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Over the last month or so I've been spending a lot of time working with image manipulation. First I played with resizing with PHP GD, a basic library included in most builds. Then I jumped into the real meat, reading and overwriting the raw EXIF headers, to both clean up some pieces from GD and…
Reading and writing EXIF headers into JPEGs is not something that PHP offers a lot of help with. Outside of one helper function for reading, exif_read_data, which returns a wide variety of meta data about the image (including non-EXIF basic properties of the file), there is no easy way to read or…
Of all the memory-intensive processes that you can do with PHP image resizing is one of the most abused. It may be tempting to have the power of requesting any image in any size, passing the parameters in to a script and boom, having a custom fitted image, but it's not a great idea. There are…