Onblur/onfocus 无法在内部工作 php

Question

我正在尝试将 onfocus/onblur 事件添加到表单，但不知何故无法正常工作。我认为这与转义引号有关，但我尝试了几种方法都没有成功。我的代码是这样的：

    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

您的 onblur 字符串周围缺少引号：

<?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";