如何从js代码中获取字符串值

Question

I want to get the string value and later to use urldecode().

Javascript

document.write(unescape('%46%43%20%42%72%61%73%6f%76%20%76%73%2e%20%43%53%4d%53%20%49%61%73%69'));

PHP

$string = "document.write(unescape('%46%43%20%42%72%61%73%6f%76%20%76%73%2e%20%43%53%4d%53%20%49%61%73%69'));";

preg_match('/document.write(unescape(\'.*\'));/', $string,$matches);
var_dump($matches);

but this return array(0) { }

Answer 1

You can try

$string = "document.write(unescape('%46%43%20%42%72%61%73%6f%76%20%76%73%2e%20%43%53%4d%53%20%49%61%73%69'));";
preg_match('/document.write\(unescape\(\'(.*)\'\)\);/', $string,$matches);
var_dump($matches[1]);

Output

string '%46%43%20%42%72%61%73%6f%76%20%76%73%2e%20%43%53%4d%53%20%49%61%73%69' (length=69)