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<?php function percentToDegrees($percent) { $percent = filter_var($percent, FILTER_VALIDATE_INT, array('options' => array('min_range' => 0, 'max_range' => 100))); if ($percent === false) { return false; } return round(($percent / 100) * 180); } var_dump(percentToDegrees(0)); var_dump(percentToDegrees(25)); var_dump(percentToDegrees(50)); var_dump(percentToDegrees(75)); var_dump(percentToDegrees(100));
Output for 5.2.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
float(0) float(45) float(90) float(135) float(180)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function filter_var() in /in/5k1X2 on line 4
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: filter_var() in /in/5k1X2 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: filter_var() in /in/5k1X2 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: filter_var() in /in/5k1X2 on line 4