php-extension-ip2long

PHP_ARG_WITH(robert, for robert support,
[  --with-robert             Include robert support])

PHP_FUNCTION(robert_ip2long);

zend_module_entry robert_module_entry = {
    STANDARD_MODULE_HEADER,
    "robert",
    robert_functions,
    PHP_MINIT(robert),
    PHP_MSHUTDOWN(robert),
    PHP_RINIT(robert),		/* Replace with NULL if there's nothing to do at request start */
    PHP_RSHUTDOWN(robert),	/* Replace with NULL if there's nothing to do at request end */
    PHP_MINFO(robert),
    PHP_ROBERT_VERSION,
    STANDARD_MODULE_PROPERTIES
};

const zend_function_entry robert_functions[] = {
	PHP_FE(confirm_robert_compiled,	NULL)		/* For testing, remove later. */
	PHP_FE(robert_ip2long,NULL) /* for robert_ip2long */
	PHP_FE_END	/* Must be the last line in robert_functions[] */
};

PHP_FUNCTION(robert_ip2long) {

	char *ip = NULL;
	int ip_len;
	unsigned int ip1,ip2,ip3,ip4;
	unsigned long result;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &ip, &ip_len) == FAILURE) {
	    return;
	}
    //	php_printf("input_ip=:%s", ip);
	sscanf(ip, "%d.%d.%d.%d", &ip1, &ip2, &ip3, &ip4);
    //	php_printf("%d.%d.%d.%d", ip1, ip2,ip3,ip4);
    //	result = (((ip1 * 255) + ip2) * 255 + ip3) * 255 + ip4;
	result =  (ip1 << 24) | ( ip2 << 16) | ( ip3 << 8 ) | ip4;
	RETURN_LONG(result);

}

/usr/local/php/bin/phpize
./configure --with-php-config=/usr/local/php/bin/php-config
sudo make && sudo  make install
sudo service php-fpm restart

$ php -m | grep robert
robert

<?php
var_dump(robert_ip2long('127.255.255.255'));
var_dump(robert_ip2long('027.255.255.255'));
var_dump(robert_ip2long('255.255.255.255'));
var_dump(robert_ip2long('0255.255.255.255'));

output:
int(2147483647)
int(469762047)
int(4294967295)
int(4294967295)