Three curly brackets together in php source code
They are vim fold markers, they make it easy to collapse and expand the text inbetween the triple curly braces in vim, in the example shown alternating between:
.../* {{{ proto bool ctype_digit(mixed c) Checks for numeric character(s) */static PHP_FUNCTION(ctype_digit){ CTYPE(isdigit);}/* }}} */...and just
.../* {{{ proto bool ctype_digit(mixed c)...If you look at the end of the file where you find them, you'll often find a block like this:
/* * Local variables: * tab-width: 4 * c-basic-offset: 4 * End: * vim600: sw=4 ts=4 fdm=marker * vim<600: sw=4 ts=4 */Which is another more-obvious indicator that these comments relate to vim.