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<?php function isUrl($value) { $alpha = "a-z\x80-\xFF"; $domain = "[0-9$alpha](?:[-0-9$alpha]{0,61}[0-9$alpha])?"; $topDomain = "[$alpha](?:[-0-9$alpha]{0,17}[$alpha])?"; return (bool) preg_match("(^https?://(?:(?:$domain\\.)*$topDomain|\\d{1,3}\.\\d{1,3}\.\\d{1,3}\.\\d{1,3}|\[[0-9a-f:]{3,39}\])(:\\d{1,5})?(/\\S*)?\\z)i", $value); } var_dump($isUrl("https://test.cz")); var_dump($isUrl("http://test.cz")); var_dump($isUrl("https://www.test.cz")); var_dump($isUrl("http://www.test.cz"));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $isUrl in /in/XjoQV on line 11 Fatal error: Uncaught Error: Value of type null is not callable in /in/XjoQV:11 Stack trace: #0 {main} thrown in /in/XjoQV on line 11
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: isUrl in /in/XjoQV on line 11 Fatal error: Uncaught Error: Function name must be a string in /in/XjoQV:11 Stack trace: #0 {main} thrown in /in/XjoQV on line 11
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Fatal error: Uncaught Error: Function name must be a string in /in/XjoQV:11 Stack trace: #0 {main} thrown in /in/XjoQV on line 11
Process exited with code 255.
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Notice: Undefined variable: isUrl in /in/XjoQV on line 11 Fatal error: Function name must be a string in /in/XjoQV on line 11
Process exited with code 255.
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: isUrl in /in/XjoQV on line 11 Fatal error: Function name must be a string in /in/XjoQV on line 11
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Notice: Undefined variable: isUrl in /in/XjoQV on line 11 Fatal error: Call to undefined function: () in /in/XjoQV on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Notice: Undefined variable: isUrl in /in/XjoQV on line 11 Fatal error: Call to undefined function: () in /in/XjoQV on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Notice: Undefined variable: isUrl in /in/XjoQV on line 11 Fatal error: Call to undefined function: () in /in/XjoQV on line 11
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