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<?php $text="('x-csrf-token', 'whatever')"; preg_match("/x-csrf-token',\s*'([^']+)/mi",$text,$matches); $token=$matches[1]; var_dump($token);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
string(8) "whatever"

preferences:
92.44 ms | 1238 KiB | 4 Q