字符串如下：
“http:\/\/www.sina.com\/music1\/23412455.mp3?time=2234523&type=mp3”
“http:\/\/www.sina.com\/music2\/4325243.mp3?time=2234523&type=mp3”
“http:\/\/www.sina.com\/music3\/346553.mp3?time=2234523&type=mp3”
需要对http开始，？结束之间的字符串换成“abc”，在php的str_replace函数里，该如何写？谢谢
------解决方案--------------------
str_replace 用不了正则，用preg_replace 吧
------解决方案--------------------
$urls = array("http:\/\/www.sina.com\/music1\/23412455.mp3?time=2234523&type=mp3",
"http:\/\/www.sina.com\/music2\/4325243.mp3?time=2234523&type=mp3",
"http:\/\/www.sina.com\/music3\/346553.mp3?time=2234523&type=mp3");
foreach($urls as $url){
echo preg_replace('@http(.*?)\?@i','abc',$url).'<br>';
}