用正则表达式在PHP中提取HTML属性 [英] Extract HTML attributes in PHP with regex
本文介绍了用正则表达式在PHP中提取HTML属性的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想从PHP的字符串获取HTML属性,但失败:
I want to get HTML attributes from string with PHP but fail with:
$string = '<ul id="value" name="Bob" custom-tag="customData">';
preg_filter("/(\w[-\w]*)=\"(.*?)\"/", '$1', $string ); // returns "<ul id name custom-tag"
preg_filter("/(\w[-\w]*)=\"(.*?)\"/", '$1', $string ); // returns "<ul value Bob customData"
我想返回的是:
array(
'id' => 'value',
'name' => 'Bob',
'custom-tag' => 'customData'
);
推荐答案
HTML不是正规语言,无法正确解析与正则表达式。改用DOM解析器。以下是使用PHP内置的 DOMDocument
类的解决方案:
HTML is not a regular language and cannot be correctly parsed with a regex. Use a DOM parser instead. Here's a solution using PHP's built-in DOMDocument
class:
$string = '<ul id="value" name="Bob" custom-tag="customData">';
$dom = new DOMDocument();
$dom->loadHTML($string);
$result = array();
$ul = $dom->getElementsByTagName('ul')->item(0);
if ($ul->hasAttributes()) {
foreach ($ul->attributes as $attr) {
$name = $attr->nodeName;
$value = $attr->nodeValue;
$result[$name] = $value;
}
}
print_r($result);
输出:
Array
(
[id] => value
[name] => Bob
[custom-tag] => customData
)
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