donglianglu8136 2015-12-10 20:41
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如何通过preg_match_all获取来自同一对象的所有匹配？ [重复]

This question already has an answer here:

I have a table:

<table class="table_class" >
    <tr>
        <td>key</td>
        <td>value</td>
    </tr>
</table>

The table may have any count of <tr>

I have regexp:

<table class="table_class">(<tr.*?><td>(.*?)</td><td>(.*?)</td></tr>){1,}</table>

But matches array contains only last match.

Just (<tr.*?><td>(.*?)</td><td>(.*?)</td></tr>) I can not do, because other table will may be.

Before apply preg_match_all I delete whitespaces. How do this? Thanks!

UPD: example with a few tables

<table>
    <tr>
        <td>key</td>
        <td>value</td>
    </tr>
</table>
<table class="table_class" >
    <tr>
        <td>key</td>
        <td>value</td>
    </tr>
</table>

yet, I will want to know why my regexp match only last <tr>))

</div>
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  • dry9192 2015-12-10 20:51
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    Now usually I'm first to say it's fine to use regexps to extract data from HTML occasionally, as it's oft just faster and more efficient to do so than using a real parser. This is not one of those cases as the structure of the HTML is more than relevant.

    Instead consider something like this:

    $doc = DOMDocument::loadHTML(<<<HTML
<table class="table_class" >
    <tr><td>key1</td><td>value1</td></tr>
    <tr><td>key2</td><td>value2</td></tr>
    <tr><td>key3</td><td>value3</td></tr>
    <tr><td>key4</td><td>value4</td></tr>
</table>
HTML
);
foreach($doc->getElementsByTagName('tr') as $row) { 
  foreach($row->getElementsByTagName('td') as $cell)
    var_dump($cell->nodeValue);
}

    See it in action here.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

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