array方式比较

Posted 2021-03-17 peipeiyu

 1 <?php
 2 header(‘Content-type:text/html;Charset=utf-8‘);
 3 
 4 $start_time = microtime(true);
 5 $a = [];
 6 for ($i=0;$i<100000;$i++) {
 7     $a[‘a1‘] = ‘a1‘;
 8     $a[‘b1‘] = ‘b1‘;
 9     $a[‘c1‘] = ‘c1‘;
10     $a[‘d1‘] = ‘d1‘;
11     $a[‘e1‘] = ‘e1‘;
12     $a[‘f1‘] = ‘f1‘;
13 }
14 
15 $end_time = microtime(true);
16 
17 echo ‘共‘.round($start_time-$end_time,3).‘秒‘;
18 echo "<br>";
19 
20 $start_time = microtime(true);
21 
22 $b = [];
23 for ($i=0;$i<100000;$i++) {
24     $b = [
25         ‘a1‘=>‘a1‘,
26         ‘b1‘=>‘b1‘,
27         ‘c1‘=>‘c1‘,
28         ‘d1‘=>‘d1‘,
29         ‘e1‘=>‘e1‘,
30         ‘f1‘=>‘f1‘
31     ];
32 }
33 
34 $end_time = microtime(true);
35 
36 echo ‘共‘.round($start_time-$end_time,3).‘秒‘;
37 echo "<br>";

结果：

结论：

第一种方式更快