检查来自php curl_exec（）的响应？

I have the following cUrl function call that is returning the response code.

$result = curl_exec($ch);

I need to check the $result for the following response property.

   <isValidPost>true</isValidPost>

I could always parse through and check for that exact string, but is there an alternative way to check this?

Presuming that the API is set in stone (i.e. won't change at a moment's notice), in this case it's probably safe to a simple string search

if (false !== strpos($result, '<isValidPost>true</isValidPost>')) {

However, to do this in a more reliable way, you may want to do DOM parsing:

$dom = new DOMDocument;
$dom->parseXML($result);
$isValidPostTag = $dom->getElementsByTagName('isValidPost')->item(0);
if ($isValidPostTag) {
    $isValidPost = $isValidPostTag->nodeValue == 'true';
} else {
    $isValidPost = false;
}

Are you getting XML response? Then parse the XML

$xml = new SimpleXMLElement($result);
if(isset($xml->your_element->isValidPost)){
   //do what you need
}