enabling php code on selected pages

Hi All,

I’m putting together a custom module for the Divi pagebuilder as a plugin. This “theme” let’s you select different modules – fill in some text or an image, etc… in order to build up a page. The module I am extending is the “Code” module. As it stands, the code module is simple a textarea into which you can put HTML or JS in script tags that will be outputted in the DOM. I am adding in codemirror with theming and linting options. One person requested that I also include the ability to add php. So now I am trying to figure out how to be able to apply a filter to the_content of just pages where this particular module is in use. I think it would be too scary to apply the filter to the_content of all pages. How would you all approach this? I am pasting the code of the base module so that you can take a look at what I have to work with.

class ET_Builder_Module_Code extends ET_Builder_Module {
	function init() {
		$this->name            = esc_html__( 'Code', 'et_builder' );
		$this->slug            = 'et_pb_code';
		$this->fb_support      = true;
		$this->use_row_content = true;
		$this->decode_entities = true;

		$this->whitelisted_fields = array(
			'raw_content',
			'admin_label',
			'module_id',
			'module_class',
			'max_width',
			'max_width_tablet',
			'max_width_phone',
		);
	}

	function get_fields() {
		$fields = array(
			'raw_content' => array(
				'label'           => esc_html__( 'Content', 'et_builder' ),
				'type'            => 'textarea',
				'option_category' => 'basic_option',
				'description'     => esc_html__( 'Here you can create the content that will be used within the module.', 'et_builder' ),
				'is_fb_content'   => true,
			),
			'max_width' => array(
				'label'           => esc_html__( 'Max Width', 'et_builder' ),
				'type'            => 'text',
				'option_category' => 'layout',
				'tab_slug'        => 'advanced',
				'mobile_options'  => true,
				'validate_unit'   => true,
			),
			'max_width_tablet' => array(
				'type'     => 'skip',
				'tab_slug' => 'advanced',
			),
			'max_width_phone' => array(
				'type'     => 'skip',
				'tab_slug' => 'advanced',
			),
			'disabled_on' => array(
				'label'           => esc_html__( 'Disable on', 'et_builder' ),
				'type'            => 'multiple_checkboxes',
				'options'         => array(
					'phone'   => esc_html__( 'Phone', 'et_builder' ),
					'tablet'  => esc_html__( 'Tablet', 'et_builder' ),
					'desktop' => esc_html__( 'Desktop', 'et_builder' ),
				),
				'additional_att'  => 'disable_on',
				'option_category' => 'configuration',
				'description'     => esc_html__( 'This will disable the module on selected devices', 'et_builder' ),
			),
			'admin_label' => array(
				'label'       => esc_html__( 'Admin Label', 'et_builder' ),
				'type'        => 'text',
				'description' => esc_html__( 'This will change the label of the module in the builder for easy identification.', 'et_builder' ),
			),
			'module_id' => array(
				'label'           => esc_html__( 'CSS ID', 'et_builder' ),
				'type'            => 'text',
				'option_category' => 'configuration',
				'tab_slug'        => 'custom_css',
				'option_class'    => 'et_pb_custom_css_regular',
			),
			'module_class' => array(
				'label'           => esc_html__( 'CSS Class', 'et_builder' ),
				'type'            => 'text',
				'option_category' => 'configuration',
				'tab_slug'        => 'custom_css',
				'option_class'    => 'et_pb_custom_css_regular',
			),
		);

		if ( et_fb_is_enabled() || et_fb_is_retrieving_builder_data() ) {
			$fields["max_width_last_edited"] = array(
				'type'     => 'skip',
				'tab_slug' => 'advanced',
			);
		}

		return $fields;
	}

	function shortcode_callback( $atts, $content = null, $function_name ) {
		$module_id        = $this->shortcode_atts['module_id'];
		$module_class     = $this->shortcode_atts['module_class'];
		$max_width        = $this->shortcode_atts['max_width'];
		$max_width_tablet = $this->shortcode_atts['max_width_tablet'];
		$max_width_phone  = $this->shortcode_atts['max_width_phone'];

		$module_class = ET_Builder_Element::add_module_order_class( $module_class, $function_name );

		$this->shortcode_content = et_builder_replace_code_content_entities( $this->shortcode_content );

		if ( '' !== $max_width_tablet || '' !== $max_width_phone || '' !== $max_width ) {
			$max_width_values = array(
				'desktop' => $max_width,
				'tablet'  => $max_width_tablet,
				'phone'   => $max_width_phone,
			);

			et_pb_generate_responsive_css( $max_width_values, '%%order_class%%', 'max-width', $function_name );
		}

		$output = sprintf(
			'<div%2$s class="et_pb_code et_pb_module%3$s">
				%1$s
			</div> <!-- .et_pb_code -->',
			$this->shortcode_content,
			( '' !== $module_id ? sprintf( ' id="%1$s"', esc_attr( $module_id ) ) : '' ),
			( '' !== $module_class ? sprintf( ' %1$s', esc_attr( $module_class ) ) : '' )
		);

		return $output;
	}
}
new ET_Builder_Module_Code;