在PHP中無限循環

Question

每當我嘗試運行這段代碼時，它就好像進入了一個無限循環。但是，我不知道是什麼導致這個問題。也許一個額外的眼睛就可以指出這個問題？

的問題時，纔會有不同的年份區域，例如2012年至2018年

例accours函數：$ this-> budget_model-> set_monthly_budget（ '1'， '2012'， '8'， '2014' ， '1'）;

function set_monthly_budget($start_month, $start_year, $end_month, $end_year, $budget_group_id) 
{ 

    $user_id = 2; 

    // Current date 
    $current_month = $start_month; 
    $current_year = $start_year; 
    $days_in_current_month = cal_days_in_month(CAL_GREGORIAN, $current_month, $current_year); 
    $company_id = 1; 
    $month_goal = 100; 

    // Check if it is the current month 
    if($start_year == $end_year) 
    { 

     for($x=$current_month;$x<=$end_month;$x++) 
     { 

      $data = array(
       'user_id' => $user_id, 
       'budget_group_id' => $budget_group_id, 
       'month' => $x, 
       'year' => $start_year, 
       'company_id' => $company_id, 
       'month_goal' => $month_goal 
      ); 

      // Inserting information into the database 
      $this->db->insert('budget_month',$data); 

     } 

     return true; // Return true if the task was completed 

    } 

    if($start_year !== $end_year) 
    { 

     $temp_start_year = $start_year; 

     while($temp_start_year !== $end_year) 
     { 

      // Check if we are in the same year as we started 
      if($temp_start_year == $current_year) 
      { 

       // Insert remaining months for this year 
       for($x=$current_month;$x<=12;$x++) 
       { 

        $data = array(
         'user_id' => $user_id, 
         'budget_group_id' => $budget_group_id, 
         'month' => $x, 
         'year' => $temp_start_year, 
         'company_id' => $company_id, 
         'month_goal' => $month_goal 
        ); 

        // Inserting information into the database 
        $this->db->insert('budget_month',$data); 

       } 

      } 

      // Check if the temp and end year is the same 
      if($temp_start_year < $end_year) 
      { 

       // Insert remaining months for this year 
       for($x=1;$x<=12;$x++) 
       { 

        $data = array(
         'user_id' => $user_id, 
         'budget_group_id' => $budget_group_id, 
         'month' => $x, 
         'year' => $temp_start_year, 
         'company_id' => $company_id, 
         'month_goal' => $month_goal 
        ); 

        // Inserting information into the database 
        $this->db->insert('budget_month',$data); 

       } 

      } 

      // Check if we are in the same year as we started 

      if($temp_start_year == $end_year) 
      { 

       // Insert remaining months for this year 
       for($x=1;$x<=$end_month;$x++) 
       { 

        $data = array(
         'user_id' => $user_id, 
         'budget_group_id' => $budget_group_id, 
         'month' => $x, 
         'year' => $temp_start_year, 
         'company_id' => $company_id, 
         'month_goal' => $month_goal 
        ); 

        // Inserting information into the database 
        $this->db->insert('budget_month',$data); 

       } 

      } 

      $temp_start_year++; 

     } 

    } 

} 

Answer 1

在你的代碼

while($temp_start_year !== $end_year) 

你使用！==這也檢查2個變量的類型是相同的。

，但此行

$temp_start_year++; 

將隱式轉換變量爲整數。

因此，！==會將整數與字符串進行比較，該字符串將始終評估爲true。

解決方法與使用！=而不是！==一樣簡單，或者在調用函數（刪除單引號）時輸入整數而不是字符串。