PHP Function Image_Type_To_Extension
In PHP, information can be passed to functions through arguments. Functions are the small programs that perform specific tasks within the larger code of a web page. Each function can have one or more arguments, and the argument must be separated from the function name with a colon. Arguments can be any type of data, but most commonly, they are numbers or strings. Functions are named to be clear and descriptive, so that they are easy to understand.
php function image_type_to_extension is an inbuilt function in PHP that helps in finding the extension for the given image type. This function will return a string with the extension corresponding to the image type. The first parameter of this function is the value of IMAGETYPE_XXX constant. The second argument is a boolean value that decides whether to prepend a dot to the extension or not, defaulting to TRUE.
This function works only if PHP is compiled with the GD library, which allows the dynamic creation and manipulation of various different image formats, such as gif, jpg, png, wbmp, and xpm. You can enable GD support by adding the --with-gd configure switch to your PHP configure line, and you can add additional libraries to support other formats by adding the corresponding configure switches: --with-png=DIR for libpng, --with-jpeg-6b for jpeg, and --with-zlib-dir=DIR for zlib. These additional libraries will also need to be linked to GD at runtime.