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run code in 300+ PHP versions simultaneously
<?php browser(); function browser() { $browsers = array('chrome', 'msie', 'firefox', 'safari'); for ($i = 0; $i < count($browsers); $i++) { if ($_SERVER['HTTP_USER_AGENT'] == $browsers[$i]) { echo "You are using {$browsers[$i]}."; } } }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "HTTP_USER_AGENT" in /in/cXYUR on line 6 Warning: Undefined array key "HTTP_USER_AGENT" in /in/cXYUR on line 6 Warning: Undefined array key "HTTP_USER_AGENT" in /in/cXYUR on line 6 Warning: Undefined array key "HTTP_USER_AGENT" in /in/cXYUR on line 6

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