Php应用实例－－分页的技巧

一，三个函数，一个观念：函数都有输入输出。
１，获取资料表的函数GetRows()：
function GetRows( $Database, $Query ) {
   mysql_connect ("ftp", "root", "");
   $db = mysql_select_db( $Database );
   if ( ! $db ) {
      echo "礚猭秨币 kjsql 戈?畐?叫絋﹚眤?竒?ミ kjsql 戈?畐!";
      exit;
   }

   $rows = mysql_query( $Query );
   if ( ! $rows ) {
      echo "SQL ??岿粇?礚猭匡?戈?!";
      exit;
   }
   return $rows;
}
?>
$rows是函数的输出，作为存取资料的依据。
２，连结数据库的函数ConnectDatabase():
 function ConnectDatabase( $Database ) {
   mysql_connect ("ftp", "root", "");
   $db = mysql_select_db( $Database );
   if ( ! $db ) {
      echo "礚猭秨币 kjsql 戈?畐?叫絋﹚眤?竒?ミ kjsql 戈?畐!";
      exit;
   }
}
?>
３，显示一页的函数ShowOnePage():
function ShowOnePage( $rows, $No ) {
  mysql_data_seek( $rows, $No );

  echo "

";
  echo "";
  while ( $field = mysql_fetch_field($rows) ) {
     echo "";
  }
  echo "";

  for ( $I=1; $I <= 10; $I++ ) {
     if ( $row = mysql_fetch_row($rows) ) {
        echo "

";
        for ( $K=0 ; $K < count($row); $K++ ) {
           echo "";
        }
        echo "";
     }
  }
  echo "

No.	" . $field->name . "
" . ($No + $I) . "	" . $row[$K] . "

";
}
?>
输出为一张表格。

二，分页的技巧
Version１，只显示１到１０条记录：
function ShowOnePage( $rows, $No ) {
  mysql_data_seek( $rows, $No );

  echo "

";
  echo "";
  while ( $field = mysql_fetch_field($rows) ) {
     echo "";
  }
  echo "";

  for ( $I=1; $I <= 10; $I++ ) {
     if ( $row = mysql_fetch_row($rows) ) {
        echo "

";
        for ( $K=0 ; $K < count($row); $K++ ) {
           echo "";
        }
        echo "";
     }
  }
  echo "

No.	" . $field->name . "
" . ($No + $I) . "	" . $row[$K] . "

";
}
?>

pagev1.php3, Version 1 - だ??мォ

---

  include("../db.func");
  $rows = GetRows( "kjsql", "Select * From stock" );

  ShowOnePage( $rows, 0 );
?>

---

相关说明：1,$No参数，由于显示某一页，利用此参数指定该页的第一笔资料；
　　　　　2,设定目前资料录的位子：mysql_data_seek($rows,$No);
          3,判断是否还有资料录：if ($row=mysql_fetch_row($rows)).

Version2，可以在IE位置栏输入页次：
function ShowOnePage( $rows, $No ) {
  mysql_data_seek( $rows, $No );

  echo "

";
  echo "";
  while ( $field = mysql_fetch_field($rows) ) {
     echo "";
  }
  echo "";

  for ( $I=1; $I <= 10; $I++ ) {
     if ( $row = mysql_fetch_row($rows) ) {
        echo "

";
        for ( $K=0 ; $K < count($row); $K++ ) {
           echo "";
        }
        echo "";
     }
  }
  echo "

No.	" . $field->name . "
" . ($No + $I) . "	" . $row[$K] . "

";
}
?>

pagev2.php3, Version 2 - だ??мォ

---

  include("../db.func");
  $rows = GetRows( "kjsql", "Select * From stock" );

  $num = mysql_num_rows($rows);
  $Pages = intval(($num - 1) / 10) + 1;

  if ( $Page < 1 ) $Page = 1;
  if ( $Page > $Pages ) $Page = $Pages;

  ShowOnePage( $rows, ($Page-1)*10 );
?>

---

?Ω:/

Version３，页次的浏览：
function ShowOnePage( $rows, $No ) {
  mysql_data_seek( $rows, $No );

  echo "

";
  echo "";
  while ( $field = mysql_fetch_field($rows) ) {
     echo "";
  }
  echo "";

  for ( $I=1; $I <= 10; $I++ ) {
     if ( $row = mysql_fetch_row($rows) ) {
        echo "

";
        for ( $K=0 ; $K < count($row); $K++ ) {
           echo "";
        }
        echo "";
     }
  }
  echo "

No.	" . $field->name . "
" . ($No + $I) . "	" . $row[$K] . "

";
}
?>

pagev3.php3, Version 3 - ?Ω?聅凝

---

  include("../db.func");
  $rows = GetRows( "kjsql", "Select * From stock" );

  $num = mysql_num_rows($rows);
  $Pages = intval(($num - 1) / 10) + 1;

  if ( $Page < 1 ) $Page = 1;
  if ( $Page > $Pages ) $Page = $Pages;

  ShowOnePage( $rows, ($Page-1)*10 );
?>

---

if ( $Page <> 1 ) {  // ?狦ぃ琌??材??
   echo "材???";
   echo "????";
}

if ( $Page <> $Pages ) {  // ?狦ぃ琌??程???
   echo "????";
   echo "程????";
}
?>
?Ω:/

Version 4，完成版：
function ShowOnePage( $rows, $No ) {
  mysql_data_seek( $rows, $No );

  echo "

";
  echo "";
  while ( $field = mysql_fetch_field($rows) ) {
     echo "";
  }
  echo "";

  for ( $I=1; $I <= 10; $I++ ) {
     if ( $row = mysql_fetch_row($rows) ) {
        echo "

";
        for ( $K=0 ; $K < count($row); $K++ ) {
           echo "";
        }
        echo "";
     }
  }
  echo "

No.	" . $field->name . "
" . ($No + $I) . "	" . $row[$K] . "

";
}
?>

pagev4.php3, だ?聅凝(ЧΘ?)

---

  include("../db.func");
  $rows = GetRows( "kjsql", "Select * From stock" );

  $num = mysql_num_rows($rows);
  $Pages = intval(($num - 1) / 10) + 1;

  if ( $Page < 1 ) $Page = 1;
  if ( $Page > $Pages ) $Page = $Pages;

  ShowOnePage( $rows, ($Page-1)*10 );
?>

---

Method=GET>

if ( $Page <> 1 ) {  // ?狦ぃ琌??材??
   echo "材???";
   echo "????";
}

if ( $Page <> $Pages ) {  // ?狦ぃ琌??程???
   echo "????";
   echo "程????";
}
?>
块??Ω:
?Ω:/

作者：（台湾）王国荣