请教一个正则问题-PHP Tutorial-php.cn

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请教一个正则问题

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Jun 23, 2016 pm 02:09 PM

原字符串：

    la belle
    courbe de


    Parfait comme
    cadeau pour votre amoureux


    NOTE
    : Laver
    à la main

处理后的字符串：

  la belle courbe de

  Parfait comme cadeau pour votre amoureux

  NOTE : Laver à la main

问题：
请问如何写正则
preg_replace();

回复讨论(解决方案)

$arr1=array('#]+>([^\r\n#i', '#
]*>#i', '#?span>\r\n#i');
$arr2=array('$1 ', '
', '');
preg_replace($arr1, $arr2, $str);

\r\n是windows文本换行符，要注意对应文本的格式
没环境测试，自己摸索一下吧

$str1 = '

        la belle
        courbe de


        Parfait comme
        cadeau pour votre amoureux


        NOTE
        : Laver
        à la main

';

$reg = "/||zd=\"(.*)\"|closure_uid_235198886=\"(.*)\"/iU";
$str = preg_replace($reg, '', $str1);

var_dump($str);exit;

$s =<<< TXT<LI>  <SPAN id=result_box lang=fr c="4" a="undefined" zd="null" closure_uid_235198886="43">    <SPAN class=hps zd="null" closure_uid_235198886="1391">la belle</SPAN>     <SPAN class=hps zd="null" closure_uid_235198886="1392">courbe de</SPAN>     <BR zd="null" closure_uid_235198886="1410">    <SPAN class=hps zd="null" closure_uid_235198886="1399">Parfait comme</SPAN>     <SPAN class=hps zd="null" closure_uid_235198886="1400">cadeau pour votre amoureux</SPAN>    <BR zd="null" closure_uid_235198886="1411">    <SPAN class=hps zd="null" closure_uid_235198886="1401">NOTE</SPAN>    <SPAN zd="null" closure_uid_235198886="1402">: Laver</SPAN>     <SPAN class=hps zd="null" closure_uid_235198886="1403">&agrave; la main</SPAN>   </SPAN> <LI>TXT;echo strip_tags($s, '<li><br>');

Copy after login

$str1 = '<LI>      <SPAN id=result_box lang=fr c="4" a="undefined" zd="null" closure_uid_235198886="43">        <SPAN class=hps zd="null" closure_uid_235198886="1391">la belle</SPAN>        <SPAN class=hps zd="null" closure_uid_235198886="1392">courbe de</SPAN>        <BR zd="null" closure_uid_235198886="1410">        <SPAN class=hps zd="null" closure_uid_235198886="1399">Parfait comme</SPAN>        <SPAN class=hps zd="null" closure_uid_235198886="1400">cadeau pour votre amoureux</SPAN>        <BR zd="null" closure_uid_235198886="1411">        <SPAN class=hps zd="null" closure_uid_235198886="1401">NOTE</SPAN>        <SPAN zd="null" closure_uid_235198886="1402">: Laver</SPAN>        <SPAN class=hps zd="null" closure_uid_235198886="1403">&agrave; la main</SPAN>      </SPAN>    <LI>';$reg = "/<span(.*)>|<\/span>|zd=\"(.*)\"|closure_uid_235198886=\"(.*)\"/iU";$str = preg_replace($reg, '', $str1);var_dump($str);exit;

Copy after login

$str1 = '<LI>      <SPAN id=result_box lang=fr c="4" a="undefined" zd="null" closure_uid_235198886="43">        <SPAN class=hps zd="null" closure_uid_235198886="1391">la belle</SPAN>        <SPAN class=hps zd="null" closure_uid_235198886="1392">courbe de</SPAN>        <BR zd="null" closure_uid_235198886="1410">        <SPAN class=hps zd="null" closure_uid_235198886="1399">Parfait comme</SPAN>        <SPAN class=hps zd="null" closure_uid_235198886="1400">cadeau pour votre amoureux</SPAN>        <BR zd="null" closure_uid_235198886="1411">        <SPAN class=hps zd="null" closure_uid_235198886="1401">NOTE</SPAN>        <SPAN zd="null" closure_uid_235198886="1402">: Laver</SPAN>        <SPAN class=hps zd="null" closure_uid_235198886="1403">&agrave; la main</SPAN>      </SPAN>    <LI>';$reg = "/<span(.*)>|<\/span>|zd=\"(.*)\"|closure_uid_235198886=\"(.*)\"/iU";$str = preg_replace($reg, '', $str1);var_dump($str);exit;

Copy after login

这个没有把
里面的冗余代码去掉。

$s =<<< TXT<LI>  <SPAN id=result_box lang=fr c="4" a="undefined" zd="null" closure_uid_235198886="43">    <SPAN class=hps zd="null" closure_uid_235198886="1391">la belle</SPAN>     <SPAN class=hps zd="null" closure_uid_235198886="1392">courbe de</SPAN>     <BR zd="null" closure_uid_235198886="1410">    <SPAN class=hps zd="null" closure_uid_235198886="1399">Parfait comme</SPAN>     <SPAN class=hps zd="null" closure_uid_235198886="1400">cadeau pour votre amoureux</SPAN>    <BR zd="null" closure_uid_235198886="1411">    <SPAN class=hps zd="null" closure_uid_235198886="1401">NOTE</SPAN>    <SPAN zd="null" closure_uid_235198886="1402">: Laver</SPAN>     <SPAN class=hps zd="null" closure_uid_235198886="1403">&agrave; la main</SPAN>   </SPAN> <LI>TXT;echo strip_tags($s, '<li><br>');

Copy after login

因为我的$s前后都还有HTML代码，这里只是截取了需要替换的部分字符串，所以不能用这种方法，只能用正则。

$patterns = array(
    '/]*>/i',
    '//i',
    '/
]*>/i',
);
$replace = array(
    '',
    '',
    '
',
);
echo preg_replace($patterns, $replace, $str);

这个不错。

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