PHP的DateTime :: createFromFormat替代<5.3丟失strptime

Question

前一個問我問this問題。現在我需要在生產服務器上運行它，但服務器是5.2.9 ...

我該如何編寫一個替代函數，該函數能讓我將精確的結果作爲DateTime :: createFromFormat函數？我知道有重複，但他們都使用strptime。但是當我嘗試使用它時，我得到：Fatal error: Call to undefined function strptime()。

並且不，我無法訪問此生產服務器，所以我無法更改它的任何設置。

Answer 1

包括這一點，你可以使用strptime：

/* 
* This work of Lionel SAURON (http://sauron.lionel.free.fr:80) is licensed under the 
* Creative Commons Attribution 2.0 France License. 
* 
* To view a copy of this license, visit http://creativecommons.org/licenses/by/2.0/fr/ 
* or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA. 
*/ 

/** 
* Parse a time/date generated with strftime(). 
* 
* This function is the same as the original one defined by PHP (Linux/Unix only), 
* but now you can use it on Windows too. 
* Limitation : Only this format can be parsed %S, %M, %H, %d, %m, %Y 
* 
* @author Lionel SAURON 
* @version 1.0 
* @public 
* 
* @param $sDate(string) The string to parse (e.g. returned from strftime()). 
* @param $sFormat(string) The format used in date (e.g. the same as used in strftime()). 
* @return (array)   Returns an array with the <code>$sDate</code> parsed, or <code>false</code> on error. 
*/ 
if(function_exists("strptime") == false) 
{ 
    function strptime($sDate, $sFormat) 
    { 
     $aResult = array 
     (
      'tm_sec' => 0, 
      'tm_min' => 0, 
      'tm_hour' => 0, 
      'tm_mday' => 1, 
      'tm_mon' => 0, 
      'tm_year' => 0, 
      'tm_wday' => 0, 
      'tm_yday' => 0, 
      'unparsed' => $sDate, 
     ); 

     while($sFormat != "") 
     { 
      // ===== Search a %x element, Check the static string before the %x ===== 
      $nIdxFound = strpos($sFormat, '%'); 
      if($nIdxFound === false) 
      { 

       // There is no more format. Check the last static string. 
       $aResult['unparsed'] = ($sFormat == $sDate) ? "" : $sDate; 
       break; 
      } 

      $sFormatBefore = substr($sFormat, 0, $nIdxFound); 
      $sDateBefore = substr($sDate, 0, $nIdxFound); 

      if($sFormatBefore != $sDateBefore) break; 

      // ===== Read the value of the %x found ===== 
      $sFormat = substr($sFormat, $nIdxFound); 
      $sDate = substr($sDate, $nIdxFound); 

      $aResult['unparsed'] = $sDate; 

      $sFormatCurrent = substr($sFormat, 0, 2); 
      $sFormatAfter = substr($sFormat, 2); 

      $nValue = -1; 
      $sDateAfter = ""; 

      switch($sFormatCurrent) 
      { 
       case '%S': // Seconds after the minute (0-59) 

        sscanf($sDate, "%2d%[^\\n]", $nValue, $sDateAfter); 

        if(($nValue < 0) || ($nValue > 59)) return false; 

        $aResult['tm_sec'] = $nValue; 
        break; 

       // ---------- 
       case '%M': // Minutes after the hour (0-59) 
        sscanf($sDate, "%2d%[^\\n]", $nValue, $sDateAfter); 

        if(($nValue < 0) || ($nValue > 59)) return false; 

        $aResult['tm_min'] = $nValue; 
        break; 

       // ---------- 
       case '%H': // Hour since midnight (0-23) 
        sscanf($sDate, "%2d%[^\\n]", $nValue, $sDateAfter); 

        if(($nValue < 0) || ($nValue > 23)) return false; 

        $aResult['tm_hour'] = $nValue; 
        break; 

       // ---------- 
       case '%d': // Day of the month (1-31) 
        sscanf($sDate, "%2d%[^\\n]", $nValue, $sDateAfter); 

        if(($nValue < 1) || ($nValue > 31)) return false; 

        $aResult['tm_mday'] = $nValue; 
        break; 

       // ---------- 
       case '%m': // Months since January (0-11) 
        sscanf($sDate, "%2d%[^\\n]", $nValue, $sDateAfter); 

        if(($nValue < 1) || ($nValue > 12)) return false; 

        $aResult['tm_mon'] = ($nValue - 1); 
        break; 

       // ---------- 
       case '%Y': // Years since 1900 
        sscanf($sDate, "%4d%[^\\n]", $nValue, $sDateAfter); 

        if($nValue < 1900) return false; 

        $aResult['tm_year'] = ($nValue - 1900); 
        break; 

       // ---------- 
       default: 
        break 2; // Break Switch and while 

      } // END of case format 

      // ===== Next please ===== 
      $sFormat = $sFormatAfter; 
      $sDate = $sDateAfter; 

      $aResult['unparsed'] = $sDate; 

     } // END of while($sFormat != "") 

     // ===== Create the other value of the result array ===== 
     $nParsedDateTimestamp = mktime($aResult['tm_hour'], $aResult['tm_min'], $aResult['tm_sec'], 
           $aResult['tm_mon'] + 1, $aResult['tm_mday'], $aResult['tm_year'] + 1900); 

     // Before PHP 5.1 return -1 when error 
     if(($nParsedDateTimestamp === false) 
     ||($nParsedDateTimestamp === -1)) return false; 

     $aResult['tm_wday'] = (int) strftime("%w", $nParsedDateTimestamp); // Days since Sunday (0-6) 
     $aResult['tm_yday'] = (strftime("%j", $nParsedDateTimestamp) - 1); // Days since January 1 (0-365) 

     return $aResult; 
    } // END of function 

} // END of if(function_exists("strptime") == false) 

然而，由於日期時間:: createFromFormat返回的DateTime的一個對象，你不能得到完全相同的結果在PHP 5.3 <（除非你願意寫你自己的類，其行爲完全像DateTime）