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<?php $url = $_GET["u"]; if(parse_url($url, PHP_URL_HOST) === "example.com" ) { echo "<script>window.location.href = '" . htmlspecialchars($url, ENT_QUOTES) . "';</script>"; } else { echo "<script>window.location.href = 'https://example.com';</script>"; }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "u" in /in/PU24n on line 3 Deprecated: parse_url(): Passing null to parameter #1 ($url) of type string is deprecated in /in/PU24n on line 5 <script>window.location.href = 'https://example.com';</script>

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