從MySql到Excel的PHP select語句。 格式化日期為YYYYMMDD

Question

注意：在MySql數據庫中，“ dob”是varchar，格式為：mm / dd / yyyy

出生日期，Cvrg有效日期和Cvrg到期日期在到達Excel中時需要從mm / dd / yyyy更改為yyyymmdd。 請參見下面的代碼：

    <?php 
    if($qry == "ok"){
     // get db connection
     include("connection string goes here");

     $select = "SELECT 'A' AS 'Transaction Type', policyno AS 'UHCSR Policy No', school                 AS 'Campus Location Description', Code AS 'Campus Location Number', '' AS 'Date Received by         UHCSR', '' AS 'Date Stamped By School', '' AS 'Social Security Number', SSN AS 'StudentID Number', 
      lname AS 'LastName', fname AS 'FirstName', mi AS 'Middle Initial', dob AS 'Date of Birth', gender AS 'Gender',
      concat( concat(address1, ' '), address2) AS '(Mailing) Address Ln 1','' AS '(Mailing) Address Ln 2',city AS '(Mailing) City', state AS '(Mailing) State', zipcode AS '(Mailing) ZipCode', '' AS '(Mailing) ZipCode Suffix', 
      '' AS '(Permanent) Address Ln 1', '' AS '(Permanent) Address Ln 2', '' AS '(Permanent) City', '' AS '(Permanent) State', '' AS '(Permanent) ZipCode', '' AS '(Permanent) ZipCode Suffix', email AS 'Email Address', replace(phone, '-', '') AS 'Telephone Number', 'ITL' AS 'Insured Category Code', '' AS 'Insured Type Code', 'A' AS 'Insured (Row)ID Code', period AS 'Period Code', semester AS 'Cvrg Period Description',
      trim(left(coveragedate, locate('-', coveragedate)-1)) AS 'Cvrg Effective Date',
      trim(replace(right(coveragedate, locate('-', coveragedate)+0),'-','')) AS 'Cvrg          Expiration Date',
      noadfee AS 'Premium Amount', quantity AS 'Coverage Period Quantity', '' AS 'Primary Insured SSN', SSN AS 'Primary Insured Student ID', '' AS 'Organization Name',  '' AS 'Organization Number', '' AS 'Dependent Coverage Code',  '' AS 'Check Number',  '' AS 'Credit Card Number',  '' AS 'Credit Card Expiration Month',  '' AS 'Credit Card Expiration Year', tedfee AS 'Amount Paid', paytype AS 'Pay Type'
     FROM intenrollment
     WHERE confirm = 'Y' and amountpaid != '0' and (policyno LIKE '%200473-%' OR policyno LIKE '%2060-%'  OR policyno LIKE '%202377-%' or policyno='')";

      if ( $smon != "None" and $sday != "None" and $syear != "None" and $emon != "None" and $eday != "None" and $eyear != "None" )
      {
       $startdate = strtotime("$smon $sday, $syear");
       $enddate = strtotime("$emon $eday, $eyear");
       $select .= "AND applydate BETWEEN $startdate AND $enddate ";
      } elseif ( $smon != "None" and $sday != "None" and $syear != "None" ) {
       $startdate = strtotime("$smon $sday, $syear");
       $select .= "AND applydate > $startdate ";
      } elseif ( $emon != "None" and $eday != "None" and $eyear != "None" ) {
       $enddate = strtotime("$emon $eday, $eyear");
       $select .= "AND applydate < $enddate ";
      }

      $select .= "ORDER BY school ASC, lname ASC";

      // run query
      $export = mysql_query($select) or die(mysql_error());
      $fields = mysql_num_fields($export);

      // get field info for headers
      $header = '';
      for ( $i = 0; $i < $fields; $i++ )
      {
       $header .= mysql_field_name($export, $i) . "\t";
      }

      // extract data and convert into excel readable format
      $data = '';
      while ( $row = mysql_fetch_row($export))
      {
       $line = '';
       foreach ( $row as $value )
       {
        if ( ( !isset($value) ) OR ( $value == "" ) )
        {
         $value = "\t";
        } 
        else 
        {    
         $value = str_replace('"', '""', $value);
        $value = '="' . $value . '"' . "\t";
     //        ^
     //        Added an equal sign
        }
        $line .= $value;
       }
       $data .= trim($line)."\n";
      }
      $data = str_replace("\r", "", $data);

      // return message if query returns no data
      if ( $data == "" )
      {
       $data = "\n(0) Records Found!\n";
      }

      // setup headers with no caching
      header("Content-type: application/octet-stream");
      header("Content-Disposition: attachment; filename=data.xls");
      header("Pragma: no-cache");
      header("Expires: 0");
      print "$header\n$data";
     } else {
     ?> 
     <style>
     body,td,table {font-family:Arial; font-size:10px;} 
     select {font-family:Arial; font-size:12px;}
     </style>
     <table align="center">
     <tr><td align=center><a href="index.php"><font size=2>Back to          Menu</font></a></td></tr>
     <tr><td>
     <form action="extract2.php" method="post">
     Start:
     <select name='smon' size='1'>
     <option value="None">Month</option>
     <option value='January'>January</option>
     <option value='February'>February</option>
     <option value='March'>March</option>
     <option value='April'>April</option>
     <option value='May'>May</option>
     <option value='June'>June</option>
     <option value='July'>July</option>
     <option value='August'>August</option>
     <option value='September'>September</option>
     <option value='October'>October</option>
     <option value='November'>November</option>
     <option value='December'>December</option>
     </select>&nbsp;

     <select name="sday">
     <option value="None">Day</option>
     <?
     for($ctr=1; $ctr<=31;++$ctr){
       if($row[sday] == $ctr){
         print("<option value='$ctr' selected>$ctr</option>");
       }
       else{
         print("<option value='$ctr'>$ctr</option>");
       }
     }
     echo "</select>&nbsp";

     echo "<select name='syear' size='1'>";
       $today = getdate(); 
       $yr = $today['year']; 
     ?>
     <option value="None">Year</option>";
     <option value='2005'>2005</option>";
     <option value='2006'>2006</option>";
     <option value='2007'>2007</option>";
     <option value='2008'>2008</option>";
     <option value='2009'>2009</option>";
     <option value='2010'>2010</option>";
     </select>&nbsp;-&nbsp;
     End:
     <select name='emon' size='1'>
     <option value="None">Month</option>
     <option value='January'>January</option>
     <option value='February'>February</option>
     <option value='March'>March</option>
     <option value='April'>April</option>
     <option value='May'>May</option>
     <option value='June'>June</option>
     <option value='July'>July</option>
     <option value='August'>August</option>
     <option value='September'>September</option>
     <option value='October'>October</option>
     <option value='November'>November</option>
     <option value='December'>December</option>
     </select>&nbsp;

     <select name="eday">
     <option value="None">Day</option>
     <?
     for($ctr=1; $ctr<=31;++$ctr){
       if($row[eday] == $ctr){
         print("<option value='$ctr' selected>$ctr</option>");
       }
       else{
         print("<option value='$ctr'>$ctr</option>");
       }
     }
     echo "</select>&nbsp";

     echo "<select name='eyear' size='1'>";
       $today = getdate(); 
       $yr = $today['year']; 
     ?>
     <option value="None">Year</option>";
     <option value='2005'>2005</option>";
     <option value='2006'>2006</option>";
     <option value='2007'>2007</option>";
     <option value='2008'>2008</option>";
     <option value='2009'>2009</option>";
     <option value='2010'>2010</option>";
     </select>&nbsp;
     <input type="submit" value="Select">
     <input type="hidden" name="qry" value="ok">  
     </tr>
     <tr><td align=center style="font-famiy:Tahoma; font-size:12px; color:777777;">If          you do not enter a date, all records will be displayed.</td></tr>
     </form>
     </table><p>

     <?
     }
     ?>

Answer 1

給定特定格式的日期，通常可以使用date和strtotime進行快速轉換，如下所示：

// convert old date string to YYYYmmdd format
$date = date('Ymd', strtotime($old_date_string));

Answer 2

您可以使用mysql date_format函數，例如

DATE_FORMAT(dob,'%Y%m%d') AS 'Date of Birth',

今天給出20100118

編輯：因為dob是varchar，您應該在foreach中檢查它，只使用字符串函數，否則cballou的答案將為您服務

foreach ( $row as $key => $value )
   {
    if ( ( !isset($value) ) OR ( $value == "" ) )
    {
     $value = "\t";
    } 
    else 
    {
 if($key == 'Date of Birth') {
    $exploded_value = explode("/",$value);
    $value = $value[2].$value[0].$value[1];
    // or according to cballou's answer
    //$value = date('Ymd',strtotime($value));
 }
     $value = str_replace('"', '""', $value);
    $value = '="' . $value . '"' . "\t";
 //        ^
 //        Added an equal sign
    }
    $line .= $value;
   }