php获取指定div内容

<?php

//取div class="fraction-dl"的内容

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, ‘http://www.singtec.cn/xiezuo/1517195608.html‘);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt( $ch, CURLOPT_HEADER, 0 );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt( $ch, CURLOPT_POSTFIELDS, $data );
$return = curl_exec( $ch );
curl_close( $ch );

$regex4="/<div class=\"fraction-dl\".*?>.*?<\/div>/ism";
if(preg_match_all($regex4, $return, $matches)){
print_r($matches[0]);
}else{
echo ‘错误！‘;
}

?>