The imagedestroy() function us used for this purpose.Īnd there we have it, our image is now created, colored and sent to the browser. Three functions are available for this purpose, one for each type of image.Īfterward, we can clear up the memory that is being taken up by storing the image. To complete the code, we can now send our image to the browser.
#PHP IMAGEJPEG IMAGEPNG IMAGEGIF CODE#
If you tried out either of the above examples, you received an error, didn't you? That is because the code was not complete. Compression level: from 0 (no compression) to 9. Note: NULL is invalid if the quality and filters arguments are not used. If not set or NULL, the raw image stream will be outputted directly. The parameters allow integers between 0 and 255, or hexadecimals between 0x00 and 0xFF.Īlternatively, the imagecolorallocate() function is used to specify a color and store it in a variable, while the imagefilltoborder() function is actually used to flood fill the entire image with color. An image resource, returned by one of the image creation functions, such as imagecreatetruecolor (). "Red", "Green" and "Blue" indicate where the values of these color components should be specified. The syntax is: imagecolorallocate(image, red, green, blue) Using the imagecreatetruecolor() function will create a black image (instead of a blank image) with your specified width and height, which you can then see against a white background.Īlternatively, the next step would be to specify the background color of the image, or fill it, using the imagecolorallocate() function.
The syntax is: imagecreate(width, height) Now we can use the imagecreate() function to create a blank image, assign it a width and height, and store it in a variable. This must be specified before any other output is sent to the browser, whether it is blank lines, PHP code, HTML tags, etc. The header() function is used to tell the browser which content type it will be sent. PNG Is Designed As An Alternative to GIF, With the Same Basic Features, But Does Not Support Animation GIF Is Designed to Support Only 256 Colors, Along With Transparency, Interlacing & Animation JPG Is Designed to Compress Full-Color Images, & Is Ideal For Digital Photos, Etc. The three standard type of images that can be created from scratch with the PHP GD Library are: JPG, GIF and PNG. Creating An Image With the PHP GD Library.
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