Functions JScms
Function: JScms_isIPBlocked
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Function: JScms_isIPBlocked
The JScms_isIPBlocked function checks if a given IP address is within a blocked range or matches a specific blocked IP.
It supports IPv4 and IPv6 addresses and utilizes network masks for range-based blocking.
Syntax
JScms_isIPBlocked($ip, $blockedIPs)
Parameters
$ip: (string) The IP address to check.$blockedIPs: (array) A list of blocked IPs or ranges (e.g.,["192.168.1.0:255.255.255.0"]).
Returns
(bool) Returns true if the IP address is blocked, or false otherwise.
Example Usage
<?php
$ip = "192.168.1.10";
$blockedIPs = ["192.168.1.0:255.255.255.0", "10.0.0.1"];
$isBlocked = JScms_isIPBlocked($ip, $blockedIPs);
if ($isBlocked) {
echo "IP is blocked.";
} else {
echo "IP is not blocked.";
}
?>
Best Practices
- Store blocked IPs and ranges securely and validate them periodically.
- Use this function to implement security measures such as rate limiting or banning suspicious IPs.
- Regularly test the function with a variety of IP formats to ensure proper handling.
Common Issues
- Improper Range Format: Ensure blocked ranges are specified correctly (e.g.,
192.168.1.0:255.255.255.0). - IPv6 Compatibility: Verify that all IPv6 addresses are handled properly in your environment.