Onblur/onfocus在PHP内部不起作用

Question

我正在尝试将onfocus/onblur事件添加到表单中，但是不知何故，我没有使它工作。我认为这与逃避报价有关，但是我尝试了几种方法而没有成功。我的代码是：

    echo '<input type="password" id="'.$field->name.'" name="'.$field->name.'" size="30" class="inputbox" placeholder="'.$field->title.'"
                onfocus="this.placeholder = ''" onblur="this.placeholder = '.$field->title.'"
                />'."n";
                break;

Answer 1

您缺少Onblur字符串的引号：

<?php
echo '<input type="password" id="' . $field->name . '" name="' . $field->name . '" size="30" class="inputbox" placeholder="' . $field->title . '" onfocus="this.placeholder = ''" onblur="this.placeholder = '' . $field->title . ''" />'."n";