提取字符串中所有src图片的地址 或清空

/**
* 提取字符串中图片url地址
* @param type $str
* @return type
*/
function getimgs($str) {
$reg = '/((http|https):\/\/)+(\w+\.)+(\w+)[\w\/\.\-]*(jpg|gif|png)/';
$matches = array();
preg_match_all($reg, $str, $matches);

foreach ($matches[0] as $value) {
$data[] = $value;
}
return $data;
}