Attackers often use psychological triggers to lure users into interacting with these scripts: Stack Overflow Facebook phishing detection - Stack Overflow

: Advanced scripts may include "CrawlerDetect" or IP blacklists ( badAgents.php ) to identify and block security bots, crawlers, or security researchers from seeing the fake page.

: Some scripts use cURL to immediately try the credentials on the real Facebook site to verify if they work or to maintain a persistent session.

: The script uses fopen() and fwrite() to save the submitted $_POST data (email and password) to a hidden text file or CSV on the attacker's server.

Phishing kits use simple but effective PHP functions to harvest data. Common features include:

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