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Date / File Write / Info / MapPath / MySQL connection / Random Session ID / Redirect by host name / Send email / Sort numbers / Date Time

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Date

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File Write

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Info

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MapPath

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MySQL connection

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Random Session ID

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Redirect by host name

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Send email

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Sort numbers

<?
   /*
   ** Quicksort
   ** input_array is an array of integers
   ** left is the leftmost element to be considered
   ** right is the rightmost element to be considered
   */
   function Quicksort(&$input_array, 
      $left_limit, $right_limit)
   {
      //start pointers
      $left = $left_limit;
      $right = $right_limit;

//Choose the middle element for the pivot
      $pivot_point = intval(($left + $right)/2);
      $pivot = $input_array[$pivot_point];

do
      {
         while(($input_array[$left] < $pivot) AND ($left < $right_limit))
         {
            $left++;
         }
         
         while(($pivot < $input_array[$right]) AND ($right > $left_limit))
         {
         	$right--;
         }
         
         if($left <= $right)
         {
         	//swap elements
         	$temp = $input_array[$left];
         	$input_array[$left] = $input_array[$right];
         	$input_array[$right] = $temp;
         	$left++;
         	$right--;
         }

}
      while($left <= $right);

if($left_limit < $right)
      {
         Quicksort(&$input_array, $left_limit, $right);
      }
      
      if($left < $right_limit)
      {
         Quicksort(&$input_array, $left, $right_limit);
      }
   }

/*
   ** print text with an HTML line break
   */
   function println($text)
   {
      print("$text<BR>\n");
   }

$some_numbers = array(6, 13, 99, 2, 33, 19, 84);

//print array
   print("<H3>Unsorted</H3>\n");
   array_walk($some_numbers, "println");

//sort array
   Quicksort(&$some_numbers, 0, count($some_numbers)-1);

//print array again
   print("<H3>Sorted</H3>\n");
   array_walk($some_numbers, "println");

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Date Time

<?php

// The parameters of this function are the dates to be compared. 
// The first should be prior to the second. The dates are in 
// the form of: 1978-04-26 02:00:00. 
// They also can come from a web form using the global $_POST['start'] 
// and $_POST['end'] variables. 
function date_diff($str_start, $str_end) 
{

$str_start = strtotime($str_start); // The start date becomes a timestamp 
$str_end = strtotime($str_end); // The end date becomes a timestamp

$nseconds = $str_end - $str_start; // Number of seconds between the two dates 
$ndays = round($nseconds / 86400); // One day has 86400 seconds 
$nseconds = $nseconds % 86400; // The remainder from the operation 
$nhours = round($nseconds / 3600); // One hour has 3600 seconds 
$nseconds = $nseconds % 3600; 
$nminutes = round($nseconds / 60); // One minute has 60 seconds, duh! 
$nseconds = $nseconds % 60;

echo $ndays." days, ".$nhours." hours, ".$nminutes." minutes, ".$nseconds." 
echo “seconds<br>\n";

}

// Test the function with several values 
date_diff("1978-04-26", "2003-01-01"); 
date_diff("1984-10-24 15:32:25", "2003-01-01"); 
date_diff("2001-10-28 17:32:25", "2003-01-01 12:00:18");