너비를 PHP 정규식으로 바꾸는 방법

$context = &#39;<p style="text-align: center;">
<img alt="" src="http://www.maofa.org/uploadfile/2016/0707/20160707032929237.jpg" style="width: 90%; height:399px" /></p>
<p style="text-align: center;">
<img alt="xxx" src="http://www.maofa.org/uploadfile/2016/0707/20160707032916780.jpg" width="95%"  height="90%" style="width: 95%;" /></p>
<table width="100%"></table>
<img src="http://www.maofa.org/uploadfile/2017/1122/20171122797034.jpg" width="557" height="405" border="0">&#39;;
echo removeImgAttr($context);
function removeImgAttr($content){
$content = preg_replace( 
array(
&#39;/(<img [^<>]*?)width=.+?[\&#39;|\"]/&#39;,
&#39;/(<img.*?)((height)=[\&#39;"]+[0-9|%]+[\&#39;"]+)/&#39;,
&#39;/(<img.*?)((style)=[\&#39;"]+(.*?)+[\&#39;"]+)/&#39;,
) , array(&#39;$1 width="90%" &#39;, &#39;$1&#39;, &#39;$1&#39;) , $content);
return $content;
}