如何使用preg_match()从表单获取输入字段值

Question

我不是这个领域的专家,所以请帮助我,不管我的无知,如果有的话.我试图卷曲一个页面,并希望获得隐藏<input>字段的价值.我对regexp不熟悉.我的代码如下:

       $page = curl_exec($ch);
}
curl_close($ch);

function parse_form_fields($page, $username, $password){
    preg_match("/<input id=\"signuptoken\" type=\"hidden\" value=\"(.+?)\" name=\"signuptoken\"/", $page, $m);

    $captchatoken = $m[1];

    $parameters[] = "newaccounttoken=" . urlencode($captchatoken);
}

表格字段如下:

<input id="signuptoken" type="hidden" value="03AHJ_Vuv2ts6ev2LltAkZB91vjD6k-BsW3286bTC9QZYZLSHQUMNDQJFUaNmAQMAYb9FDhIkOFzAisafasfsTZuv_pl5KvkYNfsGUPcOAEX5YPlMaMOi7MZJq4ky0v_GyM60SmMgjPrtfZSJYE0hqw--GsfsafasmER0Sksr6OAvnLnBVAMsKcCi7uM" name="signuptoken">

我想获得此输入字段的值.

Answer 1

你最好使用DOMDocument.例如:

$html = '<input id="signuptoken" type="hidden" value="03AHJ_Vuv2ts6ev2LltAkZB91vjD6k-BsW3286bTC9QZYZLSHQUMNDQJFUaNmAQMAYb9FDhIkOFzAisafasfsTZuv_pl5KvkYNfsGUPcOAEX5YPlMaMOi7MZJq4ky0v_GyM60SmMgjPrtfZSJYE0hqw--GsfsafasmER0Sksr6OAvnLnBVAMsKcCi7uM" name="signuptoken">';
$dom = new DomDocument();
$dom->loadHTML($html);

$signuptoken = $dom->getElementById("signuptoken");
echo $signuptoken->getAttribute('value');