Question

由于某些原因，我的for循环不是从看起来的外观开始。我通过在其中放置一个echo语句测试它并且它没有显示所以必须有一些错误，也许我的语法，但是看了几个小时后我看不到它。

感谢您的时间。

echo $completedstaffrows; // value of 5
        echo $completedeventrows; //value of 4
            echo "<br/>";

        //Staff

            //For loop to enter the correct amount of rows as entered in the form
            for ($i=0; $i > $completedstaffrows; $i++)
            {

                //Data not inserted into Staff table, FK given from dropdown on form to insert in linking table

                $staffdata = array
                (
                    'staff_id' => $this->input->post ('staff'.$i),
                    'procedure_id' => $procedurefk,
                    'quantity' => $this->input->post ('staff_quantity'.$i),
                    'quantity_sterilised' => NULL, //not implemented yet
                );

                $inserthumanresource = $this->db->insert ('hr', $staffdata);
                echo "hello world"; // to test if for loop working
            }



        //Events

                //For loop to enter all events rows completed by user
                for ($i=0; $i > $completedeventrows; $i++)
                {

                    //First input into "Medical Supplies" table
                    $medsupplies = array
                    (
                        'name' => $this->input->post ('supplies'.$i),
                        'manufacturer' => "Bruce Industries" //To be implemented
                    );

                        //Insert data into table
                        $insertmeds = $this->db->insert ('med_item', $insertmeds);

                        //Get med supplies foreign key for linking table
                        $medsuppliesfk = $this->db->insert_id();

                    //Then input into table "Event"

                    $eventdata = array 
                    (
                        'time' => $this->input->post ('time'.$i),
                        'event' => $this->input->post ('event'.$i),
                        'success' => $this->input->post ('success'.$i),
                        'comment' => $this->input->post ('comment'.$i),
                        'procedure_id' => $procedurefk

                    );
                        //Insert
                        $insertevent = $this->db->insert ('procedure_event', $eventdata);


                        //Get event fk for linking table 
                        $eventfk = $this->db->insert_id();

                    //Linking table "Resources"

                    $resourcedata = array
                    (
                        'event_id' => $eventfk,
                        'medical_item_id' => $medsuppliesfk,
                        'quantity' => NULL, //Not implemented yet
                        'unit' => NULL



                    );

                    $insertresource = $this->db->insert ('resources', $resourcedata);

Answer 1

for ($i=0; $i > $completedstaffrows; $i++)

应阅读：

for ($i=0; $i < $completedstaffrows; $i++)

或者也许：

for ($i=0; $i <= $completedstaffrows; $i++)

Answer 2

变化

for ($i=0; $i > $completedstaffrows; $i++)

到

for ($i=0; $i < $completedstaffrows; $i++)

你想迭代，而我比变量少，而不是更多。

Answer 3

您的操作员不正确。将>切换为<。

Answer 4

您只是在i大于$completedstaffrows时进行循环播放等。将>更改为< s。

Answer 5

$i=0; $i < $completedstaffrows; $i++
       ^^^^^

Answer 6

你写的那个$ completedstaffrows = 5并且你初始化$ i = 0，在你写“$ i＆gt; $ completedstaffrows”的循环中，第一次运行评估为0＆gt; 5恰好是假的。这就是为什么它不能进入循环。所以替换“＆gt;”用“＆lt;”解决问题。

PHP for循环不进入循环

6 个答案: