Home
>
Web Development
>
PIM Team Case Study: Creating Text Effects With PHP and GD

PIM Team Case Study: Creating Text Effects With PHP and GD

See how you can create graphic effects on text with PHP and GD - drop shadows, arcs, fonts and colors.

Problem

A-tec Signs and Sraphics Inc. launched a web site with the idea to sell decals online. To achieve better customers ineterest the website had to integrate online decal builder. The company is offering also decals for vehicles which brought some specific requirements to the builder like having the decal text turning arround 4 types of arcs.

Goals

Provide users with preview area
Allow visitors to choose font and color
Allow adding drop shadow and selecting drop shadow color
Allow turning the text into arcs
Real Time calculating

Solution

Because of the need for increasing customers interest we had to think about not for perfect math formulas when showing the graphs in the preview area, but for the people who will look at them.

As we will reaveal below, there were few problems going arround human appreceptions for something 'perfectly smooth' and the matchematical perfect figures.

Methodology

We were going to extensively use PHP GD library for the text effects. It provided easy changing of fonts and colors, adding drop shawdows and rotating the texts.

We had also to create color palletes which to appear when user click and disappear when color is selected (You can personally try the decals creating here). Using hidden layers and javascript was supposed to do the work.

The main problem in this site was to create 4 types of arcs so when the user selects one of them the text is created arround imaginary arc (like in the vector graphical softwares). We were going to study Bezie's formulas and create these arcs with its help.

Implementation

PIM Team Bulgaria had the task to build the full functional online decals builder with the following features:

- Decal background

Some users were supposed to have their decals placed on colored background. We had to allow the preview area to be painted in a selected background. First we created the image in temp folder:

// the name of destination image

$dest='decals/'.time().'.jpg';

//the background

imagefilledrectangle ( $im, 0, 0, 590, 60, $colors[$_POST['bcolors']]);

$colors array contains the available color which are stored by the administrator in the database.

Thus, when the visitor selects a background it is passed as parametter to imagefilledrectangle function.

- Font selection

Users should be able to select fonts for their future decals. Knowing that we can't consider all the fonts will be available on all visitor's computers we had to upload them on the web server directory.

We allowed the admin to manage the fonts, adding their names and uploading files in admin area.

The fonts in the select box came from the database. Selected font was passed in the call to imagettftext funtion which is drawing on the previously created image.

- Color Selections

The color selections had to be a palettes which appear when user clicks and disappear when color is selected. The palette had to look as a table with colors and these colors are also defined in the

admin area so they had to come dynamicly. We had to seed a static javascript function with dynamic content.

We created a PHP cycle which was taking the colors from the database and then creating a string for HTML table. This table is then passed to a javascript function which creates the palletes with the help of hidden layers:

function showTable(table)

{

mouseX = window.event.x + document.body.scrollLeft+25;

if(table=='background')

{

var content="";

var y=460;

}

if(table=='fonts')

{

var content="";

var y=690;

}

if(table=='shadows')

{

var content="";

var y=810;

}

document.getElementById('tabler').style.pixelLeft=mouseX;

document.getEle mentById('tabler').style.pixelTop=y;

document.getElementById('tabler').style.visibility='visib le';

document.getElementById('tabler').innerHTML=content;

}

Of course, once the user select the desired color we had to hide the pallette:

function setColor(elid,color,fromid,shc)

{

document.getElementById(elid).value=color;

docum ent.getElementById('tabler').style.visibility='hidden';

}

Thus we created nice palettes which appear and disappear on a single click and don't take much space on the screen.

- Drop Shawdows

The decals offered has the ability to have a drop shadow added so we had to add this option to the online builder. PHP however didn't offered a nice function for that. We created a procedure which draws the texts twice - once the original 100% saturated text and once the shadow with a percentage of the color and appropriate displacement. Of course the shadow was drawn on the image before the main text.

@imagettftext($img, 20, $gr[$i], $x+$dx, $ys[$i]+$dy, $scolors[$shadowcolor], "fonts/".$_POST['fonts'],$word[$i]);

- Arcs

The main problem came when we had to 'rotate' the texts thru arcs. First we created perfect Bezie funtion which to draw the curves and adjust the letter above them. But what a surprise - the curves looked perfect alone, but when we adjusted the letters above them they seemed rough.

After studying this problem we realised that the rough screen resolution and the disability to antialise the images wouldn't allow us to create nice arcs. We were standing against insoluble problem.

We decided to create few arcs with a graphical software (CorelDraw) and to see what could be wrong.

We noticed that Corel's curves were looking great after they are manually adjusted. However you can't just leave the program to create perfect curves automaticly. A human eye was needed to judge when a curve looks right and when not.

We got a totally different direction. There wasn't an universal function to help us. The solution we found was to 'manually' adjust each letter. We created a procedure with cases which were adjusting each letter on the appropriate place and with appropriate rotation depending on how long was the text. It worked!

We created 2 arrays for each arc type - one array with the positions and one array with the rotations.

The rest was simple:

if($arctype)

{

$start=(35-$l)/2;

if($start%2) $start+=1;

$gr=array_slice($gr,$start,$l);

$ys=array_slice($ys,$start,$l);

}

if(!$arctype)

{

$ys=array();

$gr=array();

//making the arrays

for($i=0;$i

You can go on the atec's site and try the arcs we achieved (http://atecsigns.com/decal/step_1.php).

Results

Now A-tec Sings's web builder creates perfect decals with graphs, calculates the price and allows you to add the decals to your shopping cart and chgeckout (the shopping cart software is also created by PIM Team Bulgaria).

The builder allows the visitor to create the desired decals with any color, dropped shadow, background and shape, to preview it and to calculate the cost for different sizes and quantities.

The website and builder were promoted with massive radio advertising company. At that time it was the only decal builder which allowed creating texts arround arcs.

Conclusions

Use GD to create text effects
Do not forget that you can create you own functions for what GD does not offer
Do not always search for math perfect formulas. The graphical effects are intended to the human eye
Load fonts in the server
Use javascript and hidden layers to achieve great flexibility

About The Author

Bobby Handzhiev is a senior developer in PIM Team Bulgaria

http://atecsigns.com/decal/step_1.php

scheduled maid service Glencoe ...

In The News:

A fake Claude AI download scam uses Google ads and Bing redirects to trick Mac users into pasting a hidden malicious command in their Terminal.

Ahold Delhaize's cybersecurity incident knocked online ordering and digital coupons offline at Stop & Shop, Food Lion, Hannaford and Giant Food stores.

The Fox News AI Newsletter covers the latest artificial intelligence technology advancements, including the challenges and opportunities AI presents now and for the future.

Amazon's About You feature includes personality details from your shopping history, and some shoppers are finding hilariously awkward results.

Identity theft recovery starts with securing bank accounts, freezing credit and enabling two-factor authentication within the first 24 hours.

Apple's $299 HomeView smart display uses facial recognition to personalize screens for up to six household members and show live security camera feeds.

Domonique DuBose spotted red flags when a man on Hinge with 85,000 followers and a blue checkmark claimed to be a San Francisco 49ers player.

Your phone's location data can expose visits to doctors, pharmacies and places of worship. The FTC took action against data brokers selling this data.

Hackers targeted Danfoss refrigerator controls across French supermarkets, forcing chains like Carrefour and Monoprix to discard massive food stocks.

iOS 27 finally lets iPhone Shared Albums store photos and videos at full resolution in iCloud, but new items count toward the owner's storage.

A fake Facebook Marketplace text scam uses your real name as the seller to trick you into replying, and Malwarebytes warns even one response helps.

The Pentagon data breach exposed 2.76 million Social Security numbers and military records, raising long-term identity theft concerns for veterans.

Kodiak AI plans to haul IKEA freight on Texas highways with no one in the cab, raising urgent cybersecurity and safety questions for drivers.

Apple Intelligence in iOS 27 adds Extend and Reframe tools to Photos, letting iPhones generate new background areas beyond your original borders.

Microsoft's X account was hijacked to promote a crypto pump-and-dump scheme, exposing its more than 13 million followers to a scam campaign.

Scammers can combine your name, phone number and address with data breach details to attempt SIM swaps, phishing and even identity theft schemes.

ChatGPT Work, Meta Muse and Gemini Spark can monitor flight prices, sort your email inbox and track important deadlines, but savvy users start small.

iPhone, Samsung Galaxy and Google Pixel each hide a built-in tool that turns a video frame into a separate photo without any screenshot needed.

Operation KillSwitch dismantled KillSec's ransomware infrastructure, but investigators say a 16-year-old allegedly ran the entire cybercrime operation.

The Fox News Artificial Intelligence newsletter covers where voters will decide on AI data center ballot measures and Jeff Bezos' tech vision.

Apple's Impersonation Risk Detection in iOS 27 can flag suspicious activity inside apps, but the setting is off by default and must be enabled.

Federal Election Commission records can expose your name, address, employer and donation history once contributions exceed the $200 threshold.

Cybersecurity expert Morgan Wright says human skepticism remains the strongest defense against AI-driven phishing scams and voice cloning fraud schemes.

iPhone, Google Pixel and Samsung Galaxy each handle security updates differently, and one screen saying "up to date" may not tell the whole story.

Deborah Del Mastro heard what sounded like her daughter's terrified voice on the phone, launching a five-hour virtual kidnapping scam ordeal.

PIM Team Case Study: Creating Text Effects With PHP and GD

Web Development