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1 <?php 2 3 /** 4 * FeedDate is an internal class that stores a date for a feed or feed item. 5 * Usually, you won't need to use this. 6 */ 7 class FeedDate 8 { 9 protected $unix; 10 11 /** 12 * Creates a new instance of FeedDate representing a given date. 13 * Accepts RFC 822, ISO 8601 date formats as well as unix time stamps. 14 * 15 * @param mixed $dateString optional the date this FeedDate will represent. If not specified, the current date and 16 * time is used. 17 */ 18 public function __construct($dateString = "") 19 { 20 if ($dateString == "") { 21 $dateString = date("r"); 22 } 23 24 if (is_integer($dateString)) { 25 $this->unix = $dateString; 26 27 return; 28 } 29 $tzOffset = 0; 30 if (preg_match( 31 "~(?:(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun),\\s+)?(\\d{1,2})\\s+([a-zA-Z]{3})\\s+(\\d{4})\\s+(\\d{2}):(\\d{2}):(\\d{2})\\s+(.*)~", 32 $dateString, 33 $matches 34 )) { 35 $months = Array( 36 "Jan" => 1, 37 "Feb" => 2, 38 "Mar" => 3, 39 "Apr" => 4, 40 "May" => 5, 41 "Jun" => 6, 42 "Jul" => 7, 43 "Aug" => 8, 44 "Sep" => 9, 45 "Oct" => 10, 46 "Nov" => 11, 47 "Dec" => 12, 48 ); 49 $this->unix = mktime($matches[4], $matches[5], $matches[6], $months[$matches[2]], $matches[1], $matches[3]); 50 if (substr($matches[7], 0, 1) == '+' OR substr($matches[7], 0, 1) == '-') { 51 $tzOffset = (((int)substr($matches[7], 0, 3) * 60) + (int)substr($matches[7], -2)) * 60; 52 } else { 53 if (strlen($matches[7]) == 1) { 54 $oneHour = 3600; 55 $ord = ord($matches[7]); 56 if ($ord < ord("M")) { 57 $tzOffset = (ord("A") - $ord - 1) * $oneHour; 58 } elseif ($ord >= ord("M") AND $matches[7] != "Z") { 59 $tzOffset = ($ord - ord("M")) * $oneHour; 60 } elseif ($matches[7] == "Z") { 61 $tzOffset = 0; 62 } 63 } 64 switch ($matches[7]) { 65 case "UT": 66 case "GMT": 67 $tzOffset = 0; 68 } 69 } 70 $this->unix += $tzOffset; 71 72 return; 73 } 74 if (preg_match("~(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})(.*)~", $dateString, $matches)) { 75 $this->unix = mktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]); 76 if (substr($matches[7], 0, 1) == '+' OR substr($matches[7], 0, 1) == '-') { 77 $tzOffset = (((int)substr($matches[7], 0, 3) * 60) + (int)substr($matches[7], -2)) * 60; 78 } else { 79 if ($matches[7] == "Z") { 80 $tzOffset = 0; 81 } 82 } 83 $this->unix += $tzOffset; 84 85 return; 86 } 87 $this->unix = 0; 88 } 89 90 /** 91 * Gets the date stored in this FeedDate as an RFC 822 date. 92 * 93 * @return string a date in RFC 822 format 94 */ 95 public function rfc822() 96 { 97 //return gmdate("r",$this->unix); 98 $date = gmdate("D, d M Y H:i:s O", $this->unix); 99 100 return $date; 101 } 102 103 /** 104 * Gets the date stored in this FeedDate as an ISO 8601 date. 105 * 106 * @return string a date in ISO 8601 format 107 */ 108 public function iso8601() 109 { 110 $date = gmdate("Y-m-d\TH:i:sP", $this->unix); 111 112 return $date; 113 } 114 115 /** 116 * Gets the date stored in this FeedDate as unix time stamp. 117 * 118 * @return int a date as a unix time stamp 119 */ 120 public function unix() 121 { 122 return $this->unix; 123 } 124 }
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