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Home Backend Development PHP Tutorial PHP mysql operation program_PHP tutorial

PHP mysql operation program_PHP tutorial

Jul 20, 2016 am 11:11 AM
mysql php 。 No code use share study operate program kind

A good PHP mysql operation class, shared with everyone to learn and use.

The code is as follows Copy code

//Database processing class
class db
{
//Data storage variable after SQL execution;
var $db;
//Read or set the position of the current data
var $position=0;
//Execute the SQL statement and save the result as a db variable;

function sub_sql($str)
{
global $prefix;//Global function, table prefix
return str_replace("dede_",$prefix,$str);
}
function Sql($str)
{
$str=$this->sub_sql($str);
> while($row = mysql_fetch_array($result))
if(empty($str_array))
???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????$str_array= ? ???????????????????????????One bit, if the data is empty, it returns null;
function Get_One()
{
$re=empty($this->db[$this->position])?null:$ this->db[$this->position];
???????????? $this->position=$re?$this->position+1:$this->position;
???????????????????????????????????????????????????????????????????????????????????????????????????
}
//Judge whether the data has been read to the end
function Judge()
{
$re=empty($this->db[$this->position] )?true:false;
????????????? return $re; db);
}
//Update the data in the database, $t is the table name, $v format is the array format, the superscript is the field name, and the subscript is the data; $w is the condition and the superscript is the field The subscript is data, $p is the condition, 0 is the equal sign, 1 is greater than, -1 is less than;
function Set_Updata($t,$v,$w,$p=0)
{
??????? $this->Sql($t);
??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????>$vaule)
If(!is_numeric($key))

????????????????????????????????????????????????????????????? $v_str=htmlspecialchars($key : htmlspecialchars($vaule)."'";
?????????????????????????????????????????????????????????????????????????????????????????????????????0:
????????????????????? $f="=";
????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? break;??????????????? break;
??????????? case -1:
??????????????? $f="<";
??????????????? break;
??????? }
??????? if(!empty($f))
??????? {
??????????? foreach($w as $key=>$vaule)
??????????? {
??????????????? if(!is_numeric($key))
??????????????? {
??????????????????? if(empty($v_str))
??????????????????? {
??????????????????????? $w_str=htmlspecialchars($key).$f.htmlspecialchars($vaule)."'";
??????????????????? }else
??????????????????? {
??????????????????????? $w_str=$w_str.",".htmlspecialchars($key).$f.htmlspecialchars($vaule)."'";
??????????????????? }
??????????????? }
??????????? }
??????? }
??????? $sql="UPDATE ".$t." SET ".$v_str." where ".$w_str;
??????? return $result = mysql_query($sql);
??? }
??? //刪除一數(shù)據(jù)$w為條件上標(biāo)為字段名下標(biāo)為數(shù)據(jù),$p為條件0為等號(hào),1為大于,-1為小于;
??? function Set_Del($t,$w,$p=0)
??? {
??????? $this->sub_sql($t);
??????? $w_str="";
??????? $f="";
??????? switch($p)
??????? {
??????????? case 0:
??????????????? $f="=";
??????????????? break;
??????????? case 1:
??????????????? $f=">";
??????????????? break;
??????????? case -1:
??????????????? $f="<";
??????????????? break;
??????? }
??????? if(!empty($f))
??????? {
??????????? foreach($w as $key=>$vaule)
??????????? {
??????????????? if(!is_numeric($key))
??????????????? {
??????????????????? if(empty($v_str))
??????????????????? {
??????????????????????? $w_str=htmlspecialchars($key).$f.htmlspecialchars($vaule)."'";
??????????????????? }else
??????????????????? {
??????????????????????? $w_str=$w_str.",".htmlspecialchars($key).$f.htmlspecialchars($vaule)."'";
??????????????????? }
??????????????? }
??????????? }
??????? }
??????? $str="DELETE FROM ".$t." WHERE ".$w_str;
??????? return $result = mysql_query($str);
??? }
??? function Add($t,$v)
??? {
??????? $this->sub_sql($t);
??????? $k_str="";
??????? $v_str="";
??????? foreach($v as $key=>$vaule)
??????? {
??????????? if(!is_numeric($key)){
??????????????? if(empty($k_str))
??????????????? {
??????????????????? $k_str=htmlspecialchars($key);
??????????????????? $v_str="'".htmlspecialchars($vaule)."'";
??????????????? }else
??????????????? {
??????????????????? $k_str=$k_str.",".htmlspecialchars($key);
??????????????????? $v_str=$v_str.","."'".htmlspecialchars($vaule)."'";
??????????????? }
??????????? }
??????? }
??????? $str="INSERT INTO ".$t."(".$k_str.")"."value(".$v_str.")";
??????? return $result = mysql_query($str);
??? }
}
?>


www.bkjia.comtruehttp://www.bkjia.com/PHPjc/444651.htmlTechArticle一個(gè)不錯(cuò)的PHP mysql操作類 ,分享給大家學(xué)習(xí)使用。 代碼如下 復(fù)制代碼 ?php //數(shù)據(jù)庫處理類 class db { //SQL執(zhí)行后的數(shù)據(jù)保存變量; var $db; //讀取...
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