用PHP解析键值跨度对[重复]

Question

可能重复：
How to parse and process HTML with PHP?

我有一堆代码需要搜索并获取此类数据

<span class="parameter-name-value">
    <span class="parameter-name">....</span> 
    <span class="parameter-value">....</span>
</span>

以

格式写入 PHP 数组

$array = array(
    array("parameter-name", "parameter-value"),
    array("parameter-name", "parameter-value"),
    array("parameter-name", "parameter-value")
)

我需要什么样的正则表达式？

Answer 1

这将是您的设置：

function get_tags($string, $start, $end)
{
    $start = str_replace("\\", "\\\\", $start);
    $start = str_replace("/", "\/", $start);
    $end   = str_replace("\\", "\\\\", $end);
    $end   = str_replace("/", "\/", $end);
    preg_match_all("/{$start}(.*?){$end}/si", $string, $matching_data);
    return $matching_data[0];
}

function return_between($string, $start, $stop, $type)
{
    $temp = split_string($string, $start, false, $type);
    return split_string($temp, $stop, true, $type);
}

function get_attribute($tag, $attribute)
{   
    // Remove all line feeds from the string
    $cleaned_html = str_replace("\r", "", $tag);   
    $cleaned_html = str_replace("\n", "", $cleaned_html);

    // Use return_between() to find the properly quoted value for the attribute
    return return_between($cleaned_html, $attribute."=\"", "\"", true);
}

要使用它，像这样：

$open_tag = '<span';
$close_tag = '>';

$span_tags = get_tags($html_string, $open_tag, $close_tag);
$span_tag_class_names = array();

foreach ($span_tags as $key => $tag) {
    $class_name = get_attribute($tag, $attribute = "class");
    if (!empty($class_name)) {
        $span_tag_class_names[] = $class_name;
    }
}

print_r($span_tag_class_names);

与所有正则表达式一样，您的里程可能会有所不同。

Answer 2

如果您知道您的数据将与您呈现的完全一样，并且永远不会改变，那么使用正则表达式比加载 XML 库更快更容易。但请记住，无需进行太多更改即可使其失败。 XML 解析器解决方案更加健壮。

$data = '<span class="parameter-name-value">
    <span class="parameter-name">A</span>
    <span class="parameter-value">x</span>
</span>
<span class="parameter-name-value">
    <span class="parameter-name">B</span>
    <span class="parameter-value">y</span>
</span>
<span class="parameter-name-value">
    <span class="parameter-name">C</span>
    <span class="parameter-value">z</span>
</span>
';

$pattern = '@<span class=\"parameter-name-value\">
    <span class=\"parameter-name\">(.*)</span>
    <span class=\"parameter-value\">(.*)</span>
</span>@';

preg_match_all($pattern, $data, $matches);
list($_, $keys, $values) = $matches;
$result = array_combine($keys, $values);
print_r($result);

输出

Array
(
    [A] => x
    [B] => y
    [C] => z
)

Answer 3

你的HTML不清楚但可以使用DOMDocument不管格式

$html = '<span class="parameter-name-value">
    <span class="parameter-name">A</span> 
    <span class="parameter-value">1</span>
</span>
<span class="parameter-name-value">
    <span class="parameter-name">B</span> 
    <span class="parameter-value">2</span>
</span>';

$dom = new DOMDocument();
$dom->loadHTML($html);

$xpath = new DOMXPath($dom);
$span = $xpath->query("//span/span");

    $dom = new DOMDocument();
$dom->loadHTML($html);

$xpath = new DOMXPath($dom);
$span = $xpath->query("//span/span");

$list = array();
$list2 = array();

for($i = 0; $i < $span->length; $i += 2) {
    $name = $span->item($i);
    $value = $span->item($i + 1);
    $list[] = array($name->getAttribute('class') => $name->nodeValue,$value->getAttribute('class') => $value->nodeValue);
    $list2[] = array($name->getAttribute('class'),$value->getAttribute('class'));
}

var_dump($list);
var_dump($list2);

输出$list

array
  0 => 
    array
      'parameter-name' => string 'A' (length=1)
      'parameter-value' => string '1' (length=1)
  1 => 
    array
      'parameter-name' => string 'B' (length=1)
      'parameter-value' => string '2' (length=1)

输出$list2

array
  0 => 
    array
      0 => string 'parameter-name' (length=14)
      1 => string 'parameter-value' (length=15)
  1 => 
    array
      0 => string 'parameter-name' (length=14)
      1 => string 'parameter-value' (length=15)