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正则表达式多余空格如何去掉

WBOY
WBOYOriginal
2016-06-13 12:49:311255browse

正则表达式多余空格怎么去掉?

<br />
echo $keyword = "上海|北京!成都 深圳";<br />
echo "<br />"; <br />
$old1 = array("/(\s*)(\s)(\s*)/","/(\s*)(\|)(\s*)/","/(\s*)(!)(\s*)/");<br />
$new1 = array('" "','"|"','" "!');<br />
echo $keyword3="\"".preg_replace($old1,$new1,$keyword)."\"";<br />
//输出:"上海"|"北京" "!成都" "深圳"<br />
<br />
echo $keyword = "上海 | 北京 !成都   深圳";<br />
echo "<br />"; <br />
$old1 = array("/(\s*)(\s)(\s*)/","/(\s*)(\|)(\s*)/","/(\s*)(!)(\s*)/");<br />
$new1 = array('" "','"|"','" "!');<br />
echo $keyword3="\"".preg_replace($old1,$new1,$keyword)."\"";<br />
//输出:"上海" ""|"" "北京" "" "!成都" "深圳"<br />

上面两种情况:第一种是显示是对的,第二种给各符号间加了空格输去就错误了。请问多余的空格怎么屏蔽掉?

正则表达式
------解决方案--------------------
没看懂你的需求,我做的话用\S提取就足够了
------解决方案--------------------
下面的做法能满足你的需要吗?

<br />
echo $keyword = "上海<br><font color='#FF8000'>------解决方案--------------------</font><br>北京!成都 深圳";<br />
echo "<br />"; <br />
$old1 = array("/(\s*)(\s)(\s*)/","/(\s*)(\<br><font color='#FF8000'>------解决方案--------------------</font><br>)(\s*)/","/(\s*)(!)(\s*)/");<br />
$new1 = array('" "','"<br><font color='#FF8000'>------解决方案--------------------</font><br>"','" "!');<br />
echo $keyword3="\"".preg_replace($old1,$new1,$keyword)."\"";<br />
//输出:"上海"<br><font color='#FF8000'>------解决方案--------------------</font><br>"北京" "!成都" "深圳"<br />
<br />
echo $keyword = "上海 <br><font color='#FF8000'>------解决方案--------------------</font><br> 北京 !成都   深圳";<br />
$keyword = str_replace(" ","",$keyword);<br />
echo "<br />"; <br />
$old1 = array("/(\s*)(\s)(\s*)/","/(\s*)(\<br><font color='#FF8000'>------解决方案--------------------</font><br>)(\s*)/","/(\s*)(!)(\s*)/");<br />
$new1 = array('" "','"<br><font color='#FF8000'>------解决方案--------------------</font><br>"','" "!');<br />
echo $keyword3="\"".preg_replace($old1,$new1,$keyword)."\"";<br />
//输出:"上海" ""<br><font color='#FF8000'>------解决方案--------------------</font><br>"" "北京" "" "!成都" "深圳"<br />

------解决方案--------------------
这样写
$keyword = "上海<br><font color="#FF8000">------解决方案--------------------</font><br>北京!成都 深圳";     //输出:"上海"<br><font color="#FF8000">------解决方案--------------------</font><br>"北京" "!成都" "深圳"<br>
$keyword = "上海 <br><font color="#FF8000">------解决方案--------------------</font><br> 北京 !成都   深圳";//输出:"上海"<br><font color="#FF8000">------解决方案--------------------</font><br>"北京" "!成都" "深圳"<br>
echo "<br>"; <br>
$old1 = array("/!?[^\s!<br><font color="#FF8000">------解决方案--------------------</font><br>]+/", "/\s+/", "/\s*\<br><font color="#FF8000">------解决方案--------------------</font><br>\s*/", '/""/');<br>
$new1 = array('"$0"', ' ', ' <div class="clear">
                 
              
              
        
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