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Drawing hands on a clock face - PHP

Would you like to draw clock face hands on to an image (such as the one shown here, with the time in UK when you called the page up!)? It's easier than you think using PHP's GD module.

Instead of supplying a fixed image in your <img> tag, provide the URL of a PHP script that reads an image and adds the hands - like I've done to the left here. I've even provided the source code - here so you can do something similar if you wish!

This very example is also used on our site clock which generates one image per minute ... and it will be a long time before we have all the images we need without using the PHP "cheat" I've introduced on this page.

(written 2007-05-19)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
G912 - Well House Consultants - Photography for the Web
  [3402] That spec is a kingfisher ... - (2011-08-21)
  [3170] How far is something pictured from the camera? - (2011-02-15)
  [3104] Catering in Syracuse, the Saigon Cafe, stolen images and Christmas - (2010-12-25)
  [2884] Hotlinked images onto adult material sites - (2010-07-23)
  [2592] Re-using our pictures - (2010-01-21)
  [2252] Leaping dog, Leaping horse, copyright of old masters - (2009-06-20)
  [2224] Trowbridge - a missed opportunity? Melksham - into the breach? - (2009-06-08)
  [1895] Comparison - with and without flash - (2008-11-20)
  [1732] Old pictures and comparisons - (2008-08-01)
  [1568] What colour is the season? - (2008-03-08)
  [1506] Ongoing Image Copyright Issues, PHP and MySQL solutions - (2008-01-14)
  [1396] Using PHP to upload images / Store on MySQL database - security questions - (2007-10-19)
  [1188] What shape is your shake? - (2007-05-15)
  [1185] Themes for the web site - (2007-05-13)
  [1114] PHP Image upload script - (2007-03-21)
  [1087] Telling a story in different ways - (2007-02-20)
  [937] Display an image from a MySQL database in a web page via PHP - (2006-11-22)
  [819] My projector has a photo-id - (2006-07-31)
  [665] PHP Image viewing application - (2006-04-01)
  [563] Merging pictures using PHP and GD - (2006-01-13)
  [553] Keep that image small - (2006-01-03)
  [546] The relevance of the hairy woodpecker - (2005-12-28)
  [194] Published Photographer - (2005-01-30)
  [97] What makes a professional photographer? - (2004-10-23)

H115 - Designing PHP-Based Solutions: Best Practice
  [4691] Real life PHP application using our course training MVC example - (2016-06-05)
  [4641] Using an MVC structure - even without a formal framework - (2016-02-07)
  [4326] Learning to program - comments, documentation and test code - (2014-11-22)
  [4118] We not only teach PHP and Python - we teach good PHP and Python Practice! - (2013-06-18)
  [4069] Even early on, separate out your program from your HTML! - (2013-04-25)
  [3926] Filtering PHP form inputs - three ways, but which should you use? - (2012-11-18)
  [3820] PHP sessions - a best practice teaching example - (2012-07-27)
  [3813] Injection Attacks - PHP, SQL, HTML, Javascript - and how to neutralise them - (2012-07-22)
  [3539] Separating program and artwork in PHP - easier maintainance, and better for the user - (2011-12-05)
  [2679] How to build a test harness into your PHP - (2010-03-16)
  [2430] Not just a PHP program - a good web application - (2009-09-29)
  [2221] Adding a newsfeed for your users to a multipage PHP application - (2009-06-06)
  [2199] Improving the structure of your early PHP programs - (2009-05-25)
  [1794] Refactoring - a PHP demo becomes a production page - (2008-09-12)
  [1694] Defensive coding techniques in PHP? - (2008-07-02)
  [1623] PHP Techniques - a workshop - (2008-04-26)
  [1533] Short and sweet and sticky - PHP form input - (2008-02-06)
  [1490] Software to record day to day events and keep an action list - (2007-12-31)
  [1487] Efficient PHP applications - framework and example - (2007-12-28)
  [1482] A story about benchmarking PHP - (2007-12-23)
  [1391] Ordnance Survey Grid Reference to Latitude / Longitude - (2007-10-14)
  [1390] Converting from postal address to latitude / longitude - (2007-10-13)
  [1389] Controlling and labelling Google maps via PHP - (2007-10-13)
  [1381] Using a MySQL database to control mod_rewrite via PHP - (2007-10-06)
  [1323] Easy handling of errors in PHP - (2007-08-27)
  [1321] Resetting session based tests in PHP - (2007-08-26)
  [1182] Painting a masterpiece in PHP - (2007-05-10)
  [1181] Good Programming practise - where to initialise variables - (2007-05-09)
  [1166] Back button - ensuring order are not submitted twice (PHP) - (2007-04-28)
  [1052] Learning to write secure, maintainable PHP - (2007-01-25)
  [1047] Maintainable code - some positive advice - (2007-01-21)
  [945] Code quality counts - (2006-11-26)
  [936] Global, Superglobal, Session variables - scope and persistance in PHP - (2006-11-21)
  [896] PHP - good coding practise and sticky radio buttons - (2006-10-17)
  [839] Reporting on the 10 largest files or 10 top scores - (2006-08-20)
  [572] Giving the researcher power over database analysis - (2006-01-22)
  [426] Robust checking of data entered by users - (2005-08-27)
  [394] A year on - should we offer certified PHP courses - (2005-07-28)
  [340] Code and code maintainance efficiency - (2005-06-08)
  [261] Putting a form online - (2005-03-29)
  [237] Crossfertilisation, PHP to Python - (2005-03-06)
  [123] Short underground journeys and a PHP book - (2004-11-19)

H309 - PHP - Maps, Graphics and Geographics
  [4655] Image indexer / thumbnail display scripts in PHP - (2016-02-25)
  [4437] Adding a PHP build option, rotating an image based on camera data, and a new look at thumbnails in PHP - (2015-02-22)
  [4365] The changing face of Christmas - (2014-12-26)
  [4178] Where are you? How to write a geosensitive application - (2013-09-18)
  [3817] Fpdf - generating .pdf documents easily from your PHP program - (2012-07-24)
  [3734] QR codes with marketing logos embedded - (2012-05-16)
  [3584] QR codes - graphics images that provide quick phone links - (2012-01-18)
  [3536] UK Mapping Data - and more to come - under government Open Data measures - (2011-12-03)
  [3447] Needle in a haystack - finding the web server overload - (2011-09-18)
  [3211] Computer Graphics in PHP - World (incoming data) to Pixel (screen) conversion - (2011-03-24)
  [3197] Finding and diverting image requests from rogue domains - (2011-03-08)
  [3133] An image from a website that occasionally comes out as hyroglyphics - (2011-01-14)
  [3027] Server logs - drawing a graph of gathered data - (2010-11-03)
  [2939] Protecting your images from use out of context - (2010-08-29)
  [2729] Uploading a document or image to its own URL via a browser - (2010-04-18)
  [2675] Redirecting to your main domain for correct security keys - (2010-03-13)
  [2583] Reducing image size on digital photos - PHP - (2010-01-17)
  [2390] Dynamic / changing images on your web page - (2009-09-01)
  [2361] Geocoding - converting address to latitude / Longitude with PHP via Google - (2009-08-14)
  [2343] World Flags in your PHP pages - (2009-08-10)
  [1956] Images for Christmas - (2008-12-21)
  [1923] Making it all worthwhile - (2008-12-04)
  [1756] Ever had One of THOSE mornings? - (2008-08-16)
  [1752] Dynamic maps / geographics in PHP - (2008-08-13)
  [1734] All around the world? - (2008-08-03)
  [1724] addslashes v mysql_real_escape_string in PHP - (2008-07-27)
  [1628] Gant charts - drawing them with a PHP script - (2008-05-03)
  [1104] Drawing dynamic graphs in PHP - (2007-03-09)
  [320] Ordnance Survey - using a 'Get a map' - (2005-05-22)

H999 - Additional PHP Material
  [3210] Catchable fatal error in PHP ... How to catch, and alternative solutions such as JSON - (2011-03-22)
  [3118] Arrays of arrays - or 2D arrays. How to program tables. - (2011-01-02)
  [2684] Exception handling in PHP - (2010-03-18)
  [2215] If nothing, make it nothing. - (2009-06-02)
  [2073] Extra PHP Examples - (2009-03-09)
  [1519] Flipping images on your web page - (2008-01-26)
  [1505] Script to present commonly used images - PHP - (2008-01-13)
  [1485] Copyright and theft of images, bandwidth and members. - (2007-12-26)
  [1451] More PHP sample and demonstration programs - (2007-12-01)
  [1270] PHP Standalone - keyboard to screen - (2007-07-18)
  [1053] Sorting people by name in PHP - (2007-01-26)
  [1020] Parallel processing in PHP - (2007-01-03)
  [1010] Dates, times, clickable diarys in PHP - (2006-12-28)
  [917] Syntax checking in PHP - (2006-11-07)
  [822] PHP - a team member leaves - (2006-08-04)
  [806] Check your user is human. Have him retype a word in a graphic - (2006-07-17)
  [789] Hot answers in PHP - (2006-07-02)
  [687] Presentation, Business and Persistence layers in Perl and PHP - (2006-04-17)
  [603] PHP - setting sort order with an associative array - (2006-02-13)
  [493] Running a Perl script within a PHP page - (2005-11-12)
  [483] Double Dollars in PHP - (2005-11-02)
  [468] Stand alone PHP programs - (2005-10-18)
  [372] Time calculation in PHP - (2005-07-08)
  [337] the array returned by preg_match_all - (2005-06-06)
  [322] More maps - (2005-05-23)
  [239] What and why for the epoch - (2005-03-08)
  [54] PHP and natural sorting - (2004-09-19)


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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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