int(0)
string(637) "<a href="https://wappass.baidu.com/static/captcha/tuxing_v2.html?&amp;logid=11040656423442053463&amp;ak=c27bbc89afca0463650ac9bde68ebe06&amp;backurl=https%3A%2F%2Fwww.baidu.com%2Fs%3Fwd%3Dsite%253Azhihu.com%2B%E5%8A%A0%E5%B7%A5%E7%94%B5%E6%9C%BA%26tn%3D87048150_dg%26ie%3Dutf8&amp;ext=x9G9QDmMXq%2FNo87gjGO0P7s%2FKCFs%2BEjkLzJzLlUj9cWRefc3eGtarOGqhes%2BYoPEUgqUK9LXd1cIlztrhMwiv9y2sa3otwgK7oQr%2FqxqAQ%2FzWoJZOP0E38PLk%2BXUoMtNSCAe1EQ3IsG%2BFn2u6CQ8X05Ahg%2FRr4Gur8cJ9eIB%2BON9JNSUZ6k2MNbu1%2Buj%2FNxt2FsZmiqxzKKuO%2FJIL0Rm3Y7NbrGlfKws9%2BbomBJLYyg%3D&amp;signature=f6b6f89237e0c8c35eaeb22836503071&amp;timestamp=1761223665">Found</a>.

"