初识PHP,初识教育技术
1.在PHP中,全局变量都要大写;
2.在PHP表单提交方式中,method属性设置了获取和提交数据的方式;
3.如果在表单中使用了上传元素,那么就要给表单添加属性:enctype="multipart/form-data";
4.注销用户功能的实现:
复制代码 代码如下:
session_start(); //启动会话
unset($_SESSION['user']); //删除单个会话
unset($_SESSION['pwd']); //删除单个会话
session_destory(); //结束当前回话
header("location:index.php"); //重定向
?>
删除多个会话:$_SESSION=array();
5.php中遍历对象:
复制代码 代码如下:
for($i=0;$i
}
6.php中包含文件:include("文件路径");
7.在HTML页面中嵌入js脚本的方式:
复制代码 代码如下:
8.在php动态页面中引用JS文件:
复制代码 代码如下:
或是:
9.解决浏览器不支持JavaScript问题:
a.开启IE浏览器对JavaScript的支持;
b.开启IE浏览器对本地JavaScript的支持;
c.应用注释符号验证浏览器是否支持JavaScript脚本功能;
d.应用标记验证浏览器是否支持JavaScript脚本。
10.在php中,单引号和双引号的处理机制是不同的,他们的区别:
双引号的内容可以被解释和替换,而单引号的北荣则被作为普通字符进行处理。如:
复制代码 代码如下:
$test="PHP";
$str1="I like $test";
$str2='I like $test';
echo $str; //输出:I like PHP;
echo $str; //输出:I like $test;
?>
condb.php
$con = mysql_connect("localhost","root","123456");
if (!$con) {
die("Query is failed :" . mysql_error());
}
mysql_select_db("login_schema");
mysql_query("set names 'utf8'");
?>
login.php
session_start();
if (isset($_SESSION['errorMsg']) && $_SESSION['errorStatic'] == 1){
echo "" . $_SESSION['errorMsg'] . "";
}else{
unset($_SESSION['errorStatic']);
}
?>
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