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<?php /* * ip_in_range.php - Function to determine if an IP is located in a * specific range as specified via several alternative * formats. * * Network ranges can be specified as: * 1. Wildcard format: 1.2.3.* * 2. CIDR format: 1.2.3/24 OR 1.2.3.4/255.255.255.0 * 3. Start-End IP format: 1.2.3.0-1.2.3.255 * * Return value BOOLEAN : ip_in_range($ip, $range); * * Copyright 2008: Paul Gregg <pgregg@pgregg.com> * 10 January 2008 * Version: 1.2 * * Source website: http://www.pgregg.com/projects/php/ip_in_range/ * Version 1.2 * * This software is Donationware - if you feel you have benefited from * the use of this tool then please consider a donation. The value of * which is entirely left up to your discretion. * http://www.pgregg.com/donate/ * * Please do not remove this header, or source attibution from this file. */ /* * Modified by James Greene <james@cloudflare.com> to include IPV6 support * (original version only supported IPV4). * 21 May 2012 */ // decbin32 // In order to simplify working with IP addresses (in binary) and their // netmasks, it is easier to ensure that the binary strings are padded // with zeros out to 32 characters - IP addresses are 32 bit numbers function decbin32 ($dec) { return str_pad(decbin($dec), 32, '0', STR_PAD_LEFT); } // ipv4_in_range // This function takes 2 arguments, an IP address and a "range" in several // different formats. // Network ranges can be specified as: // 1. Wildcard format: 1.2.3.* // 2. CIDR format: 1.2.3/24 OR 1.2.3.4/255.255.255.0 // 3. Start-End IP format: 1.2.3.0-1.2.3.255 // The function will return true if the supplied IP is within the range. // Note little validation is done on the range inputs - it expects you to // use one of the above 3 formats. function ipv4_in_range($ip, $range) { if (strpos($range, '/') !== false) { // $range is in IP/NETMASK format list($range, $netmask) = explode('/', $range, 2); if (strpos($netmask, '.') !== false) { // $netmask is a 255.255.0.0 format $netmask = str_replace('*', '0', $netmask); $netmask_dec = ip2long($netmask); return ( (ip2long($ip) & $netmask_dec) == (ip2long($range) & $netmask_dec) ); } else { // $netmask is a CIDR size block // fix the range argument $x = explode('.', $range); while(count($x)<4) $x[] = '0'; list($a,$b,$c,$d) = $x; $range = sprintf("%u.%u.%u.%u", empty($a)?'0':$a, empty($b)?'0':$b,empty($c)?'0':$c,empty($d)?'0':$d); $range_dec = ip2long($range); $ip_dec = ip2long($ip); # Strategy 1 - Create the netmask with 'netmask' 1s and then fill it to 32 with 0s #$netmask_dec = bindec(str_pad('', $netmask, '1') . str_pad('', 32-$netmask, '0')); # Strategy 2 - Use math to create it $wildcard_dec = pow(2, (32-$netmask)) - 1; $netmask_dec = ~ $wildcard_dec; return (($ip_dec & $netmask_dec) == ($range_dec & $netmask_dec)); } } else { // range might be 255.255.*.* or 1.2.3.0-1.2.3.255 if (strpos($range, '*') !==false) { // a.b.*.* format // Just convert to A-B format by setting * to 0 for A and 255 for B $lower = str_replace('*', '0', $range); $upper = str_replace('*', '255', $range); $range = "$lower-$upper"; } if (strpos($range, '-')!==false) { // A-B format list($lower, $upper) = explode('-', $range, 2); $lower_dec = (float)sprintf("%u",ip2long($lower)); $upper_dec = (float)sprintf("%u",ip2long($upper)); $ip_dec = (float)sprintf("%u",ip2long($ip)); return ( ($ip_dec>=$lower_dec) && ($ip_dec<=$upper_dec) ); } return false; } } function ip2long6($ip) { if (substr_count($ip, '::')) { $ip = str_replace('::', str_repeat(':0000', 8 - substr_count($ip, ':')) . ':', $ip); } $ip = explode(':', $ip); $r_ip = ''; foreach ($ip as $v) { $r_ip .= str_pad(base_convert($v, 16, 2), 16, 0, STR_PAD_LEFT); } return base_convert($r_ip, 2, 10); } // Get the ipv6 full format and return it as a decimal value. function get_ipv6_full($ip) { $pieces = explode ("/", $ip, 2); $left_piece = $pieces[0]; $right_piece = $pieces[1]; // Extract out the main IP pieces $ip_pieces = explode("::", $left_piece, 2); $main_ip_piece = $ip_pieces[0]; $last_ip_piece = $ip_pieces[1]; // Pad out the shorthand entries. $main_ip_pieces = explode(":", $main_ip_piece); foreach($main_ip_pieces as $key=>$val) { $main_ip_pieces[$key] = str_pad($main_ip_pieces[$key], 4, "0", STR_PAD_LEFT); } // Check to see if the last IP block (part after ::) is set $last_piece = ""; $size = count($main_ip_pieces); if (trim($last_ip_piece) != "") { $last_piece = str_pad($last_ip_piece, 4, "0", STR_PAD_LEFT); // Build the full form of the IPV6 address considering the last IP block set for ($i = $size; $i < 7; $i++) { $main_ip_pieces[$i] = "0000"; } $main_ip_pieces[7] = $last_piece; } else { // Build the full form of the IPV6 address for ($i = $size; $i < 8; $i++) { $main_ip_pieces[$i] = "0000"; } } // Rebuild the final long form IPV6 address $final_ip = implode(":", $main_ip_pieces); return ip2long6($final_ip); } // Determine whether the IPV6 address is within range. // $ip is the IPV6 address in decimal format to check if its within the IP range created by the cloudflare IPV6 address, $range_ip. // $ip and $range_ip are converted to full IPV6 format. // Returns true if the IPV6 address, $ip, is within the range from $range_ip. False otherwise. function ipv6_in_range($ip, $range_ip) { $pieces = explode ("/", $range_ip, 2); $left_piece = $pieces[0]; $right_piece = $pieces[1]; // Extract out the main IP pieces $ip_pieces = explode("::", $left_piece, 2); $main_ip_piece = $ip_pieces[0]; $last_ip_piece = $ip_pieces[1]; // Pad out the shorthand entries. $main_ip_pieces = explode(":", $main_ip_piece); foreach($main_ip_pieces as $key=>$val) { $main_ip_pieces[$key] = str_pad($main_ip_pieces[$key], 4, "0", STR_PAD_LEFT); } // Create the first and last pieces that will denote the IPV6 range. $first = $main_ip_pieces; $last = $main_ip_pieces; // Check to see if the last IP block (part after ::) is set $last_piece = ""; $size = count($main_ip_pieces); if (trim($last_ip_piece) != "") { $last_piece = str_pad($last_ip_piece, 4, "0", STR_PAD_LEFT); // Build the full form of the IPV6 address considering the last IP block set for ($i = $size; $i < 7; $i++) { $first[$i] = "0000"; $last[$i] = "ffff"; } $main_ip_pieces[7] = $last_piece; } else { // Build the full form of the IPV6 address for ($i = $size; $i < 8; $i++) { $first[$i] = "0000"; $last[$i] = "ffff"; } } // Rebuild the final long form IPV6 address $first = ip2long6(implode(":", $first)); $last = ip2long6(implode(":", $last)); $in_range = ($ip >= $first && $ip <= $last); return $in_range; } function ip_range_type($range_ip) { if (strpos($range_ip, ':') !== false) { //if ip range provided is ipv6 then //echo "range provided is ipv6"; return 1; } else { //if ip range provided is ipv4 then //echo "range provided is ipv4"; return 2; } } function ip_in_range($ip, $range_ip) { //only check IPv4 addresses against IPv4 ranges if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) && ip_range_type($range_ip) == 2) { return ipv4_in_range($ip, $range_ip); } //only check IPv6 addresses against IPv6 ranges if(filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) && ip_range_type($range_ip) == 1) { return ipv6_in_range($ip, $range_ip); } } $ip = "173.224.116.233"; $range_ip = /*"173.224.117.0/24";*/"173.224.112.0/20"; $ip = "2a02:c7f:9e03:1d00:59c2:3083:c23b:7146"; $range_ip = "2a02:c78::/29"; echo "Is IP in range : " . ip_in_range($ip, $range_ip); //echo ip_range_type($range_ip);

Version	System time (s)	User time (s)	Memory (MiB)
8.5.2	0.010	0.008	19.46
8.5.1	0.009	0.008	16.79
8.5.0	0.010	0.011	20.02
8.4.17	0.008	0.014	24.06
8.4.16	0.014	0.009	20.64
8.4.15	0.002	0.000	14.05
8.4.14	0.012	0.012	17.68
8.4.13	0.007	0.003	17.64
8.4.12	0.014	0.006	21.00
8.4.11	0.011	0.011	22.53
8.4.10	0.013	0.009	17.84
8.4.9	0.009	0.006	18.97
8.4.8	0.013	0.007	17.87
8.4.7	0.013	0.008	18.00
8.4.6	0.011	0.011	18.75
8.4.5	0.011	0.011	19.73
8.4.4	0.008	0.003	17.79
8.4.3	0.010	0.010	17.67
8.4.2	0.010	0.010	19.39
8.4.1	0.007	0.013	19.57
8.3.30	0.009	0.012	20.93
8.3.29	0.009	0.011	20.93
8.3.28	0.013	0.009	18.45
8.3.27	0.014	0.007	17.13
8.3.26	0.009	0.009	16.70
8.3.25	0.012	0.008	19.30
8.3.24	0.013	0.007	16.80
8.3.23	0.009	0.007	16.84
8.3.22	0.007	0.011	17.66
8.3.21	0.012	0.008	16.78
8.3.20	0.005	0.004	16.79
8.3.19	0.004	0.005	17.12
8.3.18	0.010	0.009	16.86
8.3.17	0.012	0.006	20.59
8.3.16	0.009	0.003	17.03
8.3.15	0.003	0.015	19.09
8.3.14	0.006	0.012	16.98
8.3.13	0.004	0.004	18.75
8.3.12	0.006	0.003	19.09
8.3.11	0.009	0.000	20.94
8.3.10	0.006	0.013	24.06
8.3.9	0.006	0.009	26.77
8.3.8	0.006	0.003	16.75
8.3.7	0.013	0.003	16.75
8.3.6	0.012	0.003	16.75
8.3.5	0.015	0.002	17.72
8.3.4	0.009	0.006	19.09
8.3.3	0.006	0.009	18.84
8.3.2	0.004	0.004	20.59
8.3.1	0.004	0.004	23.73
8.3.0	0.000	0.008	23.78
8.2.30	0.010	0.007	22.19
8.2.29	0.013	0.006	20.45
8.2.28	0.003	0.007	18.39
8.2.27	0.016	0.003	17.29
8.2.26	0.015	0.003	18.72
8.2.25	0.003	0.005	16.90
8.2.24	0.009	0.006	19.12
8.2.23	0.004	0.004	22.58
8.2.22	0.004	0.004	37.54
8.2.21	0.011	0.007	26.77
8.2.20	0.009	0.000	16.63
8.2.19	0.016	0.003	16.88
8.2.18	0.007	0.007	18.54
8.2.17	0.006	0.012	19.34
8.2.16	0.015	0.000	22.96
8.2.15	0.005	0.003	25.66
8.2.14	0.005	0.003	24.66
8.2.13	0.000	0.008	22.55
8.2.12	0.005	0.003	26.35
8.2.11	0.000	0.009	20.73
8.2.10	0.007	0.004	18.16
8.2.9	0.003	0.006	18.00
8.2.8	0.003	0.006	19.17
8.2.7	0.005	0.005	17.88
8.2.6	0.004	0.004	18.00
8.2.5	0.004	0.004	18.03
8.2.4	0.010	0.000	19.60
8.2.3	0.000	0.008	19.50
8.2.2	0.000	0.010	18.45
8.2.1	0.008	0.000	18.37
8.2.0	0.000	0.008	18.26
8.1.34	0.013	0.007	21.72
8.1.33	0.013	0.007	21.87
8.1.32	0.016	0.005	16.38
8.1.31	0.004	0.014	18.47
8.1.30	0.011	0.000	16.50
8.1.29	0.003	0.006	18.88
8.1.28	0.013	0.007	25.92
8.1.27	0.008	0.000	22.30
8.1.26	0.000	0.008	26.35
8.1.25	0.006	0.003	28.09
8.1.24	0.003	0.006	22.22
8.1.23	0.004	0.008	18.08
8.1.22	0.000	0.008	18.16
8.1.21	0.000	0.008	18.77
8.1.20	0.000	0.010	17.72
8.1.19	0.003	0.007	17.60
8.1.18	0.003	0.007	18.10
8.1.17	0.000	0.008	17.75
8.1.16	0.007	0.004	19.25
8.1.15	0.000	0.009	19.14
8.1.14	0.005	0.002	17.93
8.1.13	0.003	0.006	19.13
8.1.12	0.000	0.008	17.58
8.1.11	0.004	0.004	17.74
8.1.10	0.004	0.004	17.75
8.1.9	0.007	0.000	17.75
8.1.8	0.006	0.003	17.75
8.1.7	0.007	0.000	17.73
8.1.6	0.004	0.004	17.88
8.1.5	0.005	0.003	17.81
8.1.4	0.014	0.004	17.65
8.1.3	0.004	0.004	17.80
8.1.2	0.008	0.000	17.89
8.1.1	0.000	0.008	17.84
8.1.0	0.007	0.003	17.82
8.0.30	0.004	0.004	19.24
8.0.29	0.008	0.000	16.88
8.0.28	0.003	0.003	18.67
8.0.27	0.004	0.004	16.95
8.0.26	0.000	0.007	20.78
8.0.25	0.008	0.000	17.05
8.0.24	0.000	0.007	17.18
8.0.23	0.007	0.000	17.06
8.0.22	0.004	0.004	17.12
8.0.21	0.007	0.000	17.04
8.0.20	0.008	0.000	17.18
8.0.19	0.004	0.004	17.09
8.0.18	0.000	0.008	17.12
8.0.17	0.000	0.008	17.22
8.0.16	0.007	0.000	17.17
8.0.15	0.005	0.002	16.97
8.0.14	0.005	0.003	17.08
8.0.13	0.000	0.006	13.60
8.0.12	0.005	0.003	17.03
8.0.11	0.007	0.000	17.15
8.0.10	0.000	0.008	17.14
8.0.9	0.004	0.004	17.01
8.0.8	0.014	0.007	17.12
8.0.7	0.000	0.008	17.26
8.0.6	0.000	0.008	17.25
8.0.5	0.000	0.008	17.00
8.0.3	0.011	0.008	17.49
8.0.2	0.010	0.011	17.47
8.0.1	0.003	0.007	17.37
8.0.0	0.007	0.011	17.21
7.4.33	0.000	0.006	16.93
7.4.32	0.000	0.007	16.78
7.4.30	0.007	0.000	16.92
7.4.29	0.008	0.000	16.84
7.4.28	0.000	0.007	16.83
7.4.27	0.008	0.000	16.85
7.4.26	0.006	0.003	16.77
7.4.25	0.004	0.004	16.90
7.4.24	0.000	0.007	16.89
7.4.23	0.004	0.004	16.55
7.4.22	0.013	0.006	16.80
7.4.21	0.010	0.006	16.91
7.4.20	0.000	0.007	16.63
7.4.16	0.007	0.011	16.59
7.4.15	0.009	0.013	17.40
7.4.14	0.011	0.011	17.86
7.4.13	0.007	0.011	16.78
7.4.12	0.009	0.011	16.69
7.4.11	0.014	0.010	16.60
7.4.10	0.000	0.019	16.70
7.4.9	0.004	0.015	16.97
7.4.8	0.016	0.009	19.39
7.4.7	0.006	0.015	16.78
7.4.6	0.009	0.009	16.69
7.4.5	0.009	0.006	16.51
7.4.4	0.007	0.010	16.70
7.4.3	0.011	0.011	16.90
7.4.0	0.009	0.006	15.35
7.3.33	0.000	0.005	13.61
7.3.32	0.006	0.000	13.61
7.3.31	0.000	0.007	16.66
7.3.30	0.000	0.008	16.49
7.3.29	0.006	0.008	16.56
7.3.28	0.007	0.012	16.60
7.3.27	0.006	0.012	17.40
7.3.26	0.008	0.010	16.75
7.3.25	0.015	0.006	16.60
7.3.24	0.012	0.007	16.68
7.3.23	0.003	0.013	16.84
7.3.21	0.003	0.013	16.86
7.3.20	0.007	0.016	16.79
7.3.19	0.016	0.000	16.61
7.3.18	0.013	0.010	16.91
7.3.17	0.003	0.013	16.64
7.3.16	0.008	0.008	16.55
7.2.33	0.006	0.012	17.04
7.2.32	0.006	0.011	16.89
7.2.31	0.008	0.009	16.79
7.2.30	0.003	0.015	17.11
7.2.29	0.008	0.009	17.11
7.2.6	0.010	0.010	17.24
7.1.20	0.003	0.009	15.89
7.1.11	0.007	0.010	18.46
7.1.10	0.007	0.007	18.36
7.1.9	0.010	0.003	18.09
7.1.8	0.011	0.008	18.00
7.1.7	0.007	0.010	17.21
7.1.6	0.025	0.006	35.27
7.1.5	0.010	0.016	34.96
7.1.4	0.019	0.009	34.75
7.1.3	0.016	0.012	34.66
7.1.2	0.013	0.013	34.81
7.1.1	0.005	0.008	16.81
7.1.0	0.000	0.015	16.74
7.0.25	0.004	0.009	17.70
7.0.24	0.003	0.009	17.65
7.0.23	0.003	0.010	17.68
7.0.22	0.000	0.016	17.71
7.0.21	0.007	0.007	16.87
7.0.20	0.007	0.007	16.95
7.0.19	0.006	0.006	17.02
7.0.18	0.003	0.011	16.43
7.0.17	0.008	0.005	16.30
7.0.16	0.007	0.007	16.54
7.0.15	0.008	0.005	16.13
7.0.14	0.008	0.005	16.47
7.0.13	0.003	0.017	16.70
7.0.12	0.003	0.017	16.61
7.0.11	0.004	0.014	16.43
7.0.10	0.007	0.010	16.39
7.0.9	0.000	0.014	16.59
7.0.8	0.003	0.010	16.66
7.0.7	0.009	0.003	16.65
7.0.6	0.009	0.004	16.21
7.0.5	0.000	0.013	16.61
7.0.4	0.009	0.003	16.63
7.0.3	0.005	0.008	16.67
7.0.2	0.000	0.013	16.63
7.0.1	0.000	0.012	16.46
7.0.0	0.003	0.009	16.50