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<!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" /> <title>第一个php程序</title> </head> <body> <script language="php"> echo ‘Hello World !‘ ; </script> <? echo ‘Hello World !‘ ; ?> <% echo ‘Hello World !‘ ; %> <?php echo "Hello World !" ; //单行注释 echo "<p>" ; /* 多行注释 */ #shell脚本风格注释 $boo = true ; if ($boo == true) { echo ‘变量$boo为真‘ ."<br>" ; } $str = ‘字符串‘ ; echo "$str" ; echo ‘$str‘ ."<br>" ; $arr = array(‘a1‘,‘a2‘,‘a3‘) ; echo "当前文件路径： " .__FILE__ ."<br>" ; //预定义常量 $str1 = $str ; //赋值，使用各自内存 $str2 = & $str1 //引用赋值(相当于另起一名字) ?> <?php function fun1($sum) //定义函数 { return "$sum * $sum = ".$sum * $sum ; } echo fun1(10) ."<br>" ; $con = mysql_connect("localhost","root","newman");//连接MySQL数据库 if (!$con) { die(‘Could not connect: ‘ . mysql_error()); } /* if (mysql_query("CREATE DATABASE my_db",$con)) { //创建数据库 echo "Database created"; } else { echo "Error creating database: " . mysql_error(); } */ mysql_select_db("my_db", $con); //选取数据库 /* $sql = "CREATE TABLE Persons ( personID int NOT NULL AUTO_INCREMENT, PRIMARY KEY(personID), FirstName varchar(15), LastName varchar(15), Age int )"; */ /* mysql_query("INSERT INTO Persons (FirstName, LastName, Age) VALUES (‘Peter‘, ‘Griffin‘, ‘35‘)"); mysql_query("INSERT INTO Persons (FirstName, LastName, Age) VALUES (‘Glenn‘, ‘Quagmire‘, ‘33‘)"); */ $result = mysql_query("SELECT * FROM Persons WHERE FirstName=‘Peter‘"); //$result = mysql_query("SELECT * FROM Persons ORDER BY age"); mysql_query("UPDATE Persons SET Age = ‘36‘ WHERE FirstName = ‘Peter‘ AND LastName = ‘Griffin‘"); //mysql_query("DELETE FROM Persons WHERE LastName=‘Griffin‘"); while($row = mysql_fetch_array($result)) { echo $row[‘FirstName‘] . " " . $row[‘LastName‘] . " " . $row[‘Age‘]; echo "<br />"; } mysql_close($con); ?> </body> </html>
第一次需运行注释内的创建数据库和数据库表，注释掉了向数据库表添加记录代码，以免多次添加。
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原文地址：http://www.cnblogs.com/ht-beyond/p/4299937.html
