正規表現を見つけるのは難しいです。どうすれば解決できますか?

正規表現を探しています。難しいです

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$content = '<td align="right">  <b>[1]</b>  <br />
 <a href=Store.aspx?SessionCode=58152D67C1C34905B5155F2FDE0B0DE5&toc=136337:770291^2^1|136337^0^752&GetProducts=1&SelectedAttributes=33111116327|741&PRL=1_232.22%257e588.14%257e%2524232.22%2b%2b-%2b%2b%2524588.14%2b(369)_2_588.69%257e729.2%257e%2524588.69%2b%2b-%2b%2b%2524729.20%2b(371)_3_729.99%257e879.64%257e%2524729.99%2b%2b-%2b%2b%2524879.64%2b(372)_4_880.85%257e1078.2467%257e%2524880.85%2b%2b-%2b%2b%25241%252c078.25%2b(369)_5_1079%257e1342.88%257e%25241%252c079.00%2b%2b-%2b%2b%25241%252c342.88%2b(370)_6_1343.28%257e1623.3%257e%25241%252c343.28%2b%2b-%2b%2b%25241%252c623.30%2b(369)_7_1623.66%257e1824.59%257e%25241%252c623.66%2b%2b-%2b%2b%25241%252c824.59%2b(369)_8_1825.2%257e2140.7%257e%25241%252c825.20%2b%2b-%2b%2b%25242%252c140.70%2b(369)_9_2142.24%257e2609.81%257e%25242%252c142.24%2b%2b-%2b%2b%25242%252c609.81%2b(370)_10_2613.21%257e31877.92%257e%25242%252c613.21%2b%2b-%2b%2b%252431%252c877.92%2b(349)&pgno=2>2</a>  <br />
<a href=Store.aspx?SessionCode=58152D67C1C34905B5155F2FDE0B0DE5&toc=136337:770291^2^1|136337^0^752&GetProducts=1&SelectedAttributes=33111116327|741&PRL=1_232.22%257e588.14%257e%2524232.22%2b%2b-%2b%2b%2524588.14%2b(369)_2_588.69%257e729.2%257e%2524588.69%2b%2b-%2b%2b%2524729.20%2b(371)_3_729.99%257e879.64%257e%2524729.99%2b%2b-%2b%2b%2524879.64%2b(372)_4_880.85%257e1078.2467%257e%2524880.85%2b%2b-%2b%2b%25241%252c078.25%2b(369)_5_1079%257e1342.88%257e%25241%252c079.00%2b%2b-%2b%2b%25241%252c342.88%2b(370)_6_1343.28%257e1623.3%257e%25241%252c343.28%2b%2b-%2b%2b%25241%252c623.30%2b(369)_7_1623.66%257e1824.59%257e%25241%252c623.66%2b%2b-%2b%2b%25241%252c824.59%2b(369)_8_1825.2%257e2140.7%257e%25241%252c825.20%2b%2b-%2b%2b%25242%252c140.70%2b(369)_9_2142.24%257e2609.81%257e%25242%252c142.24%2b%2b-%2b%2b%25242%252c609.81%2b(370)_10_2613.21%257e31877.92%257e%25242%252c613.21%2b%2b-%2b%2b%252431%252c877.92%2b(349)&pgno=3>3</a><br />
<a href="Store.aspx?SessionCode=58152D67C1C34905B5155F2FDE0B0DE5&toc=136337:770291^2^1|136337^0^752&GetProducts=1&SelectedAttributes=33111116327|741&PRL=1_232.22%257e588.14%257e%2524232.22%2b%2b-%2b%2b%2524588.14%2b(369)_2_588.69%257e729.2%257e%2524588.69%2b%2b-%2b%2b%2524729.20%2b(371)_3_729.99%257e879.64%257e%2524729.99%2b%2b-%2b%2b%2524879.64%2b(372)_4_880.85%257e1078.2467%257e%2524880.85%2b%2b-%2b%2b%25241%252c078.25%2b(369)_5_1079%257e1342.88%257e%25241%252c079.00%2b%2b-%2b%2b%25241%252c342.88%2b(370)_6_1343.28%257e1623.3%257e%25241%252c343.28%2b%2b-%2b%2b%25241%252c623.30%2b(369)_7_1623.66%257e1824.59%257e%25241%252c623.66%2b%2b-%2b%2b%25241%252c824.59%2b(369)_8_1825.2%257e2140.7%257e%25241%252c825.20%2b%2b-%2b%2b%25242%252c140.70%2b(369)_9_2142.24%257e2609.81%257e%25242%252c142.24%2b%2b-%2b%2b%25242%252c609.81%2b(370)_10_2613.21%257e31877.92%257e%25242%252c613.21%2b%2b-%2b%2b%252431%252c877.92%2b(349)&pgno=188">Last</a></td>';<br />
 $a = preg_match_all('/a href([\S])*/is', $content, $matches);<br />
 print_r($matches);<br />

専門家の皆様、正規表現を使用して pgno の配列を抽出する方法はありますか?
ハイパーリンク href最後のもの&
ひざまずいて懇願してください。

-----解決策---------

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<br>
$content = '<td align="right" <b>[1]</b><br>
<a href=Store.aspx?SessionCode=58152D67C1C34905B5155F2FDE0B0DE5&toc=136337:770291^2^1<br><font color='#FF8000'>-----解決策---------------- - ---</font><br>136337^0^752&GetProducts=1&SelectedAttributes=33111116327<br><font color='#FF8000'>-----解決策------ -</font><br>741&PRL=1_232.22%7e588.14%7e%24232.22++-++%24588.14+(369)_2_588.69%7e729.2%7e%24588.69++-++% 24729.20+ (371)_3_729.99%7e879.64%7e%24729.99++-++%24879.64+(372)_4_880.85%7e1078.2467%7e%24880.85++-++%241%2c078.25+ (369) )_5_1079%7e1342.88%7e%241%2c079.00++-++%241%2c342.88+(370)_6_1343.28%7e1623.3%7e%241%2c343.28++-+ +% 241%2c623.30+(369)_7_1623.66%7e1824.59%7e%241%2c623.66++-++%241%2c824.59+(369)_8_1825.2%7e2140.7%7e %241 %2c825.20++-++%242%2c140.70+(369)_9_2142.24%7e2609.81%7e%242%2c142.24++-++%242%2c609.81+(370 )_10_2613 .21%7e31877.92%7e%242%2c613.21++-++%2431%2c877.92+(349)&pgno=2>2</a> <div class="clear"></div>