我有一个脚本可以抓取覆盖和重新标记代码，但我需要帮助检测转换ID，例如：
<!-- Google Code for current client Remarketing List -->
<script type="text/javascript">
/* <![CDATA[ */
var google_conversion_id = 1057577648;
var google_conversion_language = "en";
var google_conversion_format = "3";
var google_conversion_color = "666666";
var google_conversion_label = "FJ8sCKCE9wEQsLWl-AM";
var google_conversion_value = 0;
/* ]]> */
需要像这样的正则表达式：
$gaRegExp = "Regex Here";
preg_match( $gaRegExp , $str , $matches);
$conversion_id = $matches;
试试这个
$subject = 'var google_conversion_id = 1057577648;
var google_conversion_language = "en";
var google_conversion_format = "3";
var google_conversion_color = "666666";
var google_conversion_label = "FJ8sCKCE9wEQsLWl-AM";
var google_conversion_value = 0;';
$pattern = '!(?<=google_conversion_id's'='s)'d+!';
preg_match($pattern, $subject, $matches);
print_r($matches);
输出：
Array ( [0] => 1057577648 )
获取元素$conversion_id=$matches[0];