如何在PhpQuery中使用Foreach？

时间：2011-01-05 10:07:46

标签： php arrays foreach phpquery

我正在尝试使用PhpQuery解析一些html，但这对我来说并不容易......

我只需要将URL（href标签）提取到数组，但它不起作用。

请参阅此代码仅用于示例目的：

$doc = phpQuery::newDocumentHTML('<div align = "left" style="background-color:#FFFFFF;border:1px solid #C3D9FF"> </p>

        <table cellPadding="2" cellSpacing="0" width="100%" height="60" style="border-collapse: collapse; ">

          <tr>
            <td align="left" width="531" height="20"><small>
            <strong>

            <a href="/1153414/">

            <font style="FONT-SIZE: 13px; LINE-HEIGHT: 14px">Industrial</font><a/> </a></small></strong>
            </td>

          </tr>
          <tr>
            <td align="left" vAlign="top" width="100%" height="1">
            <table align="left" border="0" cellPadding="0" cellSpacing="0" width="736">
              <tr>
                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">
                Data:</font></strong></td>

                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;4-1-2011 </font></td>
                <td align="left" vAlign="top" width="59">
                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Zona:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp; Castelo Branco</font></td>

              </tr>
              <tr>
                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Categoria:</font></strong></td>
                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Indústria / Produção </font></td>
                <td align="left" vAlign="top" width="59">

                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Empresa:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Isotransfo, Unipessoal LDA</font></td>
              </tr>
              </table>
            </td>

          </tr>
        </table>

 </p>

        <table cellPadding="2" cellSpacing="0" width="100%" height="60" style="border-collapse: collapse; ">
          <tr>
            <td align="left" width="531" height="20"><small>
            <strong>

            <a href="/1153399/">

            <font style="FONT-SIZE: 13px; LINE-HEIGHT: 14px">Admite-se<a/> </a> </font></small></strong>
            </td>
          </tr>
          <tr>
            <td align="left" vAlign="top" width="100%" height="1">
            <table align="left" border="0" cellPadding="0" cellSpacing="0" width="736">

              <tr>
                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">
                Data:</font></strong></td>
                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;4-1-2011 </font></td>
                <td align="left" vAlign="top" width="59">

                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Zona:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp; Castelo Branco</font></td>
              </tr>
              <tr>

                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Categoria:</font></strong></td>
                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Indústria / Produção </font></td>
                <td align="left" vAlign="top" width="59">
                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">

                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Empresa:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Isotransfo, Unipessoal LDA</font></td>
              </tr>
              </table>
            </td>
          </tr>
        </table>

 </p>

        <table cellPadding="2" cellSpacing="0" width="100%" height="60" style="border-collapse: collapse; ">
          <tr>
            <td align="left" width="531" height="20"><small><font face="Arial">
            <strong>

            <a href="/1153280/">

            <font style="FONT-SIZE: 13px; LINE-HEIGHT: 14px">Precisa-se</font><a/> </a> </font></small></strong>

            </td>
          </tr>
          <tr>
            <td align="left" vAlign="top" width="100%" height="1">
            <table align="left" border="0" cellPadding="0" cellSpacing="0" width="736">
              <tr>
                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">

                Data:</font></strong></td>
                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;4-1-2011 </font></td>
                <td align="left" vAlign="top" width="59">
                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Zona:</font></strong></td>

                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp; ( Todas as Zonas )</font></td>
              </tr>
              <tr>
                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Categoria:</font></strong></td>

                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Saúde / Medicina / Enfermagem </font></td>
                <td align="left" vAlign="top" width="59">
                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Empresa:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Emprego Radiologia</font></td>

              </tr>
              </table>
            </td>
          </tr>
        </table>

 </p>

        <table cellPadding="2" cellSpacing="0" width="100%" height="60" style="border-collapse: collapse; ">
          <tr>

            <td align="left" width="531" height="20"><small><font face="Arial">
            <strong>

            <a href="/1152665/">

            <font style="FONT-SIZE: 13px; LINE-HEIGHT: 14px">Operadores</font><a/> </a> </font></small></strong>
            </td>
          </tr>

          <tr>
            <td align="left" vAlign="top" width="100%" height="1">
            <table align="left" border="0" cellPadding="0" cellSpacing="0" width="736">
              <tr>
                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">
                Data:</font></strong></td>

                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;4-1-2011 </font></td>
                <td align="left" vAlign="top" width="59">
                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Zona:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp; Viseu</font></td>

              </tr>
              <tr>
                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Categoria:</font></strong></td>
                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Lojas / Comércio / Balcão </font></td>
                <td align="left" vAlign="top" width="59">

                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Empresa:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Dia Portugal Supermercados - Soc. Unip., Lda.</font></td>
              </tr>
              </table>
            </td>

          </tr>
        </table>

 </p>

        <table cellPadding="2" cellSpacing="0" width="100%" height="60" style="border-collapse: collapse; ">
          <tr>
            <td align="left" width="531" height="20"><small><font face="Arial">
            <strong>

            <a href="/1153524/">

            <font style="FONT-SIZE: 13px; LINE-HEIGHT: 14px">Responsável</font><a/> </a> </font></small></strong>
            </td>
          </tr>
          <tr>
            <td align="left" vAlign="top" width="100%" height="1">
            <table align="left" border="0" cellPadding="0" cellSpacing="0" width="736">

              <tr>
                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">
                Data:</font></strong></td>
                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;4-1-2011 </font></td>
                <td align="left" vAlign="top" width="59">

                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Zona:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp; Santarem</font></td>
              </tr>
              <tr>

                <td align="left" vAlign="top" width="67">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">
                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Categoria:</font></strong></td>
                <td align="left" vAlign="top" width="150">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;Comercial / Vendas </font></td>
                <td align="left" vAlign="top" width="59">
                <font color="#000000" face="Arial" size="2">
                <strong style="FONT-SIZE: 11px; LINE-HEIGHT: 14px; font-weight:400">

                <font face="Arial" color="#333333" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">Empresa:</font></strong></td>
                <td align="left" vAlign="top" width="473">
                <font face="Arial" style="FONT-SIZE: 11px; LINE-HEIGHT: 14px">&nbsp;ALDI Supermercados Lda.</font></td>
              </tr>
              </table>
            </td>
          </tr>
        </table>
</div>');
//echo $doc['div table a']->attr('href');
foreach ($doc['div table a'] as $a) {
    $hrefs[] .= pq($a)->attr('href');
}
print_r ($hrefs);

如果我回复下面的代码，它只是我的href网址，而且没关系：

echo $doc['div table a']->attr('href');

如果我运行foreach语句，我得到一个带有一些空值的数组：

foreach ($doc['div table a'] as $a) {
    $hrefs[] .= pq($a)->attr('href');
}
print_r ($hrefs);

我得到的数组是：

Array ( 
    [0] => /1153414/ 
    [1] => 
    [2] => /1153399/ 
    [3] => 
    [4] => /1153280/ 
    [5] => 
    [6] => /1152665/ 
    [7] => 
    [8] => /1153524/ 
    [9] => 
    )

如何生成这样的数组：

Array ( 
    [0] => /1153414/ 
    [1] => /1153399/ 
    [2] => /1153280/ 
    [3] => /1152665/ 
    [4] => /1153524/ 
    )

如果你能给我一些线索，我将不胜感激。

抱歉我的英文不好

最诚挚的问候，

2 个答案:

答案 0 :(得分：3)

您的代码中有五个<a/>个实例。这会创建一个空a元素，而不是关闭现有元素。删除它们，你的代码应该可以正常工作。

编辑从数组中删除空值的一种非常简单的方法是运行array_filter而没有第二个参数：

$hrefs = array_filter($hrefs);

答案 1 :(得分：1)

if (pq($a)->attr('href') != '') {
   $hrefs[] .= pq($a)->attr('href');
}
相关问题
最新问题