How can PHP files be secured to prevent unauthorized access from external sources?

To secure PHP files and prevent unauthorized access from external sources, you can use an .htaccess file to restrict access to specific directories or files. This can be done by denying access to all users except for those with specific IP addresses, or by requiring a password for access. 

# .htaccess file to restrict access to PHP files
<FilesMatch "\.php$">
    Order allow,deny
    Deny from all
</FilesMatch>

Keywords

PHP file permissions .htaccess authentication security

Related Questions