在Joomla项目中工作时出现PHP偏移错误

我的代码：

My Code:

// SlideShow Content - Loop
		for ( $i=0 ; $i < count($this->image) ; $i++ ) {
			// Preparing Titles
			$this->alt[$i] 				= $this->title[$i] ? ' alt="'. $this->title[$i] .'"' : '';
			$this->alttitle[$i] 		= $this->title[$i] ? ' title="'. $this->title[$i] .'"' : '';
			// Preparing Links
			$this->imagelinkstart[$i] 	= $this->linked ? '<a href="'. $this->url[$i] .'" target="'. $this->target .'">' : '<a href="java<!-- no -->script:void(0);">';
			$this->imagelinkend		 	= '<\/a>';
			
			// Show Only Entered Images
			if (!$this->showallimages) {
				// External Image Resource
				if (strstr($this->image[$i],'<ext>')) {
					$this->image[$i] = str_replace('<ext>','',$this->image[$i]);
					$this->imagewithpath[$i] = '<img src="'. $this->image[$i] . '" border="0" style="'.$this->imagewidth . $this->imageheight.'"'. $this->alt[$i] . $this->alttitle[$i] .'\/>';
				}
				// Internal Image Resource
				else $this->imagewithpath[$i] = '<img src="'.JURI::root() . $this->folder . '/' . $this->image[$i] . '" border="0" style="'.$this->imagewidth . $this->imageheight.'"'. $this->alt[$i] . $this->alttitle[$i] .'\/>';			
			}
			// Show All Images in the folder
			else $this->imagewithpath[$i] = '<img src="'.JURI::root() . $this->image[$i] . '" border="0" style="'.$this->imagewidth . $this->imageheight.'"'. $this->alt[$i] . $this->alttitle[$i] .'\/>';
			
			// Prepared SlideShow (Content) Image:
			$this->slideshowcontent[$i]	= $this->showallimages ? $this->imagelinkstart[$i].$this->imagewithpath[$i].$this->imagelinkend : $this->imagelinkstart[$i].$this->imagewithpath[$i].$this->imagelinkend;
		}

错误消息：

Error Message:

Notice: Undefined offset: 1 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 78

Notice: Undefined offset: 1 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 79

Notice: Undefined offset: 2 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 78

Notice: Undefined offset: 2 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 79

Notice: Undefined offset: 3 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 78

Notice: Undefined offset: 3 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 79

Notice: Undefined offset: 4 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 78

Notice: Undefined offset: 4 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 79

Notice: Undefined offset: 5 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 78

Notice: Undefined offset: 5 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 79

Notice: Undefined offset: 6 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 78

Notice: Undefined offset: 6 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 79

Notice: Undefined offset: 7 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 78

Notice: Undefined offset: 7 in C:\xampp\htdocs\joomlaadmin\modules\mod_slideshow\helper.php on line 79

请帮帮我。

Please help me.