gdPngGetVersionString 1323 ext/gd/gd.c    	php_info_print_table_row(2, "libPNG Version", gdPngGetVersionString());
gdPngGetVersionString    6 ext/gd/gd_compat.h const char * gdPngGetVersionString();
gdPngGetVersionString  376 ext/gd/libgd/gd.h const char * gdPngGetVersionString();