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php:include应用
Serendipity-Ling
Original
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1.我的header模板:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="dist/css/bootstrap.css">
    <script src="jquery-3.2.1.js"></script>
    <script src="dist/js/bootstrap.js"></script>
    <style>
        footer{
            line-height: 50px;
        }
    </style>
    <title>YourTitle</title>
</head>
<body>
<div class="container">
    <div class="row">
        <div class="col-md-12">
            <nav class="navbar navbar-default navbar-inverse">
                <div class="container-fluid">
                    <!-- Brand and toggle get grouped for better mobile display -->
 <div class="navbar-header">
                        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
                            <span class="sr-only">Toggle navigation</span>
                            <span class="icon-bar"></span>
                            <span class="icon-bar"></span>
                            <span class="icon-bar"></span>
                        </button>
                        <a class="navbar-brand" href="#">Serendipity-Ling</a>
                    </div>

                    <!-- Collect the nav links, forms, and other content for toggling -->
 <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                        <ul class="nav navbar-nav">
                            <li class="active"><a href="#">首页 <span class="sr-only">(current)</span></a></li>
                            <li><a href="#">路线</a></li>
                            <li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">分类<span class="caret"></span></a>
                                <ul class="dropdown-menu">
                                    <li><a href="#">Action</a></li>
                                    <li><a href="#">Another action</a></li>
                                    <li><a href="#">Something else here</a></li>
                                    <li role="separator" class="divider"></li>
                                    <li><a href="#">Separated link</a></li>
                                    <li role="separator" class="divider"></li>
                                    <li><a href="#">One more separated link</a></li>
                                </ul>
                            </li>
                        </ul>
                        <form class="navbar-form navbar-left">
                            <div class="form-group">
                                <input type="text" class="form-control" placeholder="Search">
                            </div>
                            <button type="submit" class="btn btn-default">搜索</button>
                        </form>
                        <ul class="nav navbar-nav navbar-right">
                            <!--<li><a href="#">联系我</a></li>-->
 <li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">关于 <span class="caret"></span></a>
                                <ul class="dropdown-menu">
                                    <li><a href="#">QQ</a></li>
                                    <li><a href="#">We Chat</a></li>
                                    <li><a href="#">Mail</a></li>
                                    <!--<li role="separator"></li>-->
                                    <!--<li><a href="#">Separated link</a></li>-->
 </ul>
                            </li>
                        </ul>
                    </div><!-- /.navbar-collapse -->
 </div><!-- /.container-fluid -->
 </nav>
        </div>
    </div>    <!-- header-->

QQ图片20171228171139.png

2. 我的footer模板:

<div class="row"><!-- footer-->
    <div class="col-md-12">
        <footer class="navbar navbar-default navbar-inverse text-center">
            <span><a href="#">凌真华的博客</a></span>
        </footer>
    </div>
</div>
</div>
</body>
</html>

QQ图片20171228171302.png

3. 当两份模板做好后,采用php里的include函数

       首先我先建立一个公共文件夹,文件夹名为inc。讲上面的两个模板各自保存为php文件,取名header.php和footer.php, 放在inc里。

        采用下面的代码,将这两个模板放在同一页面

<?php include_once 'inc/header.php' ?>
<!-- 页面主体内容-->
<div height="200px" style="background-color: skyblue;border: 1px solid black;margin-bottom: 20px">
<h2>大家好,我是页面主体内容</h2></div>
<?php include_once 'inc/footer.php' ?>

QQ图片20171228172142.png


include

include与require的区别:

require一个文件存在错误的话,那么程序就会中断执行了,并显示致命错误 
include一个文件存在错误的话,那么程序不会中端,而是继续执行,并显示一个警告错误。 

include_once:表示只将文件导入一次

include一般是放在流程控制的处理部分中PHP程序网页在读到include的文件时,才将它读进来。这种方式可以把程序执行时的流程简单化。 

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