Question

我有一个HTML table并且我使用PHP ..表格中的数据来自CSV file。

我已经可以在文件末尾的新行中添加新数据了。我的问题是，如果我想删除CSV文件中数据中间的现有行，该怎么办？我怎样才能做到这一点？顺便说一句，我不在这里使用任何数据库。我只使用HTML Table和CSV file。以下是我查看CSV和添加新数据的代码。

查看

<?php
                            $row = 1;
                                if (($handle = fopen("bin/pdw_table.csv", "r+")) !== FALSE) {

                        ?>
                                    <table class="table table-hover table-striped table-bordered" id="table-data">
                                        <tr>
                                            <th>Field 1</th>
                                            <th>Field 2</th>
                                            <th>Field 3</th>
                                            <th></th>
                                            <th>Field 4</th>
                                            <th>Field 5</th>
                                            <th></th>
                                            <th></th>
                                            <th>Field 6</th>
                                            <th>Field 7</th>
                                            <th>Field 8</th>
                                            <th>Field 9</th>
                                            <th>Field 10</th>
                                            <th>Field 11</th>
                                            <th>Field 12</th>
                                            <th>Field 13</th>
                                            <th></th>
                                            <th>Field 14</th>
                                            <th>Field 15</th>
                                            <th>Field 16</th>
                                        </tr>
                        <?php
                                        while (($data = fgetcsv($handle, 1000, ',')) !== FALSE) {
                                            $num = count($data);
                        ?>
                                            <tr <?php if($row==0){echo "style='font-weight:bold; background-color:#CCCCCC'";} else {echo "style='background-color:#DDDDDD'";} ?> style="background-color:#DDDDDD">
                        <?php
                                                for ($c=0; $c < $num; $c++) {
                        ?>
                                                <td><?php echo $data[$c]; ?></td>  
                        <?php
                            }
                        ?>
                                            </tr>
                        <?php

                                        $row++;
                                        }
                                        fclose($handle);
                        ?>
                                        <form method="post" name="add1" id="add1" action="<?php echo base_url();?>index.php/datacast_ctr/write_csv" autocomplete="off">
                                            <tr class="td1" id="td1" >  
                                                <td><input type="text" name="val1" id="val1"/></td>
                                                <td><input type="text" name="val2" id="val2"/></td>
                                                <td><input type="text" name="val3" id="val3"/></td>
                                                <td></td>
                                                <td><input type="text" name="val4" id="val4"/></td>
                                                <td><input type="text" name="val5" id="val5"/></td>
                                                <td></td>
                                                <td></td>
                                                <td><input type="text" name="val6" id="val6"/></td>
                                                <td><input type="text" name="val7" id="val7"/></td>
                                                <td><input type="text" name="val8" id="val8"/></td>
                                                <td><input type="text" name="val9" id="val9"/></td>
                                                <td><input type="text" name="val10" id="val10"/></td>
                                                <td><input type="text" name="val11" id="val11"/></td>
                                                <td><input type="text" name="val12" id="val12"/></td>
                                                <td><input type="text" name="val13" id="val13"/></td>
                                                <td></td>
                                                <td><input type="text" name="val14" id="val14"/></td>
                                                <td><input type="text" name="val15" id="val15"/> </td>
                                                <td><input type="text" name="val16" id="val16"/></td>
                                            </tr>
                                        </form>
                                    </table>
                        <?php
                            }
                        ?>

CONTROLLER（添加新数据EOF的代码）

function write_csv()
{
    $R1 = $this->input->post('val1');
    $R2 = $this->input->post('val2');
    $R3 = $this->input->post('val3');
    $H1 = $this->input->post('valh1');
    $R4 = $this->input->post('val4');
    $R5 = $this->input->post('val5');
    $H2 = $this->input->post('valh2');
    $H3= $this->input->post('valh3');
    $R6 = $this->input->post('val6');
    $R7 = $this->input->post('val7');
    $R8 = $this->input->post('val8');
    $R9 = $this->input->post('val9');
    $R10 = $this->input->post('val10');
    $R11 = $this->input->post('val11');
    $R12 = $this->input->post('val12');
    $R13 = $this->input->post('val13');
    $H4 = $this->input->post('valh4');
    $R14 = $this->input->post('val14');
    $R15 = $this->input->post('val15');
    $R16 = $this->input->post('val16');
    $H5 = $this->input->post('valh5');

    $data = $R1.",".$R2.",".$R3.",".$H1.",".$R4.",".$R5.",".$H2.",".$H3.",".$R6.",".$R7.",".$R8.",".$R9.",".$R10.",".$R11.",".$R12.",".$R13.",".$H4.",".$R14.",".$R15.",".$R16;
    $list = array($data);

    $file = fopen("./bin/pdw_table.csv","a+");

    foreach ($list as $line)
    {
        fputcsv($file,explode(',',$line));
    }

    fclose($file);
    redirect('datacast_ctr');
}

Answer 1

AFAIK你不能只删除一行那么简单。您必须打开文件，一个接一个地读取所有行并将它们放入输出文件中，除了要删除的文件或使用this解决方案。

如果您想知道如何实现它，它取决于您的csv文件中的数据。如果你有某种唯一键，你可以添加另一个带有按钮的列或任何调用delete函数传递此键的内容。

EDIT 这是伪代码，因为我目前没有php环境。但有点像 $ filedata =“”; $ line =“”;

$f = fopen("<filename>", "c+");
while($line = fgets ($f)){
    if($line != "check here if the line is the one to delete"){
        $data.= $line;
    }
}
ftruncate($f,0);
fputs($f, $data);
fclose($f);

使用HTML表删除CSV文件中的特定行

1 个答案: