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BOOK: Professional WordPress Plugin Development
This is the forum to discuss the Wrox book Professional WordPress Plugin Development by Brad Williams, Ozh Richard, Justin Tadlock; ISBN: 978-0-470-91622-3
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Old April 26th, 2011, 05:06 AM
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Default Can't Get Test Plugin To Save Updates...

I copied this pretty much straight from the book and adapted it. It has a simple widget option, but I can't get the setting to save and I've been all through chapter four trying to figure out where I went wrong and I don't see it.

I tried to keep it very simple for my first attempt. The widget works in all ways except it does not have a selected option, the default argument is not passing to the variable, but even when I set it manually with if (!$size)... there is still no option selected. Also after selecting and saving, the options unset on reload.

Does anyone see my error?

Code:
$inm_ccd_file = "catalyst-certified-developer-plugin.php";

register_activation_hook( plugin_dir_path($inm_ccd_file), 'inm_ccd_install' );

function inm_ccd_install() {
    if ( version_compare( get_bloginfo( 'version' ), '3.1', '<' ) ) {
        deactivate_plugins( basename( plugin_dir_path($inm_ccd_file) ) ); // Deactivate our plugin
    }
}

/*
register_deactivation_hook( $inm_ccd_file_path, "inm_ccd_uninstall" );

function inm_ccd_uninstall() {
    	
}
*/

// use widgets_init action hook to execute custom function
add_action( 'widgets_init', 'inm_ccd_image_display_widget_register_widgets' );

 //register our widget
function inm_ccd_image_display_widget_register_widgets() {
    register_widget( 'inm_ccd_image_display_widget' );
}

// include 'includes/inm-ccd-widget.php';


//inm_ccd_image_display_widget class
class inm_ccd_image_display_widget extends WP_Widget {

    //process the new widget
    function inm_ccd_image_display_widget() {
        $widget_ops = array( 
			'classname' => 'inm_ccd_image_display_widget_class', 
			'description' => 'Display a Catalyst Certified Developer badge.' 
			); 
        $this->WP_Widget( 'inm_ccd_image_display_widget', 'Catalyst | Cert. Dev. Badge', $widget_ops );
    }
 
     //build the widget settings form
    function form($instance) {
		$image_url = " [path to my images] ";
        $defaults = array( 
			'size' => 'catalyst-certified-70.png'
			); 
        $instance = wp_parse_args( (array) $instance, $defaults );
		$size = $instance['size'];
		
		if(!$size) $size = "catalyst-certified-30.png";
        ?>
				
            <div align="center" style="text-align: left;"><img width="20%" height="20%" src="<?php echo $image_url . $size; ?>" /><br /><br />
			&nbsp;&nbsp;&nbsp;<input type="radio" name="size" value="<?php echo $image_url; ?>catalyst-certified-30.png" <?php selected($size, 'catalyst-certified-30.png') ?> > Small (136 x 67)<br />
			&nbsp;&nbsp;&nbsp;<input type="radio" name="size" value="<?php echo $image_url; ?>catalyst-certified-70.png" <?php selected($size, 'catalyst-certified-70.png') ?> > Large (316 x 155)<br />
			</div>
        
		<?php
    }
 
    //save the widget settings
    function update($new_instance, $old_instance) {
        $instance = $old_instance;
        $instance['size'] = strip_tags($new_instance['size']);
		return $instance;
    }
 
    //display the widget
    function widget($args, $instance) {
		$inm_ccd_pre_image = '<img src="';
		$inm_ccd_post_image = '" />';
        extract($args);
        echo $before_widget;
		$size = empty( $instance['size'] ) ? ' [path to my images] ' : $instance['size'];
        echo $inm_ccd_pre_image.$size.$inm_ccd_post_image;
		echo $after_widget;
    }
}

Last edited by surfjam; April 26th, 2011 at 02:39 PM..





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