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<?php function get_tumbail($imgSrc,$placeholder_image){ $imgPattern = "/(http\:\/\/ww\d+\.sinaimg\.cn\/)(\w+)(\/\S+\.(jpg|gif))/i"; $matches = null; $result = preg_match($imgPattern, $imgSrc, $matches); if (!$result) { return $placeholder_image; } return $matches[1] . 'thumbnail' . $matches[3]; } $placeholder_image = 'images/transparent.gif'; $imgStr = '<img src="http://ww2.sinaimg.cn/bmiddle/a3d444e3jw1ez79amvdi1j20l50s8gpl.jpg"/>'; $imgStr = preg_replace_callback('#<img([^>]+?)src=[\'"]?([^\'"\s>]+)[\'"]?([^>]*)>#',function($match,$placeholder_image) { var_dump($match); return sprintf('<img$match[1]src="%s" data-original="$match[2]" class="lazy"$match[3]><noscript><img${1}src="${2}"${3}></noscript>', get_tumbail($match[2],$placeholder_image)); },$imgStr); var_dump($imgStr);

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