php implements mysql database operation class sharing

<?php
/*
 Database operation class 
*/
class Mysql{
 private $LocalHost = 'localhost';
 private $LoaclUser = 'root';
 private $LocalPass = '123456';
 private $LocalBase = 'jiangxibaiyi';
 private $LocalCode = 'UTF8';
 private $PreFix;
 private $Conn;
 private $Start     = 0;
 private $Error     = false; // Database connection status , false Not connected or not connected properly 
 public  $Err       = true;  //Sql The execution result 

 private $Table;
 private $Field     = '*';
 private $Where     = '';
 private $Order     = '';

 private $PageSize  = 0; // Paging display -> How many pieces per page, 0 For non-paging display 
 private $PageCount = 1; // Paging display -> How many are there altogether 
 private $PageNum   = 1; // Paging display -> How many pages are there altogether 
 private $PageNo    = 1; // Paging display -> Current page 
 private $PageKey   = 'page'; // paging url The parameters of the key 
 private $PageStart = 0; // Paging display -> Which line is currently returned from 

 
 private $Select;
 private $Rest;

 private $Result    = false;// The result set 

 public $FormArray = array();

 public $Instr_ID  = 0;
 private $j =  0;

 
 public function Parameter($Loca, $Root, $Pass, $Base, $Code, $PreFix = ''){
  $this->LoaclUser = $Root;
  $this->LocalBase = $Base;
  $this->LocalCode = $Code;
  $this->LocalHost = $Loca;
  $this->LocalPass = $Pass;
  $this->PreFix    = $PreFix;
  return $this;
 }
 private function Connection( $Sql ){
  !function_exists(mysqli_connect) ? die(' The query failed and could not be loaded mysqli extension ') : null;
  $this->Conn = @new mysqli( $this->LocalHost, $this->LoaclUser, $this->LocalPass, $this->LocalBase);
  $this->Error = mysqli_connect_errno() == 0 ? true : false;
  !$this->Error ? die(' Database connection error, check database connection parameters ') : null;
  $this->Conn->query('SET NAMES ' . $this->LocalCode);
  $this->Rest = $this->Conn->query($Sql);
  $this->Err  = mysqli_error($this->Conn);
  $this->Instr_ID = mysqli_insert_id($this->Conn);
  $this->Rest->free_result;
  $this->Conn->close;
  $this -> FormArray = '';
  return $this;
 }

 public function null(){
  $this->PageSize  = 0;
  //$this->PageCount = 1;
  $this->PageStart = 1;
  $this->Field     = ' * ';
     $this->Select    = '';
  unset($this->Table, $this->Where,$this->Order, $this->Result);
 }

 public function Table( $TableName ) {// The data table 
   $this -> null();
   $this->Table = '`' . $this->PreFix . $TableName . '`';
   return $this;
 }

 public function Field( $Array = '*' ) {// The data fields 
   !empty( $this->Field ) ? $this->Field = '' : null;
   $Array = explode(',', $Array);
   foreach ( $Array as $field ) {
   $this->Field .= !$this->Start ? '`' . $field . '`' :  ', `' . $field . '`';
   $this->Start++;
   }
   $this->Start = 0;
   return $this;
 }

 public function Where( $Where ) {// conditions 
       $this->Where = ' where ' .$Where;
    return $this; 
 }

 public function Order( $Order ) {// The sorting 
   $this->Order = ' order by ' . $Order;
   return $this;
 }

 public function pk( $key ) {// paging url The parameters of the key 
   $this->PageKey = $key;
   return $this;
 }

 public function Page( $PageSize ) {// paging 
   $this->PageSize = $PageSize;
   $this->PageNo   = $this->get( $this->PageKey );
   $this->PageNo   = empty( $this->PageNo ) || !isset( $this->PageNo ) || !is_numeric( $this->PageNo ) || $this->PageNo < 1 ? 1 : $this->PageNo;
   return $this;
 }

 public function post( $Key, $Filter = true ){
  return $Filter ? strip_tags($_POST[$Key]) : $_POST[$Key];
 }

 public function get( $Key, $Filter = true ){
  return $Filter ? strip_tags($_GET[$Key]) : $_GET[$Key];
 }

 public function Sel(){
  $this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
  $this->Connection( $this->Select );
  if ( $this->Rest->num_rows ) {
   while ( $Rs = $this->Rest->fetch_assoc() ) {
     $this->Result[] = $Rs;
    }
  }
    $DataBase = $this->Result;
    return empty($DataBase) ? false : $DataBase;
 }

 public function querys( $Sql = '', $Type = 'not', $biao = false ) {
  $this->Select = $Sql;
  $this->Connection( $this->Select );
  if ( $this->Rest->num_rows ) {
     if ( !$biao ) {
   while ( $Rs = $this->Rest->fetch_array() ) {
     $this->Result[] = !preg_match('/^\d+$/i', $Type) ?  $Rs : $Rs[ $Type ];
    }
  } else {
   while ( $Rs = $this->Rest->fetch_assoc() ) {
     $this->Result[] = $Rs;
    }
  }
  }
    $DataBase = $this->Result;
    return empty($DataBase) ? false : $DataBase;

 }

 public function executes( $Sql = '' ){
  $this->Connection( $Sql  );
  return $this->Rest;
 }

 
 public function exists( $T = '', $F = '', $W = ''){
  if ( empty( $F ) ) { return 0; }
  $cmd = empty( $W ) ? 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'`' : 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'` Where ' . $W;
        $this->Connection( $cmd );
  unset( $T, $F, $W, $cmd );
  $Rel =  $this->Rest->fetch_array();
  return round( $Rel['baiyinum'], 2 );
 }

 
 public function ExistsTo( $Bili = 10000, $T = '', $F = '', $W = ''){
  if ( empty( $F ) ) { return 0; }
  $cmd = empty( $W ) ? 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'`' : 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'` Where ' . $W;
        $this->Connection( $cmd );
  unset( $T, $F, $W, $cmd );
  $Rel =  $this->Rest->fetch_array();
  return round( $Rel['baiyinum'] * $Bili );
 }

 
 public function Select( $Type = true, $ListNum = 1 ){ // Returns a record (in array form,   Return number of bars) 
   $this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
   if ( is_numeric( $ListNum ) ) { 
  if ( $this->PageSize > 0 ) {
   $this->Connection( $this->Select );// Execute the query 
   $this->PageCount =  $this->Rest->num_rows;// Total number of records obtained 
   $this->PageNum   =  ceil($this->PageCount / $this->PageSize); // How many pages are there altogether 
   $this->PageNo    = $this->PageNo > $this->PageNum ? $this->PageNum : $this->PageNo;
   $this->PageStart = ( $this->PageNo - 1 ) * $this->PageSize;   // Which line is currently returned from 
   $this->Select   .= ' limit ' . $this->PageStart . ', ' .$this->PageSize; // To reconstruct sql statements 
  } else {
   $this->Select   .= ' limit ' . $ListNum; // To reconstruct sql statements 
  }
   } else {
   $this->Select   .= ' limit 1'; // To reconstruct sql statements 
   }
   //echo $this->Select;
   $this->Connection( $this->Select );// Execute the query again 
   if ( $this->Rest->num_rows ) {// If the record exists 
  if ( $Type ) {
    while ( $Rs = $this->Rest->fetch_array() ) {
     $this->Result[] = $Rs;
    }
  }else{
    while ( $Rs = $this->Rest->fetch_assoc() ) {
     $this->Result[] = $Rs;
    }
  }
   }
   if ( ( $ListNum == 1 or !is_numeric( $ListNum ) ) && !$this->PageSize) { $this->Result = $this->Result[0]; }
   $DataBase = $this->Result;
   return empty($DataBase) ? false : $DataBase;
 }

   public function Num() { // Return total number of records 
     $this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
  $this->Connection( $this->Select );// Execute the query 
  return $this->Rest->num_rows;// Total number of records obtained 
   }

   public function PageNav($NumNav = false ) {  // paging 
  $Action = $this -> get('action');
  !empty( $Action ) or $Action =  'index';
  $Module = $this -> get('module');
  !empty( $Module ) or $Module = 'index';
  $NavUrl   = '/' . $Module . '/' . $Action . '/' . $this -> PageKey .'/';
  $NaIndex  = '/' . $Module . '/' . $Action;
  $PageHtml = "\n<div class=\"pagenav\">";
  $PageHtml .= '<span>' . $this->PageCount . ' records         ' . $this->PageNo . '/' . $this->PageNum . ' page </span>            ';
  $this->PageNo <= 1 or $PageHtml .= "<a href=\"" . $NaIndex . "\"> Home page </a>\n<a href=\"" .  $NavUrl . ($this->PageNo - 1) . "\"> on 1 page </a>\n";
 if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
 $this->PageNo >= $this->PageNum or $PageHtml .= "<a href=\"" . $NavUrl. ($this->PageNo + 1) .  "\"> Under the 1 page </a>\n<a href=\"" . $NavUrl . $this->PageNum . "\"> back </a>\n";
 $PageHtml .= "</div>\n";
 return  $PageHtml; 
   }

   private function NumPage( $Can = '' ) { // Digital paging 
    $NumHtml = '';
    $First   = 1;
    $Last    = $this->PageNum;
    if ( $this->PageNum > 5 ) {
     if ( $this->PageNo < $this->PageNum ) {
     $First = $this->PageNo - 2;
     $Last  = $this->PageNo + 2;
     }else{
     $First = $this->PageNo - 4;
     $Last  = $this->PageNum;
     }
    }
    if ( $First < 1 ) { $First   = 1; $Last = $First + 4;}
    if ( $Last  > $this->PageNum ) { $First   = $this->PageNum - 4; $Last = $this->PageNum;}
    for( $i = $First; $i <= $Last; $i++) {
     $NumHtml .= $this->PageNo != $i ? "\n\t" . '<a href="' . $Can . $i . '">' . $i . '</a>' . "\n\t" : "\n\t" .'<a class="hover" disabled="disabled">' . $i . '</a>' . "\n\t";
    }
    unset($Can, $First, $i, $Last);
    return $NumHtml;
   }

   public function UserPage($NumNav = false, $PageName = 'index', $Mulu = 'user' ) {  // Member center page 
     $NavUrl   = '/' . $Mulu . '/' . $PageName . '/' . $this->PageKey . '/';
  $PageHtml = "\n<div class=\"pagenav\">";
  $PageHtml .= '<span>' . $this->PageCount . ' records         ' . $this->PageNo . '/' . $this->PageNum . ' page </span>            ';
  $this->PageNo <= 1 or $PageHtml .= "<a href=\"" . $NavUrl . "1\"> Home page </a>\n<a href=\"" .  $NavUrl . ($this->PageNo - 1) . "\"> on 1 page </a>\n";
 if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
 $this->PageNo >= $this->PageNum or $PageHtml .= "<a href=\"" . $NavUrl. ($this->PageNo + 1) .  "\"> Under the 1 page </a>\n<a href=\"" . $NavUrl . $this->PageNum . "\"> back </a>\n";
 $PageHtml .= "</div><div class=\"clear\"></div>\n";
 return  $PageHtml; 
   }

   
   // Form processing starts 

 // Submit when judging the form 
 public function FormIs( $Keys = 'mm' ) {
  return $_POST[ $Keys ] == 1 ? true : false;
 }

 //post Way to get data 
 public function _post( $Keys = '', $TiHuan = '') {
  $Values = strip_tags( $_POST[ $Keys ] );
  $this->FormArray[$Keys] = empty( $Values ) ? $TiHuan : $Values;
        return  empty( $Values ) ? $TiHuan : $Values;
 }

 //get Method To obtain data 
 public function _get( $Keys = '', $TiHuan = '') {
  $Values = strip_tags( $_GET[ $Keys ] );
        return  empty( $Values ) ? $TiHuan : $Values;
 }

 // Determine if it is a number and not less than 0
 public function IsNum( $Num = 0, $Mesg = ' The parameter must be a number ' ) {
  if ( is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ) {
   return $Num;
  }else{
   die( $Mesg );
  }
 }

 // Determine if it is a number and not less than 0 return True/False
 public function NumBer( $Num = 0) {
   return  is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ? true : false;
 }

 // The data seems to be there 
 public function IsData($Types = true, $memg = ' The data already exists ' ){
  $this->Connection('select ' . $this->Field . ' from ' . $this->Table . $this->Where);
  if ( $Types ){
   $this->Rest->num_rows > 0 ? die( $memg ) : null;
  } else {
   return $this->Rest->num_rows;
  }
 }

 
 // Write to database record 
 public function into( $Mesg = '' ){
  !is_array( $this->FormArray ) ? die( $Mesg ) : null;
  $Sql = 'insert into ' . $this->Table . ' (`';
  $I   = 0;
  foreach ( $this->FormArray as $Key => $Val ){
   $Duan .= !$I ? $Key . '`' : ', `' . $Key . '`';
   if ( is_numeric( $Val ) ){
    $Vals .= !$I ? $Val : ', ' . $Val;
   }else{
    $Vals .= !$I ? '\'' . $Val . '\'' : ', \'' . $Val . '\'';
   }
   $I++;
  }
  $Sql .= $Duan . ') values (' . $Vals . ')';

  //@file_put_contents('1.sql', $Sql, FILE_APPEND);

  $this->Connection( $Sql );
  return !empty( $this->Err ) ? false : true;
 }

   // Writes data as an array 
   public function MsgBox( $Table = '', $Filed = array() ) {
    $this -> Table($Table);
    foreach( $Filed as $Key => $Val ) {
    $this -> FormArray[ $Key ] = $Val; 
    }
   return $this ->  Into(' No data available ');
   }

   // Modify database records 
   public function Edit( $Array = array() ) {
    if ( empty( $Array ) ) { $Array = $this -> FormArray; }
    if ( !is_array( $Array ) || empty( $Array ) ) {
     return false;
    } else {
       $Sql = 'update ' . $this -> Table . ' set ';
    $I   = 0;
    $Sub = '';
    $Huan = array('-' => '[jian]', '+' => '[jia]', '*' => '[cheng]', '/' => '[chu]');
    $Zhan = array('[jian]' => '-', '[jia]' => '+', '[cheng]' => '*', '[chu]' => '/');
    foreach ( $Array as $Files => $Val ) {
     $Val  = !is_numeric( $Val ) && !preg_match('/\`\w+\`\s*(\+|\-|\*|\/)/i', $Val) ? '\'' . $Val . '\'' : $Val;
     foreach ( $Huan as $key => $val ){
      $Val = str_replace($key, $val, $Val);
     }
     $duan = !$I ? '`' . $Files . '` = ' :  ', `' . $Files . '` = ';
     $Sub .= $duan . $Val;
     $I++;
    }
    $Sql .= $Sub . $this -> Where;
    foreach ( $Zhan as $Fan => $Hui ) {
     $Sql = str_replace($Fan, $Hui, $Sql);
    }

    //echo $Sql; die;

    $this -> Connection( $Sql );
    unset( $Array, $duan, $Fan, $Files, $Huan, $Hui, $I, $key, $Sql, $Sub, $Val, $Zhan, $val );
    return !empty( $this -> Err ) ? false : true;
   }
   }

   // Delete database records 
   public function del(){
    $Sql = 'delete from ' . $this->Table . $this->Where;
    $this->Connection( $Sql );
    unset($Sql);
    return !empty( $this->Err ) ? false : true;
   }

   // End of form processing 

   // Page jump 
   public function Msg( $Text = ' Operation is successful ' ) {
    echo '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
    echo '<script type="text/javascript">
  <!--
    alert("' . $Text . '");
 document.location="' . $_SERVER['HTTP_REFERER'] . '";
  //-->   
</script>';
 exit;
   }

   # Gets the current system time 
   public function Times(){
    return str_replace('-', '[jian]', date('Y-m-d H:i:s'));
   }

   # Get the user IP address 
 public function GetIP(){ 
   if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) 
    $ip = getenv("HTTP_CLIENT_IP"); 
  else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) 
    $ip = getenv("HTTP_X_FORWARDED_FOR"); 
  else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) 
    $ip = getenv("REMOTE_ADDR"); 
  else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) 
    $ip = $_SERVER['REMOTE_ADDR']; 
  else 
    $ip = "unknown"; 
   return($ip); 
 } 

   
   // Finally close the database connection 
   public function Close(){
    !is_object( $this -> Conn ) or mysqli_close( $this -> Conn );
   }

}

Usage:
Declare database objects
$Conn = new Mysql;
Load database parameters
$Conn- > Parameter(database server, database user name, database password, database name, database code, database table prefix [empty]);

The above code already loads the class file in and initializes some database connection parameters!

Here are some basic method functions:
1, $Conn - > Table();
Select the datatable, the parameter is the datatable name
2, $Conn - > Field();
Selected field names, separated by commas, return all if this method is not called
3, $Conn - > Where();
Sql Where substatement, filtered by condition
4, $Conn - > Order();
Sql sorting
5, $Conn - > Page(int);
The argument is a positive integer number. If this method is called, the record will be paginated
6, $Conn - > Select(Booleans);
Execute the query, return the query result, if there is, it is a 2-dimensional array, if there is no, return false, parameter can be omitted, such as omitted, default is true, the returned array contains the number element
7, $Conn - > Del();
Delete records
8 and $Conn - > Edit(array());
To modify the record, the parameter is a 1-dimensional array, the array key is the field name, and the array value is the field value
9, $Conn - > Into(array());
Add a record, the argument is a 1-dimensional array, the array key is the field name, and the array value is the field value.

The above methods can be called continuously, such as:

$Rult = $Conn -> Table('user') -> Select(); // Returned by the query user Table of all records 
$Rult = $Conn -> Table('user') -> Page(20) -> Select();// Returned by the query user Table of all records and pagination displayed per page 20 Article;