PHP Regex匹配，匹配所有以数字开头，后跟句点的行

我曾使用simple_html_dom来解析一些HTML，并在一个名为的数组中包含以下HTML表$pre

现在，如何使用PHP正则表达式仅获取与以下结果匹配的行？

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            <pre>1.   APEAL/890/2010     HUSSAIN ISMAIL SATWILKAR        SHRI C.K. PENDSE</pre>
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            <pre>     [Criminal]                                         MS.ROHINI DANDEKAR ADV.AP</pre>
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            <pre>                        V/S THE STATE OF MAHARASH       PTD AS PER CTS ORD 7/9/17</pre>
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            <pre>                        TRA                             P.P.FOR  P. P</pre>
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            <pre></pre>
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            <pre>        REMARK : (By Accused against Conviction) Note: (1) Matter is Ready for final</pre>
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            <pre>                 hearing. (2) Accd. is in jail. (3) R & P with PB received. (4)</pre>
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            <pre>                 Muddemal article are to be called for. (5) Report received from</pre>
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            <pre>                 Nashik Central Prison stated therein that "Orig. accd. death dated</pre>
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            <pre>                 20/11/2015 (Report kept at flag "A") . ....... Court (DB) for final</pre>
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            <pre>                 hearing.</pre>
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            <pre></pre>
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            <pre></pre>
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            <pre></pre>
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            <pre>2.   APEAL/966/2011     ABDUL MALIK SHAIKH              SHRI S. R. MITHARE</pre>
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            <pre>     [Criminal]</pre>
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            <pre>                        V/S THE STATE OF MAHARASH</pre>
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            <pre>                        TRA</pre>
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        <td>
            <pre></pre>
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        <td>
            <pre>        REMARK : (By Accused Against Conviction) Note:- (1) Matter is ready for</pre>
        </td>
    </tr>
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        <td>
            <pre>                 Final Hearing. (2) Original Accused is in Jail. (3) R & P received</pre>
        </td>
    </tr>
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        <td>
            <pre>                 with PaperBooks. (4) Muddemal Articles are to be called for. (5)</pre>
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            <pre>                 Report received from Kolhapur central Prison stated therein that</pre>
        </td>
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            <pre>                 "Orig. Accused expired on 19/04/2015 (Report kept at flag "A")</pre>
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            <pre>                 - Court D.B. for Final Hearing.</pre>
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        <td>
            <pre></pre>
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        <td>
            <pre></pre>
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        <td>
            <pre></pre>
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            <pre>3.   APEAL/486/2012     AJAY SITARAM BHARATI            MISS. TANU KHATTRI</pre>
        </td>
    </tr>
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        <td>
            <pre>     [Criminal]</pre>
        </td>
    </tr>
</table>

使用Regex后的结果：

<pre>1.   APEAL/890/2010     HUSSAIN ISMAIL SATWILKAR        SHRI C.K. PENDSE</pre>
<pre>2.   APEAL/966/2011     ABDUL MALIK SHAIKH              SHRI S. R. MITHARE</pre>
<pre>3.   APEAL/486/2012     AJAY SITARAM BHARATI            MISS. TANU KHATTRI</pre>

使用此代码：preg_match('^\<pre\>\d2*\./gm', $pre[$i])返回：preg_match(): No ending delimiter '^' found

这看起来像要使用的正确正则表达式，来自regex101：

^ asserts position at start of the string
\< matches the character < literally (case sensitive)
pre matches the characters pre literally (case sensitive)
\> matches the character > literally (case sensitive)
\d matches a digit (equal to [0-9])
    2* matches the character 2 literally (case sensitive)
    * Quantifier — Matches between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\. matches the character . literally (case sensitive)

Global pattern flags
g modifier: global. All matches (don't return after first match)