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操作系统：Fedora 21
PHP版本：最新的5.6.9
开发工具：gedit
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本帖负责收集笔记。
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<?php
include_once("conn.php");
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>PDO Learning</title>
</head>
<body>
<?php
?>
</body>
</html>
最基本的HTML5页面代码，好难记。。。
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回复：3楼 不过也比HTML4好记多了。 HTML4一上来就是： <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns=" http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> |
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首先，连接数据库。
$db = new PDO("mysql:host=localhost;dbname=test", "php", "it");
密码先填写一个错误的，提示：
Fatal error: Uncaught exception 'PDOException' with message
'SQLSTATE[HY000] [1045] Access denied for user 'php'@'localhost' (using
password: YES)' in /var/www/html/temp/11330/conn.php:4
Stack trace:
#0 /var/www/html/temp/11330/conn.php(4):
PDO->__construct('mysql:host=loca...', 'php', 'it')
#1 /var/www/html/temp/11330/index.php(2):
include_once('/var/www/html/t...')
#2 {main}
thrown in /var/www/html/temp/11330/conn.php on line 4
所以必须要加try-catch块来处理这个错误
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function display_exception($msg) {
echo $msg;
}
set_exception_handler("display_exception");
$db = new PDO("mysql:host=localhost;dbname=test", "php", "it");
exception 'PDOException' with message 'SQLSTATE[HY000] [1045] Access
denied for user 'php'@'localhost' (using password: YES)' in
/var/www/html/temp/11330/conn.php:8
Stack trace:
#0 /var/www/html/temp/11330/conn.php(8):
PDO->__construct('mysql:host=loca...', 'php', 'it')
#1 /var/www/html/temp/11330/index.php(2):
include_once('/var/www/html/t...')
#2 {main}
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try {
$db = new PDO("mysql:host=localhost;dbname=test", "php", "it");
} catch (PDOException $e) {
echo $e->getMessage();
}
SQLSTATE[HY000] [1045] Access denied for user 'php'@'localhost' (using password: YES)
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try {
$db = new PDO("mysql:host=localhost;dbname=test", "php", "it");
} catch (PDOException $e) {
trigger_error("Failed connecting to the database server.", E_USER_ERROR);
}
Fatal error: Failed connecting to the database server. in /var/www/html/temp/11330/conn.php on line 7
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10樓 張樹人
2015-5-30 19:39
回复：3楼
标准的写法是“<!DOCTYPE html>”
“DOCTYPE”是大写
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