php正则替换问题

//1，如何去掉出现“微信号”及紧邻的标签对，如下代码中去掉这块内容：<div>这里有很多其他字符、表单等等....微信号...这里有很多其他字符、表单等等</div>		$content	= "0000<div>111<div>222<div>这里有很多其他字符、表单等等....微信号...这里有很多其他字符、表单等等</div>222</div>111</div>0000";				//2，如何去掉出现qrcode_for_gh_2ff16e7c9789_258.jpg的图片		$content	= '<img   style="max-width:90%" title="" alt="" src="http://www.aabbcc.com/upload/kdidd08983.jpg"><img   style="max-width:90%" title="" alt="" src="http://www.aabbcc.com/upload/qrcode_for_gh_2ff16e7c9789_258.jpg">';		// $content	= preg_replace('/<img (.*?)src=["\']http[s]?:\/\/www\.aabbcc\.com\/upload\/qrcode_for_gh_2ff16e7c9789_258\.jpg["\'](.*?) alt="php正则替换问题" >/is', '', $content);		var_dump( $content );

1、echo preg_replace('/<[^>]+>[^<>]*微信号[^<>]*<[^>]+>/u', '', $content);2、$content    = preg_replace('/<img ([^ alt="php正则替换问题" >]+)src=["\']http[s]?:\/\/www\.aabbcc\.com\/upload\/qrcode_for_gh_2ff16e7c9789_258\.jpg["\'](.*?)>/is', '', $content);

1、echo preg_replace('/<[^>]+>[^<>]*微信号[^<>]*<[^>]+>/u', '', $content);2、$content    = preg_replace('/<img ([^ alt="php正则替换问题" >]+)src=["\']http[s]?:\/\/www\.aabbcc\.com\/upload\/qrcode_for_gh_2ff16e7c9789_258\.jpg["\'](.*?)>/is', '', $content);

$content	= "0000<div>111<div>222<div>这里有很多其他字符、表单等等....微信号...这里有很多其他字符、表单等等</div>222</div>111</div>0000";		$content	= preg_replace('/<[^>]+>[^<>]*微信号[^<>]*<[^>]+>/', '', $content);// 去掉修饰符就可以了		

<div><span style="word-wrap: break-word; font-weight: 700; color: rgb(68, 68, 68); font-family: Tahoma, 'Microsoft Yahei', Simsun; line-height: 21px;">				<font style="word-wrap: break-word; background-color: yellow;">扫描二维码</font>				或直接搜索微信号：<font style="word-wrap: break-word; background-color: yellow;"> mcq28tui</font>			</span></div>