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diff --git a/src/Network/IP.php b/src/Network/IP.php
new file mode 100644
--- /dev/null
+++ b/src/Network/IP.php
@@ -0,0 +1,20 @@
+<?php
+declare(strict_types=1);
+
+namespace Keruald\OmniTools\Network;
+
+class IP {
+
+ public static function isIP (string $ip) : bool {
+ return self::isIPv4($ip) || self::isIPv6($ip);
+ }
+
+ public static function isIPv4 (string $ip) : bool {
+ return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) !== false;
+ }
+
+ public static function isIPv6 (string $ip) : bool {
+ return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) !== false;
+ }
+
+}
diff --git a/tests/Network/IPTest.php b/tests/Network/IPTest.php
new file mode 100644
--- /dev/null
+++ b/tests/Network/IPTest.php
@@ -0,0 +1,60 @@
+<?php
+declare(strict_types=1);
+
+namespace Keruald\OmniTools\Tests\Network;
+
+use Keruald\OmniTools\Network\IP;
+use PHPUnit\Framework\TestCase;
+
+class IPTest extends TestCase {
+
+ /**
+ * @covers \Keruald\OmniTools\Network\IP::isIP
+ */
+ function testIsIP () {
+ $this->assertTrue(IP::isIP("0.0.0.0"));
+ $this->assertFalse(IP::isIP(""));
+ $this->assertFalse(IP::isIP("1"));
+ $this->assertFalse(IP::isIP("17.17"));
+ $this->assertTrue(IP::isIP("17.17.17.17"));
+ $this->assertFalse(IP::isIP("17.17.17.256"));
+ $this->assertTrue(IP::isIP("fe80:0000:0000:0000:0204:61ff:fe9d:f156"));
+ }
+
+ /**
+ * @covers \Keruald\OmniTools\Network\IP::isIPv4
+ */
+ function testIsIPv4 () {
+ $this->assertTrue(IP::isIPv4("0.0.0.0"));
+ $this->assertFalse(IP::isIPv4(""));
+ $this->assertFalse(IP::isIPv4("1"));
+ $this->assertFalse(IP::isIPv4("17.17"));
+ $this->assertTrue(IP::isIPv4("17.17.17.17"));
+ $this->assertFalse(IP::isIPv4("17.17.17.256"));
+ $this->assertFalse(IP::isIPv4(""));
+ $this->assertFalse(IP::isIPv4("fe80:0000:0000:0000:0204:61ff:fe9d:f156"));
+ }
+
+ /**
+ * @covers \Keruald\OmniTools\Network\IP::isIPv6
+ */
+ function testIsIPv6 () {
+ $this->assertFalse(IP::isIPv6("0.0.0.0"));
+ $this->assertFalse(IP::isIPv6(""));
+ $this->assertFalse(IP::isIPv6("1"));
+ $this->assertFalse(IP::isIPv6("17.17"));
+ $this->assertFalse(IP::isIPv6("17.17.17.17"));
+ $this->assertTrue(IP::isIPv6("::1"));
+ $this->assertFalse(IP::isIPv6("::fg"));
+ $this->assertTrue(IP::isIPv6("::1"));
+
+ // Advanced IPv6 tests curated by Stephen Ryan
+ // Source: http://forums.dartware.com/viewtopic.php?t=452
+ $this->assertTrue(IP::isIPv6("fe80:0000:0000:0000:0204:61ff:fe9d:f156"));
+ $this->assertFalse(IP::isIPv6("02001:0000:1234:0000:0000:C1C0:ABCD:0876"), "extra 0 not allowed");
+ $this->assertFalse(IP::isIPv6("2001:0000:1234:0000:00001:C1C0:ABCD:0876"), "extra 0 not allowed");
+ $this->assertFalse(IP::isIPv6("1.2.3.4:1111:2222:3333:4444::5555"));
+ $this->assertTrue(IP::isIPv6("::ffff:192.0.2.128"), "can't validate IPv4 represented as dotted-quads");
+ }
+
+}

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