php简单操作mysql数据库的类_PHP教程

php简单操作mysql数据库的类

 具体如下：

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/** * 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 '%".$where."%'"); while($arr = mysql_fetch_array($sql)) { if(strpos($arr['Type'], 'enum')===0) { $vals = substr($arr['Type'], 5, -1); } else { $vals = substr($arr['Type'], 4, -1); } $vals = str_replace("'","",$vals); $vals = explode(",",$vals); $i = 1; foreach($vals as $val) { $return[$arr['Field']][$i++] = $val; } $return[$arr['Field']]['default'] = $arr['Default']; if($arr['Null'] != "NO") $return[$arr['Field']][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($keys[0] != '0') { foreach($keys as $key) { $fields .= $key.' AS '.$fieldsA[$key].', '; } } else { foreach($fieldsA as $field) { $fields .= $field.', '; } } $fields = substr($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."`='".str_replace("'",'\'', $valuesA[$key])."',"; 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, ":"'".str_replace("'", '\'', $valuesA[$key])."', "); } $fields = substr($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) { $onDup .= '`'.$key.'`='.($onDuplicate[$key]===NULL?"NULL,":"'".str_replace("'", '\'', $onDuplicate[$key])."', "); } $onDup = substr($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('hej'); return $fields; } function translateCellName($cellName){ $sql = $this->runSelect("mysql_cell_translation","mysql_name = '".$cellName."'"); $row = mysql_fetch_assoc($sql); return $row['human_name']?$row['human_name']:'['.$cellName.']'; } function getError() { return mysql_error($this->linkId); } function close() { mysql_close($this->linkId); } } ?>

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