If you want to add new lock options under Downloads --> Add New --> Package Settings --> Lock Options you can use this hook.
No arguments are passed to this hook.
Add new lock options under Package Settings --> Lock Options.
<?php add_action('wpdm_download_lock_option','my_lock_option'); ?>
<?php
add_action('wpdm_download_lock_option','my_lock_option');
function my_lock_option(){
?>
<h3><input type="checkbox" rel="facebooklike" class="wpdmlock" name="file[facebooklike_lock]" <?php if(get_post_meta($post->ID,'__wpdm_facebooklike_lock', true)=='1') echo "checked=checked"; ?> value="1"><?php echo __('Enable Facebook Like Lock','wpdmpro'); ?></h3>
<div id="facebooklike" class="frm fwpdmlock" <?php if(get_post_meta($post->ID,'__wpdm_facebooklike_lock', true)!=1) echo "style='display:none;'"; ?> >
<table width="100%" cellpadding="0" cellspacing="0">
<?php if(get_option('_wpdm_facebook_app_id')=='') echo "<tr><td colspan=2>You have to add a Facebook appID <a href='admin.php?page=file-manager/settings#fbappid'>here</a></td></tr>"; ?>
<tr>
<td width="90px"><?php echo __('URL to Like:','wpdmpro'); ?></td>
<td><input size="10" style="width: 200px" type="text" name="file[facebook_like]" value="<?php echo get_post_meta($post->ID,'__wpdm_facebook_like', true) ?>" /></td>
</tr>
</table>
</div>
<?php
}
?>
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