Briefly describe the classes for php to operate mysql database

This article mainly introduces the classes for PHP to operate mysql database, involving basic operation methods such as connection, query, insertion, and deletion of PHP to operate mysql. It is of great practical value. Friends who need it can refer to it

The example in this article describes the class of PHP operating mysql database. Share it with everyone for your reference. The details are as follows:

<?php
/**
 * Database class
 *
 * @version: 2.2
 * @revised: 27 may 2007
 *
 **/
class Database {
 var $host;
 var $name;
 var $user;
 var $pass;
 var $prefix;
 var $linkId;
 function Database($mysql) {
  foreach($mysql as $k => $v){
   $this->$k = $v;
  }
  if(strlen($this->prefix)>0 && substr($this->prefix, -1) !== "_")
  $prefix .= "_";
  $this->prefix = $prefix;
 }
 function getLastID() {
  $id = mysql_fetch_row(mysql_query("SELECT LAST_INSERT_ID()", $this->linkId));
  return $id[0];
 }
 function getPossibleValues($tableA, $whereA) {
  if(gettype($tableA) == "array") {
   $table = "";
   foreach($tableA as $t) {
    $table .= $this->prefix.$t.", ";
   }
   $table = substr($table, 0, -2);
  } else $table = $this->prefix.$tableA;
  if(gettype($whereA) != "array") {
   $whereA = array($whereA);
  }
  $return = array();
  foreach($whereA as $where) {
   $sql = mysql_query("SHOW COLUMNS FROM ".$table." LIKE &#39;%".$where."%&#39;");
   while($arr = mysql_fetch_array($sql)) {
    if(strpos($arr[&#39;Type&#39;], &#39;enum&#39;)===0) {
     $vals = substr($arr[&#39;Type&#39;], 5, -1);
    } else {
     $vals = substr($arr[&#39;Type&#39;], 4, -1);
    }
    $vals = str_replace("&#39;","",$vals);
    $vals = explode(",",$vals);
    $i = 1;
    foreach($vals as $val) {
     $return[$arr[&#39;Field&#39;]][$i++] = $val;
    }
    $return[$arr[&#39;Field&#39;]][&#39;default&#39;] = $arr[&#39;Default&#39;];
    if($arr[&#39;Null&#39;] != "NO") $return[$arr[&#39;Field&#39;]][0] = NULL;
   }
  }
  return $return;
 }
 function connect() {
  $this->linkId = mysql_connect($this->host, $this->user, $this->pass);
  if(!$this->linkId) {
   return false;
  }
  if(mysql_select_db($this->name, $this->linkId)) return true;
  mysql_close($this->linkId);
  return false;
 }
 function runSelect($tables, $where = "1", $fieldsA = "*", $order = false, $limit = false, $offset = false, $group = false) {
  if(gettype($tables) == "array") {
   $table = "";
   foreach($tables as $t) {
    $table .= $this->prefix.$t.", ";
   }
   $table = substr($table, 0, -2);
  } else $table = $this->prefix.$tables;
  if(gettype($fieldsA) == "array") {
   $fields = "";
   $keys = array_keys($fieldsA);
   if($keys[0] != &#39;0&#39;) {
    foreach($keys as $key) {
     $fields .= $key.&#39; AS &#39;.$fieldsA[$key].&#39;, &#39;;
    }
   } else {
    foreach($fieldsA as $field) {
     $fields .= $field.&#39;, &#39;;
    }
   }
   $fields = substr($fields, 0, -2);
  } else $fields = $fieldsA;
  $query = "SELECT ".$fields." FROM ".$table." WHERE ".$where.
   ($order!== false?" ORDER BY ".$order:($group!==false ? " GROUP BY ".$group : "")).
   ($limit !== false?" LIMIT ".$limit:"").
   ($offset !== false?" OFFSET ".$offset:"");
  return mysql_query($query, $this->linkId);
 }
 function runUpdate($table, $valuesA, $where = "1") {
  if(gettype($valuesA) == "array") {
   $fields = "";
   $values = "";
   $keys = array_keys($valuesA);
   foreach($keys as $key) {
    if($valuesA[$key] !== NULL)
     $values .= "`".$key."`=&#39;".str_replace("&#39;",&#39;\&#39;&#39;, $valuesA[$key])."&#39;,";
    else
     $values .= $key."=NULL,";
   }
   $fields = substr($fields, 0, -1);
   $values = substr($values, 0, -1);
  } else $values = $valuesA;
  $query = "UPDATE ".$this->prefix.$table." SET ".$values." WHERE ".$where;
  if(mysql_query($query,
    $this->linkId))
   return mysql_affected_rows($this->linkId);
  return false;
 }
 function runDelete($table, $where = "1") {
  if(mysql_query("DELETE FROM ".$this->prefix.$table." WHERE ".$where, $this->linkId))
   return mysql_affected_rows($this->linkId);
  return false;
 }
 function runInsert($table, $valuesA, $onDuplicate = NULL) {
  if(gettype($valuesA) == "array") {
   $fields = "";
   $values = "";
   $keys = array_keys($valuesA);
   foreach($keys as $key) {
    $fields .= "`".$key."`, ";
    $values .= ($valuesA[$key]===NULL?"NULL, ":"&#39;".str_replace("&#39;", &#39;\&#39;&#39;, $valuesA[$key])."&#39;, ");
   }
   $fields = substr($fields, 0, -2);
   $values = substr($values, 0, -2);
  }
  $onDup = "";
  if($onDuplicate != NULL) {
   $onDup = " ON DUPLICATE KEY UPDATE ";
   if(gettype($onDuplicate) == "array") {
    $keys = array_keys($onDuplicate);
    foreach($keys as $key) {
     $onDup .= &#39;`&#39;.$key.&#39;`=&#39;.($onDuplicate[$key]===NULL?"NULL,":"&#39;".str_replace("&#39;", &#39;\&#39;&#39;, $onDuplicate[$key])."&#39;, ");
    }
    $onDup = substr($onDup, 0, -2);
   } else $onDup .= $onDuplicate;
  }
  $query = "INSERT INTO ".$this->prefix.$table.($fields!==NULL?"(".$fields.")":"").
   " VALUES (".$values.")".$onDup;
  if(mysql_query($query, $this->linkId))
   return mysql_affected_rows($this->linkId);
  return false;
 }
 function getCells($table){
  $query = "SHOW COLUMNS FROM `".$table."`";
  $fields = mysql_query($query, $this->linkId) or die(&#39;hej&#39;);
  return $fields;
 }
 function translateCellName($cellName){
  $sql = $this->runSelect("mysql_cell_translation","mysql_name = &#39;".$cellName."&#39;");
  $row = mysql_fetch_assoc($sql);
  return $row[&#39;human_name&#39;]?$row[&#39;human_name&#39;]:&#39;<span class="faded">[&#39;.$cellName.&#39;]</span>&#39;;
 }
 function getError() {
  return mysql_error($this->linkId);
 }
 function close()
 {
  mysql_close($this->linkId);
 }
}
?>

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