '_' . $suffix;
			$suffix = papi_underscorify( papi_slugify( $suffix ) );
		}

		$name = $this->html_name();
		$len  = strlen( $name );

		if ( isset( $name[$len - 1] ) && $name[$len - 1] === ']' ) {
			return papi_f( sprintf( '%s%s]', substr( $name, 0, $len - 1 ), $suffix ) );
		}

		return papi_f( sprintf( '%s%s', $this->html_name(), $suffix ) );
	}
Get the html id attribute value.

@param  object|string $suffix
@param  int           $row

@return string