gdPngGetVersionString 1324 gd/gd.c        	php_info_print_table_row(2, "libPNG Version", gdPngGetVersionString());
gdPngGetVersionString  257 gd/libgd/gd.h  const char * gdPngGetVersionString();
gdPngGetVersionString   10 gd/libgd/gd_compat.h const char * gdPngGetVersionString();