You can use imagecolortransparent instead but this will not be perfect because fonts has anti-aliasing to make their border sweeter. This function does not work with GIF files. php.notes Im using imagegif to display a captcha image to verify human input on a website.
Information (as opposed to single-color transparency) when saving PNG
#Php imagegif full#
Imagesavealpha() sets the flag to attempt to save full alpha channel The path or an open stream resource (which is automatically being closed after this function returns) to save the file to. That is why I believe it to be a GD specific problem with the bundled version. As far as php is concerned the image is being generated correctly. Second problem : there is no transparency. An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(). There are no errors being generated in the logs files. Imagetruecolortopalette($image, true, 256) GIF images), the transparent parts changed to black (no matter what color was actually representing transparent) when I used imagecopy to convert the image to true color.First problem : your characters are ugly: that's because you need to set a palette with less colors when using imagecreatetruecolor. The problem came with palette images with transparency (e.g. Also if a site is vulnerable to a request send via GET everyone of those file system functions can be abused to channel and attack to another host through your server. I came across the problem of having a page where any image could be uploaded, then I would need to work with it as a true color image with transparency. For instance if allowurlfopenOn then a url can be used as a file path, so a call to copy(GETs, GETd) can be used to upload a PHP script anywhere on the system. A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().
#Php imagegif archive#
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