提交后不要重置表单值

Question

通过 php 标头代码进行预览后，我不想重置输入框？谢谢。\n这是我的简化代码：

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#php Code \nif($_POST[\'pre\']){\n\n    $tag = $_POST[\'tag\'];\n    $link = $_POST[\'link\'];\n    $img = $_POST[\'img\'];\n    $exp = $_POST[\'exp\'];\n    $alt = $_POST[\'alt\'];\n    if ( $tag == \'\' or $img == \'\' or $alt==\'\'){\n\n    }\n    else{\n    $_SESSION[\'pre\'] = "<a href=" ;\n    $_SESSION[\'pre\'] .= "\\"$link\\"><img src=";\n    $_SESSION[\'pre\'] .= "\\"$img\\" alt=\\"$alt\\" ></a>";\n    header("location: add_adv.php?show=on");\n    }\n}\n

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html代码

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<table>\n<tr><td id="title"><p>add</p></td></tr>\n<tr><td></td></tr>\n    <tr>\n      <td><form name="form2" method="post" action="">\n        <table>\n          <tr>\n            <td><input type="text" name="tag" id="tag" /> </td>\n            <td>tag</td>\n          </tr>\n          <tr>\n            <td><input type="text" size="30" name="img" id="img" /></td>\n            <td>picture</td>\n          </tr>\n          <tr>\n            <td><input type="text" size="30" name="link" id="link" /></td>\n            <td>link</td>\n          </tr>\n          <tr>\n            <td><input type="text" size="30" name="alt" id="alt" /></td>\n            <td>alternative</td>\n          </tr>\n          <tr>\n            <td><input type="text" size="30" name="exp" id="exp" /></td>\n            <td>Expire</td>\n          </tr>\n          <tr>\n            <td><input name="pre" type="submit" class="sub" id="pre" value="Preview">\n              <input type="submit" name="add_adv" class="sub" id="add_adv" value="\xd8\xa7\xd8\xb6\xd8\xa7\xd9\x81\xd9\x87" /></td>\n            <td></td>\n          </tr>\n    </table>\n      </form>\n</td>\n    </tr>\n  </table>\n

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Answer 1

您必须为所有输入框指定一个等于先前提交的值的值属性。

<td><input type="text" size="30" name="exp" id="exp" value="<?=$exp?>" /></td>
<td>Expire</td>