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

spotless home service Lake Forest ..

In The News:

A Columbia University breach exposed names, Social Security numbers and academic records of nearly 869,000 people, with notifications beginning in August.

Rental car drivers use AI-powered apps like Proofr to protect themselves from unfair damage fees as major companies deploy automated inspection tools.

Fox News' AI newsletter brings you the latest on technology advancements around artificial intelligence.

OnTrac data breach between April 13-15, 2025, exposed personal information of over 40,000 people including Social Security numbers and medical records.

A woman named Wika announces her engagement to an AI chatbot sparking worldwide debate about virtual relationships and technology.

The notorious people search site National Public Data relaunches despite a previous breach affecting 3 billion individuals, raising fresh privacy concerns.

Revolutionary TRAUMAGEL gel controls life-threatening bleeding from gunshot wounds and traumatic injuries, helping first responders prevent prehospital deaths.

Protect your home network by enabling proper encryption, creating strong passwords, checking connected devices and using VPN and antivirus software.

The Navy's solar-powered Skydweller drone flew nonstop for 73 hours in Mississippi, proving renewable energy can power long-endurance military missions.

Moving and downsizing expose seniors to identity theft and scams as data brokers collect real estate records and personal information to sell to criminals.

ShengShu's Vidar technology revolutionizes humanoid robot training by using AI-generated synthetic video, reducing required training data from hours to just 20 minutes.

Apple's older Mac computers face security risks without regular updates, but 10 essential tips including FileVault encryption and strong passwords can keep aging Macs protected.

Self-driving trucks from PlusAI could reshape freight transportation by 2027, addressing driver shortages and reducing logistics costs for businesses.

Solar farms are turning to sheep instead of mowers to cut grass under solar panels, lowering costs, reducing emissions and creating new income for farmers.

Fraudsters posing as local officials are making fake calls about missed jury duty, demanding payments in a rising scheme that exploits fear of arrest.

Honeywell Aerospace engineers developed a "surface alert system" that gives pilots two aural warnings when they are 15 and 30 seconds away from a collision on the runway.

Anonymous researcher has scraped public Spotify accounts of politicians and celebrities, highlighting major privacy risks in default platform settings.

AI chatbot toys marketed as screen-free playmates could undermine children's empathy and critical thinking skills, according to pediatric specialists.

TransUnion confirms a major data breach affecting 4.4 million U.S. consumers after hackers exploited third-party Salesforce apps to steal personal info.

Scammers use fake DocuSign emails claiming Apple Pay charges to steal personal information using fraudulent phone numbers and fake receipts.

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents now and for the future.

Farmers Insurance confirms data breach affecting over 1.1 million customers nationwide, exposing customer info including addresses.

The iconic Mary Kay pink Cadillac goes electric with the Cadillac Optiq, available only to the company's top 1% of sales force performers.

Cybercriminals abuse trusted Intel driver to gain kernel access and shut down Windows Defender, enabling undetected malware deployment since July 2025.

Using email aliases for online shopping and subscriptions can protect your privacy by preventing companies from linking your activity across websites.

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

Web Development