PHP 中的 range()函数

range() - 语法

range ( $low, $high [, $step] );

此函数返回从低到高(含)的元素数组。如果低>高，则序列将从高到低。

range() - 返回值

它返回元素数组。

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range() - 示例

<?php
   foreach (range(0, 6) as $number) {
      echo "$number, ";
   }
   print "\n";
   
   foreach (range(0, 100, 10) as $number) {
      echo "$number, ";
   }
   print "\n";
   
   foreach (range('a', 'c') as $letter) {
      echo "$letter, ";
   }
   print "\n";
   
   foreach (range('f', 'a') as $letter) {
      echo "$letter, ";
   }
   print "\n";
?> 

这将产生以下输出-

0, 1, 2, 3, 4, 5, 6,
0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
a, b, c,
f,e,d,c, b, a