<\/span><\/h2>\nFor this tutorial, we’ll first generate a blank PNG image dynamically, and add some text to that. The same techniques can also be applied to existing images however. The code we’re using and the output is below, and below that is an explanation of what the code does.<\/p>\n
<?php\r\n\/\/ create an image with width 100px, height 20px\r\n$image = imagecreate(100, 20);\r\n \r\n\/\/ create a red colour for the background\r\n\/\/ as it is the first call to imagecolorallocate(), this fills the background automatically\r\n$red_background = imagecolorallocate($image, 255, 0, 0);\r\n\/\/ create a black colour for writing on the image\r\n$black = imagecolorallocate($image, 0, 0, 0);\r\n \r\n\/\/ write the string \"tiposaurus\" on the image\r\n\/\/ the top left of the text is at the position (10, 2)\r\nimagestring($image, 4, 10, 2, 'tiposaurus', $black);\r\n \r\n\/\/ output the image\r\n\/\/ tell the browser what we\u2019re sending it\r\nHeader('Content-type: image\/png');\r\n\/\/ output the image as a png\r\nimagepng($image);\r\n \r\n\/\/ tidy up\r\nimagedestroy($image);\r\n?><\/pre>\n