Maison >développement back-end >tutoriel php >正则表达式多余空格如何去掉
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 />
<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 />
$keyword = "上海<br><font color="#FF8000">------解决方案--------------------</font><br>北京!成都 深圳"; //输出:"上海"<br><font color="#FF8000">------解决方案--------------------</font><br>"北京" "!成都" "深圳"<br>$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"> </div>