php_exec          240 ext/standard/exec.c 		ret = php_exec(mode, cmd, NULL, return_value TSRMLS_CC);
php_exec          246 ext/standard/exec.c 		ret = php_exec(2, cmd, ret_array, return_value TSRMLS_CC);
php_exec           40 ext/standard/exec.h PHPAPI int php_exec(int type, char *cmd, zval *array, zval *return_value TSRMLS_DC);