There is also an imagepolygon($image, $points, $num_points, $color) function, which can create a polygon with any number of sides or points.
The $x2 and $y2 values determine the bottom-right corner. The $x1 and $y1 values determine the top-left corner of the rectangle. You can draw rectangles over an image using the imagerectangle($image, $x1, $y1, $x2, $y2, $color) function. If you want to draw complete arcs from 0 to 360 degrees, you can use the alternative imageellipse($image, $cx, $cy, $width, $height, $color) function. The $start and $end parameters specify the starting and ending angle of the arc in degrees. The $width and $height parameters determine the size of the arc on different axes. The function imagearc($image, $cx, $cy, $width, $height, $start, $end, $color) can draw circular arcs using $cx and $cy as its center. Similarly, it will draw a vertical line if $x1 is equal to $x2. The function will draw a horizontal line if $y1 is equal to $y2.
We will be using imagecreatetruecolor() throughout this tutorial to create new images from scratch. The $image parameter is an image resource that will have been created earlier using functions like imagecreatetruecolor() or imagecreatefromjpeg(). You can draw a simple straight line between two given points using the imageline($image, $x1, $y1, $x2, $y2, $color) function. We will learn about basic shapes in this section and then cover line thickness, brushes, and line styles later. Controlling Line Thickness, Style, and Color Fills.Here's a preview of what we'll be creating at the end of the post:
#Write text on image app how to
This tutorial will teach you how to draw basic shapes in PHP and how to render text using your favorite font.
There are also functions available to draw text on the rendered image, which opens up a lot of possibilities. With some maths, these shapes can create nice patterns. We can use different functions in the library to draw basic shapes like ellipses, circles, rectangles, polygons, and simple lines. Besides using GD for manipulating regular images, we can also create our own from scratch.
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