PHP, CSS & HTML Cheat Sheets

PHP:
http://php.net/manual/en/index.php
http://www.digilife.be/quickreferences/qrc/php%20cheat%20sheet.pdf
http://i.emezeta.com/weblog/emezeta-php-card-v0.2.png
http://www.visibone.com/php/phpskinnysheetback.gif
http://downloads.gosquared.com/help_sheets/08/PHP%20Help%20Sheet%2001.pdf
http://www.dreamincode.net/downloads/ref_sheets/php_reference_sheet.pdf


HTML:
http://downloads.gosquared.com/help_sheets/08/HTML%20Help%20Sheet%2002.pdf
http://www.marrick.com/images/HTML_Els_Atts.gif

CSS:
http://downloads.gosquared.com/help_sheets/08/CSS%20Help%20Sheet%2002.pdf
http://www.smashingmagazine.com/wp-content/uploads/images/css3-cheat-sheet/css3-cheat-sheet.pdf
https://www.visibone.com/html/hscht_840.jpg

Forms:
http://bootsnipp.com/forms?version=3 (For Bootstrap)

Encryption:
https://secure.php.net/openssl_encrypt