西安哪个区安全 (西安哪个区安静)

基於犯罪率、噪音水平和生活品質數據

['crime_rate' => 1.2, 'noise_level' => 65, 'quality_of_life' => 8.5],'蓮湖區' => ['crime_rate' => 1.5, 'noise_level' => 68, 'quality_of_life' => 8.0],'新城區' => ['crime_rate' => 1.3, 'noise_level' => 66, 'quality_of_life' => 8.3],'高新區' => ['crime_rate' => 0.9, 'noise_level' => 63, 'quality_of_life' => 9.0],);//按安全性排序行政區usort($districts, function($a, $b) {return $a['crime_rate'] <=> $b['crime_rate'];});// 按安靜性排序行政區usort($districts, function($a, $b) {return $a['noise_level'] <=> $b['noise_level'];});// 按生活品質排序行政區usort($districts, function($a, $b) {return $a['quality_of_life'] <=> $b['quality_of_life'];});// 輸出行政區列表foreach ($districts as $district => $data) {$crime_rate_class = $data['crime_rate'] < 1.5 ? 'green' : 'red';$noise_level_class = $data['noise_level'] < 65 ? 'green' : 'red';$quality_of_life_class = $data['quality_of_life'] > 8.0 ? 'green' : 'red';echo "
• $district 犯罪率：{$data['crime_rate']} 噪音水準：{$data['noise_level']} dB 生活品質：{$data['quality_of_life']}
";} ?>