/**
* 内容中图片地址转成绝对地址
* @param $content
* @return mixed
*/
private function imgUrl($content)
{
preg_match_all('/<img(.*)src="([^"]+)"[^>]+>/isU', $content, $matches);
$vote_content = $content;
$img = '';
$imgDiv = '';
if (!empty($matches)) {
//注意，上面的正则表达式说明src的值是放在数组的第三个中
$img = $matches[2];
$imgDiv = $matches[0];
} else {
$img = '';
$imgDiv = '';
}
if (!empty($img)) {
$img_url = asset('');
$patterns = array();
$replacements = array();
foreach ($img as $imgItem) {
$final_imgUrl = $img_url . $imgItem;
//获取文本中的所有图片
$this->imgString[] = $final_imgUrl;
$replacements[] = $final_imgUrl;
$img_new = "/" . preg_replace("///i", "/", $imgItem) . "/";
$patterns[] = $img_new;
}
//让数组按照key来排序
ksort($patterns);
ksort($replacements);
//替换内容
$vote_content = preg_replace($patterns, $replacements, $content);
}
return $vote_content;
}