From 896d95aec8f5ddb5f638304f9978e0f2f1a32053 Mon Sep 17 00:00:00 2001
From: Kyle Farris <kylefarris@gmail.com>
Date: Sun, 21 Aug 2011 23:03:54 -0300
Subject: Added a function that's able to take some really bad date formats
 from systems that idiots wrote and convert them to something useful.

---
 system/helpers/date_helper.php | 66 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

(limited to 'system/helpers')

diff --git a/system/helpers/date_helper.php b/system/helpers/date_helper.php
index 553e8d7ee..6c559bb25 100644
--- a/system/helpers/date_helper.php
+++ b/system/helpers/date_helper.php
@@ -490,6 +490,72 @@ if ( ! function_exists('human_to_unix'))
 
 // ------------------------------------------------------------------------
 
+/**
+ * Turns many "reasonably-date-like" strings into something
+ * that is actually useful. This only works for dates after unix epoch.
+ * 
+ * @access  public
+ * @param   string  The terribly formatted date-like string
+ * @param   string  Date format to return (same as php date function)
+ * @return  string
+ */
+if ( ! function_exists('nice_date'))
+{
+	function nice_date($bad_date='', $format=false) 
+	{
+		if (empty($bad_date))
+		{
+			return 'Unknown';
+		}
+		// Date like: YYYYMM
+		if (preg_match('/^\d{6}$/',$bad_date)) 
+		{
+			//echo $bad_date." ";
+			if (in_array(substr($bad_date, 0, 2),array('19', '20'))) 
+			{
+				$year  = substr($bad_date, 0, 4);
+				$month = substr($bad_date, 4, 2);
+			} 
+			else 
+			{
+				$month  = substr($bad_date, 0, 2);
+				$year   = substr($bad_date, 2, 4);
+			}
+			return date($format, strtotime($year . '-' . $month . '-01'));
+		    
+		}
+		
+		// Date Like: YYYYMMDD
+		if (preg_match('/^\d{8}$/',$bad_date)) 
+		{
+			$month = substr($bad_date, 0, 2);
+			$day   = substr($bad_date, 2, 2);
+			$year  = substr($bad_date, 4, 4);
+			return date($format, strtotime($month . '/01/' . $year));
+		}
+		
+		// Date Like: MM-DD-YYYY __or__ M-D-YYYY (or anything in between)
+		if (preg_match('/^\d{1,2}-\d{1,2}-\d{4}$/',$bad_date))
+		{ 
+			list($m, $d, $y) = explode('-', $bad_date);
+			return date($format, strtotime("{$y}-{$m}-{$d}"));
+		}
+		
+		// Any other kind of string, when converted into UNIX time,
+		// produces "0 seconds after epoc..." is probably bad...
+		// return "Invalid Date".
+		if (date('U', strtotime($bad_date)) == '0')
+		{ 
+			return "Invalid Date";
+		}
+		
+		// It's probably a valid-ish date format already
+		return date($format, strtotime($bad_date));
+	}
+}
+
+// ------------------------------------------------------------------------
+
 /**
  * Timezone Menu
  *
-- 
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