php将字符串随机分割成不同长度数组的方法

本文实例讲述了php将字符串随机分割成不同长度数组的方法。分享给大家供大家参考。具体分析如下：

这里使用php对字符串在指定的长度范围内进行随机分割，把分割后的结果存在数组里面

function randomsplit($min, $max, $str){
  $a = array();
  while ($str != ''){
    $p = rand($min, $max);
    $p = ($p > strlen($str)) ? strlen($str) : $p;
    $buffer = substr($str, 0, $p);
    $str = substr($str, $p, strlen($str)-$p);
    $a[] = $buffer;
  }
  return $a;
}
//范例：
/*
** example:
*/
$test_string = 'this is a example to test the randomsplit function.';
print_r(randomsplit(1, 7, $test_string));
/*
outputs something like this
(array items are 1 to 7 characters long): 
array
(
  [0] => this
  [1] => is
  [2] => a exam
  [3] => ple to
  [4] => test t
  [5] => he
  [6] => 
  [7] => ran
  [8] => d_spl
  [9] => it f
  [10] => un
  [11] => ction.
)
*/

希望本文所述对大家的php程序设计有所帮助。