PHP: Function Reference - Manual
https://www.php.net/manual/en/features.dtrace.php
https://www.php.net/manual/en/features.gc.php
https://www.php.net/manual/en/features.commandline.php
https://www.php.net/manual/en/features.persistent-connections.php
https://www.php.net/manual/en/features.connection-handling.php
https://www.php.net/manual/en/features.remote-files.php
https://www.php.net/manual/en/features.file-upload.php
https://www.php.net/manual/en/features.xforms.php
https://www.php.net/manual/en/features.sessions.php
https://www.php.net/manual/en/features.cookies.php
https://www.php.net/manual/en/features.http-auth.php
https://www.php.net/manual/en/features.php
https://www.php.net/manual/en/security.current.php
https://www.php.net/manual/en/security.hiding.php
https://www.php.net/manual/en/security.variables.php
PHP: Error Reporting - Manual
https://www.php.net/manual/en/security.database.php
https://www.php.net/manual/en/security.filesystem.php
https://www.php.net/manual/en/security.sessions.php
https://www.php.net/manual/en/security.apache.php
https://www.php.net/manual/en/security.cgi-bin.php
https://www.php.net/manual/en/security.general.php
https://www.php.net/manual/en/security.intro.php
https://www.php.net/manual/en/security.php
https://www.php.net/manual/en/wrappers.php
https://www.php.net/manual/en/context.php
https://www.php.net/manual/en/reserved.interfaces.php
https://www.php.net/manual/en/reserved.exceptions.php
https://www.php.net/manual/en/reserved.variables.php