使用最新的到期日期顯示SINGLE RECORDORD

Question

我正在使用FFDB數據庫（平面文件數據庫）。

只要$ vinc字段具有相同的值，但我有5種不同類型的$ vinc值R1，R2，R3，R4，R5 - 如果我添加新記錄，其中$ vinc不是R1，反而會出現空白頁面。

<?php 

    function getbyfunction($selectfn, $orderby = NULL, $includeindex = false) 
    { 
     if (!$this->isopen) 
     { 
      user_error("Database not open.", E_USER_ERROR); 
      return false; 
     } 

     // If there are no records, return 
     if ($this->records == 0) 
      return array(); 

     if (!$this->lock_read()) 
      return false; 

     // Read the index 
     $index = $this->read_index(); 

     // Read each record and add it to an array 
     $rcount = 0; 
     foreach($index as $offset) 
     { 
      // Read the record 
      list($record, $rsize) = $this->read_record($this->data_fp, $offset); 

      // Add it to the result if the $selectfn OK's it 
      if ($selectfn($record) == true) 
      { 
       // Add the index field if required 
       if ($includeindex) 
       $record[FFDB_IFIELD] = $rcount; 

       $result[] = $record; 
      } 

      ++$rcount; 
     } 

     $this->unlock(); 

     // Re-order as required 
     if ($orderby !== NULL) 
      return $this->order_by($result, $orderby); 
     else 
      return $result; 
    } 


    function returnRec($item){ 
      if($item) 
      return true; 
    } 

    $db = new FFDB(); 
    if (!$db->open("foo")) 
    { 
    $schema = array(
     array("key", FFDB_INT, "key"), 
     array("status", FFDB_STRING), 
     array("vinc", FFDB_STRING), 
     array("month", FFDB_STRING), 
     array("day", FFDB_INT), 
     array("year", FFDB_INT) 
    ); 
     // Try and create it... 
    if (!$db->create("foo", $schema)) 
    { 
     echo "Error creating database\n"; 
     return; 
    } 
    } 

    $result = $db->getbyfunction("returnRec", "vinc"); 
     show_rec(end($result)); 

    function show_rec($record){ 
    $number = $record["key"]; 
    $Rvinc = $record["vinc"]; 
    $Rstatus = $record["status"]; 
    $Rday = $record["day"]; 
    $Rmonth = $record["month"]; 
    $Ryear = $record["year"]; 

    $tday = getdate(); 
    $current_year = $tday['year']; 
    $current_month = $tday['month']; 

    if (($status == ON) && ($vinc == R1) && ($month >= $current_month) && ($year ==     current_year)){ 

    echo "myrecord $vinc $status $day $month $year"; 

    } 
    ?> 

有什麼幫助？

由於

---

Yegge，使用show_rec（$結果[0]）;這表明1分的記錄，而是最近到期日期顯示最新的到期日期：08/01/2011 2記錄過期11/01/2011

show_rec（$結果 1記錄到期：

即[0]）;被示出具有到期日期的11/01/2011代替08/01/2011

---

Yegge

show_rec（端（$結果））的記錄;工作只要$ vinc == R1，如果添加另一個記錄，其中vinc不是R1然後顯示一個空白頁，任何想法？

Answer 1

<?php 

    function getbyfunction($selectfn, $orderby = NULL, $includeindex = false) 
    { 
     if (!$this->isopen) 
     { 
      user_error("Database not open.", E_USER_ERROR); 
      return false; 
     } 

     // If there are no records, return 
     if ($this->records == 0) 
      return array(); 

     if (!$this->lock_read()) 
      return false; 

     // Read the index 
     $index = $this->read_index(); 

     // Read each record and add it to an array 
     $rcount = 0; 
     foreach($index as $offset) 
     { 
      // Read the record 
      list($record, $rsize) = $this->read_record($this->data_fp, $offset); 

      // Add it to the result if the $selectfn OK's it 
      if ($selectfn($record) == true) 
      { 
       // Add the index field if required 
       if ($includeindex) 
       $record[FFDB_IFIELD] = $rcount; 

       $result[] = $record; 
      } 

      ++$rcount; 
     } 

     $this->unlock(); 

     // Re-order as required 
     if ($orderby !== NULL) 
      return $this->order_by($result, $orderby); 
     else 
      return $result; 
    } 


    function returnRec($item){ 
      if($item) 
      return true; 
    } 

    $db = new FFDB(); 
    if (!$db->open("foo")) 
    { 
    $schema = array(
     array("key", FFDB_INT, "key"), 
     array("status", FFDB_STRING), 
     array("vinc", FFDB_STRING), 
     array("month", FFDB_STRING), 
     array("day", FFDB_INT), 
     array("year", FFDB_INT) 
    ); 
     // Try and create it... 
    if (!$db->create("foo", $schema)) 
    { 
     echo "Error creating database\n"; 
     return; 
    } 
    } 

    $result = $db->getbyfunction("returnRec", "vinc"); 
    foreach($result as $item) {show_rec($item);break;} 

    function show_rec($record){ 
    $number = $record["key"]; 
    $Rvinc = $record["vinc"]; 
    $Rstatus = $record["status"]; 
    $Rday = $record["day"]; 
    $Rmonth = $record["month"]; 
    $Ryear = $record["year"]; 

     $tday = getdate(); 
    $current_year = $tday['year']; 
    $current_month = $tday['month']; 

    if (($status == ON) && ($vinc == R1) && ($month >= $current_month) && ($year ==     current_year)){ 

    echo "myrecord $vinc $status $day $month $year"; 

    } 
    ?> 

我認爲你需要在循環中使用break，就像上面一樣。

Answer 2

select product, expirationdate from your_table 

where expirationdate > {current_date} order by expirationdate ASC limit 1 

{CURRENT_DATE}是變量，應該從PHP傳遞，或者您可以使用MySQL的功能，而不是

Answer 3

如果我理解正確的代碼，而不是

foreach($result as $item) {show_rec($item);break;} 
//use 
show_rec($result[0]); //only show the very first item in the result array 

編輯：然後用這：

show_rec(end($result)); 

Answer 4

SOLUTION：

我只是想確保發佈的解決方案：從我最初有

$result = $db->getall(lp_month,lp_year); 
$i = 0; 
foreach ($result as $row){ 
    print_r (show_record($row)); 
if ($i >= 1) 
break; 
$i++; 
} 

不是一個很大的不同，但的print_r的代替呼應的伎倆：

print_r (show_record($row)); 

謝謝