/**
*  文章内容提取第一张图片
*
* @access    public
* @param     string  $id文档id
* @param     string  $addField字段名
* @return    string
*/
if(!function_exists('getBodyonepic'))
{
function getBodyonepic($id, $addField='body')
{
global $dsql;
$row = $dsql->GetOne("SELECT a.litpic,c.addtable FROM dede_archives AS a LEFT JOIN dede_channeltype AS c ON a.channel=c.id where a.id='$id'");
$addtable = trim($row['addtable']);
if($row['litpic'] == '-' || $row['litpic'] == '')
{
$litpic = $GLOBALS['cfg_cmspath'].'/images/defaultpic.gif';
}
$row = $dsql->GetOne("SELECT $addField FROM `$addtable` WHERE aid=$id");
$body = $row["$addField"];
preg_match_all("/<img([^>]*)\s*src=('|\")([^'\"]+)('|\")/",$body,$matches);
$imgsrc_arr = array_unique($matches[3]);
$result = $imgsrc_arr[0] ? $imgsrc_arr[0] : $litpic;
return $result;
}
}

/**
*  文章内容提取图片(多张)自定义输出
*
* @access    public
* @param     string  $string  文档内容
* @param     string  $num  输出几张
* @return    string
*/
if(!function_exists('getBodypics'))
{
function getBodypics($string, $num)
{
preg_match_all("/<img([^>]*)\s*src=('|\")([^'\"]+)('|\")/",$string,$matches);
$imgsrc_arr = array_unique($matches[3]);
$count = count($imgsrc_arr);
$i = 0;
foreach($imgsrc_arr as $imgsrc)
{
if($i == $num) break;
$result .= "<img src=\"$imgsrc\"/>";
$i++;
}
return $result;
}
}