Difference between revisions of "Nn web site building blocks"

• https://wiki.apache.org/httpd/RedirectSSL redirect http to https URLs
  

• GoDaddy let's encrypt ssl apache article 20245, not helpful
  
• LetsEncrypt certbot and GoDaddy servers, cat /proc/version . . .
  
• acme.sh on Github, CA certificate client
  
• acme.sh how to install
  
• acme.sh how to issue a certificate
  

• Install and config
  
• Back-up and restore steps
  
• Troubleshooting
  

• OpenCart installation and config
  
• OpenCart To-Do and Wish List
  

^ Cascading Style Sheets (CSS)

• Learnlayout dot com, flexbox example
  
• CSS flexbox, old versus new syntax at css-tricks.com
  
• Codepen dot io, Chris Coyier example of fixed and fluid block elements
  
• https://www.w3schools.com/tags/canvas_lineto.asp
  
• https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API/Tutorial/Getting_started_with_WebGL
  

- 2018-01-15 MON -

• CSS animations by Github user Chenee

^ 2017-11-27 - Web Page Fonts

• custom web page fonts, Mozilla developers' article
  
• https://www.w3schools.com/charsets/ref_utf_arrows.asp . . . HTML special characters, arrows
• http://www.starr.net/is/type/htmlcodes.html

^ 2017-11-28 - Javascript tutorials, examples and frameworks

Javascript frameworks . . .
• Mithril Javascript framework, simple application
  
• Mochikit framework . . . found 2017-12-07 in translate.google.com page source
  

Javascript tutorials and examples . . .

• CSS-tricks dot com, make entire div clickable
  

These are the first topics on which Ted wants to gather together notes. Hard to remember all details regarding pitfalls encountered, solutions found, and ideas for improving the configuration and use experience of these softwares . . . - TMH

^ PHP Libraries

Programmer James Heinrich has written a PHP library to thumbnail and manipulate image files in other ways. James' PHP library project is available at both GitHub and SourceForge,

• http://phpthumb.sourceforge.net
• https://github.com/JamesHeinrich/phpThumb

To obtain a copy of this project,

   $ git clone https://github.com/JamesHeinrich/phpThumb ./phpThumb

Chosen directory for downloaded instance of phpThumb is outside of web doc root. Will see whether this works . . . running in the 'demo' directory of phpThumb find that PHP's usable memory is set to -1, a seeming default value which likely won't allow phpThumb to work properly. Have per instructions installed ImageMagick utilities as available through Ubuntu 16.04.x LTS package list. The configuration checking script phpThumb/demo/phpThumb.demo.check.php so far reports that no ImageMagick program found.

Also noticed that config checker says phpThumb cache directory present, readable but not writable. Created a /var/cache/phpThumb directory and amended file phpThumb/phpThumb.config.php. Cache directory yet reported 'not writable'. Changed ownership on this directory from root:root to www-data:www-data. Ok now writable . . . and now ImageMagick also found! Hmm, interesting.

Demo files are a little hard to parse at first glance, which hashes of hashes set up to hold multiple demos shown in a single web document. The following phpThumb demo file at SourceForge is also part of our download. This looks like best starting point to get started and running with basic thumb-nailing of images:

   http://phpthumb.sourceforge.net/index.php?source=phpThumb.demo.object.simple.php

About phpThumb file caching, this project file has important info starting at about line 135:

   https://github.com/JamesHeinrich/phpThumb/blob/master/docs/phpthumb.readme.txt

"Note: phpThumb.php is where the caching code is located, if you instantiate your own phpThumb() object that code is bypassed and it's up to you to handle the reading and writing of cached files."

When using single object to process multiple images:

   http://phpthumb.sourceforge.net/index.php?source=phpThumb.demo.object.php

Summary - phpThumb file edits to get simple demo working

We place phpThumb project files in <web_document_root>/lib/phpThumb. Here we edit two files, those named phpthumb.config.php and phpthumb.class.php. In the config file we set phpThumb's high security password to something non-null and long, non-dictionary word string:

  45 $PHPTHUMB_CONFIG['high_security_password']      = '...';

In the class file we amend line 70 to name a relative path to a cache directory for phpThumb:

   70         public $config_cache_directory                      = './cache'; // null;

We still can't make work the phpThumb.demo.demo.php script. We seem unable to make a successful call to the primary script with HTTP 'get' type parameters. This is the script which manages thumbnail caching, the script named phpThumb.php . . .

- 2018-03-06 TUE -

Excerpt from phpThumb.config.php:

222 // * Compatability settings
223 $PHPTHUMB_CONFIG['disable_pathinfo_parsing']        = true;   // if true, $_SERVER[PATH_INFO] is not parsed. May be needed on some     server configurations to allow normal behavior.
224 $PHPTHUMB_CONFIG['disable_imagecopyresampled']      = false;  // if true, imagecopyresampled is replaced with ImageCopyResampleBicu    bic. May be needed for buggy versions of PHP-GD.
225 $PHPTHUMB_CONFIG['disable_onlycreateable_passthru'] = true;   // if true, any image that can be parsed by getimagesize() can be pas    sed through; if false, only images that can be converted to GD by ImageCreateFrom(JPEG|GIF|PNG) functions are allowed
226 $PHPTHUMB_CONFIG['disable_realpath']                = false;  // PHP realpath() function requires that "the running script must hav    e executable permissions on all directories in the hierarchy, otherwise realpath() will return FALSE". Set config_disable_realpath=    false to enable alternate filename-parsing that does not use realpath() function (but also does not resolve symbolic links)
227 
228 

^ Opencart Work

How to show item quantity on the pages where items are shown during shopping:

• https://forum.opencart.com/viewtopic.php?t=154686
• https://forum.opencart.com/viewtopic.php?t=163443

Within Opencart 2p3p0p2 there are at least two scripts named 'product.php'. One of these in ~/opencart-2p3p0p2/catalog/model/catalog/ defines the following public functions, and this file is mentioned in the second reference just above:

$ grep -n function product.php 
3:	public function updateViewed($product_id) {
7:	public function getProduct($product_id) {
59:	public function getProducts($data = array()) {
209:	public function getProductSpecials($data = array()) {
259:	public function getLatestProducts($limit) {
275:	public function getPopularProducts($limit) {
291:	public function getBestSellerProducts($limit) {
309:	public function getProductAttributes($product_id) {
337:	public function getProductOptions($product_id) {
376:	public function getProductDiscounts($product_id) {
382:	public function getProductImages($product_id) {
388:	public function getProductRelated($product_id) {
400:	public function getProductLayoutId($product_id) {
410:	public function getCategories($product_id) {
416:	public function getTotalProducts($data = array()) {
518:	public function getProfile($product_id, $recurring_id) {
524:	public function getProfiles($product_id) {
530:	public function getTotalProductSpecials() {

$

References