----- 022-mysql.php -----
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta http-equiv="content-type" content="text/html; charset=utf-8"> 5 <title>MySQL</title> 6 </head> 7 <body> 8 <h2>MySQL</h2> 9 <pre style="font-family:微软雅黑; font-size:14pt"> 10 <?php 11 //绝对路径！绝对路径！绝对路径！ 12 $con = @mysql_connect("localhost", "root", "root") or die("无法连接数据库"); 13 mysql_select_db("world", $con); 14 $sql = "SELECT code, name, population FROM country ORDER BY population DESC LIMIT 5"; 15 $result = mysql_query($sql, $con); 16 echo "查询到的资源：", $result, "\n"; 17 echo "查询到的结果数：", @mysql_numrows($result), "\n"; 18 echo "第三行的数据：", mysql_result($result, 0, "code"), " ", mysql_result($result, 0, "name"), " ", mysql_result($result, 0, "population"), "\n"; 19 20 mysql_data_seek($result, 0); //指针归位 21 echo "<b>mysql_fetch_row查询数据：</b>", "\n"; 22 while(list($a, $b, $c) = mysql_fetch_row($result)){ 23 echo $a, "---", $b, "---", $c, "\n"; 24 } 25 26 mysql_data_seek($result, 0); //指针归位 27 echo "<b>mysql_fetch_assoc查询数据：</b>", "\n"; 28 while($s = mysql_fetch_assoc($result)){ 29 var_export($s); 30 } 31 echo "\n"; 32 33 mysql_data_seek($result, 0); //指针归位 34 echo "<b>mysql_fetch_array查询数据：</b>", "\n"; 35 while($s = mysql_fetch_array($result, MYSQL_NUM)){ 36 echo $s[0], " ", $s[1], " ", $s[2]/100000000, "亿\n"; 37 } 38 39 mysql_data_seek($result, 0); //指针归位 40 echo "<b>mysql_fetch_object查询数据：</b>", "\n"; 41 while($s = mysql_fetch_object($result)){ 42 foreach($s as $key=>$value){ 43 printf("%s=>%-15s ", $key, $value); 44 //echo $key, "=>", $value, "\t"; 45 } 46 echo "\n"; 47 } 48 echo "错误信息：", var_export(mysql_error()), "\n"; 49 echo "错误代码：", mysql_errno(), "\n"; 50 ?> 51 </pre> 52 </body> 53 </html>
