Question

php正则表达式提取网页数据(无数据是用－表示的),/(\d+)\.(\d+)/is只能提取带小数的数据,－提不了，请教

代码如下：
<tr >
<td class="borderLeft bright">客胜</td>
<td class="borderLeft"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">22.90</span></a></td>
<td><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">70.76</span></a></td>
<td class="bright"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">31.17</span></a></td>

<td class="borderLeft"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">136.47</span></a></td>
<td><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">84.64</span></a></td>
<td class="bright"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">104.48</span></a></td>

<td class="borderLeft"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">382.12</span></a></td>
<td><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">222.90</span></a></td>
<td><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">290.74</span></a></td>
<td class="bright"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="">-</span></a></td>

</tr>
<tr class="avgobjH">
<td rowspan="2" align="left" class="borderRight"> </td>
<td class="borderLeft borderRight" rowspan="2">平均值</td>
<td class="borderLeft bright">主胜</td>

<td class="borderLeft">5.66</td>
<td>6.23</td>
<td class="bright">8.34</td>

<td class="borderLeft">12.19</td>
<td>14.16</td>
<td class="bright">36.58</td>

<td class="borderLeft">30.70</td>
<td>35.57</td>
<td>63.22</td>
<td class="bright">75.00</td>

<td rowspan="2" class="borderLeft">10.16</td>
<td rowspan="2" class="">8.28</td>
<td rowspan="2" class="">26.80</td>
<td rowspan="2" class="">116.67</td>
<td rowspan="2" class="">300.00</td>
</tr>
我把代码再简化一下，大概如下：我需要提取的是凡是在<td></td>中的数据，以下代码处理出来的结果应该是：22.90 ，290.74，－，300.00
<tr >
<td class="borderLeft bright">客胜</td>
<td class="borderLeft"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">22.90</span></a></td>
<td><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">290.74</span></a></td>

<td class="bright"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="">-</span></a></td>
</tr>
<tr class="avgobjH">
<td rowspan="2" align="left" class="borderRight"> </td>
<td rowspan="2" class="">300.00</td>

</tr>

Answer 1

是要获取 所有 <span class="bblacktxt">XXXXXXXXXXX</span>里面的 数值 ，

还是 这个页面 里面 的所有数值？

$str =<<<DEO
<tr >  
   <td class="borderLeft bright">客胜</td>  
   <td class="borderLeft"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">22.90</span></a></td>  
<td><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="bblacktxt">290.74</span></a></td>
   <td class="bright"><a href='/soccer/match/579818/cs/change/236/' target='_blank'><span class="">-</span></a></td>  
   </tr>  
   <tr class="avgobjH">  
   <td rowspan="2" align="left" class="borderRight"> </td>  
<td rowspan="2" class="">300.00</td>
   </tr>
DEO;
$preg = '/>(\d+\.\d+)</';
preg_match_all($preg,$str,$match);
var_dump($match);

追问

不仅仅是XXXXXXXXXXX里面的 数值,还有部分是XXXX

追答

  用这个正则 都行的

$str =<<<DEO
<tr class="avgobjH">
<td rowspan="2" align="left" class="borderRight"> </td>
<td class="borderLeft borderRight" rowspan="2">平均值</td>
<td class="borderLeft bright">主胜</td>

<td class="borderLeft">5.66</td>
<td>6.23</td>
<td class="bright">8.34</td>

<td class="borderLeft">12.19</td>
<td>14.16</td>
<td class="bright">36.58</td>

<td class="borderLeft">30.70</td>
<td>35.57</td>
<td>63.22</td>
<td class="bright">75.00</td>

<td rowspan="2" class="borderLeft">10.16</td>
<td rowspan="2" class="">8.28</td>
<td rowspan="2" class="">26.80</td>
<td rowspan="2" class="">116.67</td>
<td rowspan="2" class="">300.00</td>
</tr>
DEO;
$preg = '/>(\d+\.\d+)</';
preg_match_all($preg,$str,$match);
var_dump($match);

追问

问题是有些数据是空的，以横杠“－”来表示的就提取不了了

追答

改一下正则模式
$preg = '/>(\d+\.\d+|-)</is';

Answer 2

这个就取出了所有的2位小数的数字 要表格里的 正则换下 #>300.00</td><\/td>#is

擦，百度的显示太不好用了

<?php
$con = stripslashes(file_get_contents('t.htm')); #t.htm是上面的内容，如果开了转义，就反转一下
preg_match_all('#[0-9]{1,5}\.[0-9]{1,2}#is',$con,$num);
print_r($num);

追问

问题是有些数据是空的，以横杠“－”来表示的就提取不了了