<?php

// http://php.net/manual/en/langref.php
// http://php.net/manual/en/language.variables.php
// http://php.net/manual/en/language.constants.php
// http://php.net/manual/en/language.types.string.php
// http://php.net/manual/en/language.types.array.php
// http://php.net/manual/en/language.functions.php
// http://php.net/manual/en/language.operators.increment.php
// http://php.net/manual/en/language.references.php
// http://php.net/manual/en/language.namespaces.php
// http://php.net/manual/en/language.oop5.php
// http://php.net/manual/en/language.oop5.final.php
// http://php.net/manual/en/language.oop5.interfaces.php
// http://php.net/manual/en/language.oop5.traits.php
// http://php.net/manual/en/language.oop5.typehinting.php
// http://php.net/manual/en/language.oop5.late-static-bindings.php
// http://php.net/manual/en/language.variables.superglobals.php
// http://php.net/manual/en/features.file-upload.php
// http://php.net/manual/en/ref.filesystem.php
// http://php.net/manual/en/ref.pcre.php
// http://php.net/manual/en/book.session.php
// http://php.net/manual/en/book.stream.php
// http://php.net/manual/en/book.simplexml.php
// http://php.net/manual/en/book.spl.php

// http://php.net/manual/en/reserved.interfaces.php
// http://php.net/manual/en/class.closure.php

// http://php.net/manual/en/security.php
// http://en.wikipedia.org/wiki/XML_schema
// http://en.wikipedia.org/wiki/List_of_HTTP_status_codes
// http://en.wikipedia.org/wiki/Join_(SQL)
// http://en.wikipedia.org/wiki/Cross-site_scripting
// http://en.wikipedia.org/wiki/Cross-site_request_forgery
// http://php.net/manual/en/security.database.sql-injection.php
// http://php.net/manual/en/function.htmlentities.php & +
// http://regexcrossword.com/

