PHP中怎么转义，大拿请帮忙！

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Release： 2016-06-13 11:55:03

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PHP中如何转义，大拿请帮忙！！！急急急！！！
以下new_content是mysql中使用select返回的内容

<br />$new_content='<P>下面我给大家讲讲javascript函数：</P><PRE class=js name="code"><script> <BR>function show() <BR>{ <BR>alert("hello world"); <BR>} <BR></script>

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结果如图：
tu1

';

请问如何将其中的<script>和</script>转换成<script>和</script>
------解决方案--------------------
htmlspecialchars这个函数可以转义
------解决方案--------------------

$new_content='<P>下面我给大家讲讲javascript函数：</P><PRE class=js name="code"><script> <BR>function show() <BR>{ <BR>alert("hello world"); <BR>} <BR></script>

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结果如图：
tu1

';
var_dump(preg_replace_callback('/<\/?script>/i', function($r){return htmlentities($r[0]);}, $new_content)) ;

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