php Bubble Sort

phpBubbleSort.php

<?php
  //print_r(time());

  function make_array(){
    $one_array = array();
    for( $i = 1 ; $i < 5000 ; $i++){
      $rand_num = rand(0, 5000);
      $one_array[$i] = $rand_num;
      if ( $i == 1 ){
        $time1 = time();
        print_r('time1:'.$time1);
      }
    }
    //begin to run buddle function
    //print_r($one_array);
    return run_buddle($one_array,$time1);
  }

  function run_buddle($one_array,$time1){
    //print_r($one_array);
    $length = count($one_array);
    echo "<br />";
    print_r('array length:'.$length);
    for($i = 0 ; $i <= $length - 1; $i++){
      for($j = $length - 1; $j >= 1 ; $j--){
        if($one_array[$j] < $one_array[$j - 1]){
          $temp = $one_array[$j];
          $one_array[$j] = $one_array[$j - 1];
          $one_array[$j - 1] = $temp;
        }
      }
      if ( $i == $length - 1 ){
        $time2 = time();
        echo "<br />";
        $time_stamp = $time2 - $time1;
        print_r("time2 - time1 :".$time_stamp);
      }
    }
  }

  make_array();

?>