image_type_to_extension 2713 ext/standard/basic_functions.c 	PHP_FE(image_type_to_extension,											arginfo_image_type_to_extension)
image_type_to_extension 1186 ext/standard/image.c PHP_FUNCTION(image_type_to_extension)
image_type_to_extension   29 ext/standard/php_image.h PHP_FUNCTION(image_type_to_extension);