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正则匹配指定长度的数字要如何写

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Release: 2016-06-13 13:36:14
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正则匹配指定长度的数字要怎么写?

1234567890
1234567890123
0987654321
3210987654321
1324354657
1324354657689
我只想匹配其中长度为10的那些数字,我要怎么写正则?

------解决方案--------------------
PHP code

$str=1234567890
<td>1234567890123</td>
<td>0987654321</td>
<td>3210987654321</td>
<td>1324354657</td>
<td>1324354657689</td>
htm;

preg_match('/(<td>[\d]{10})/',$str,$match);
print_R ($match[1]);
<br><font color="#e78608">------解决方案--------------------</font><br><dl class="code">PHP code<pre class="brush:php;toolbar:false">
<?php $str=<<<htm
<td>1234567890
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1234567890123 0987654321 3210987654321 1324354657 1324354657689 htm; preg_match_all('/([\d]{10}\b)/',$str,$match); print_R ($match[1]);
------解决方案--------------------
PHP code
preg_match_all('/<td>(\d{10}\b)/',$str,$matchs);
print_r ($matchs);
<br><font color="#e78608">------解决方案--------------------</font><br>把函数改成 preg_match_all 就行了<br><br>preg_match_all('/(</td><td>[\d]{10})/',$str,$match);<br><br> <div class="clear">
                 
              
              
        
            </div>
</td>
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