封装的Sqlite3简易操作类

<?php
/*
注意细节:实例化对象时传入的是数据库的路径，要是数据库不存在的话会自动创建。
*/
class sqlite extends SQLite3{
    public $url;
    function __construct($url){
        $this->url=$url;
        $this->open($url);
    }
    function check_input($value){
        if (get_magic_quotes_gpc()) {
            $value = sqlite_escape_string($value);
        }
        return $value;
    }
    function create($table,$name,$type=null){
        $sql = &#39;CREATE TABLE &#39;.$table.&#39;(&#39;;
        if($type==null){
            $arrname = array_keys($name);
            $arrtype = array_values($name);
        }else{
            $arrname = explode("|", $name);
            $arrtype = explode("|", $type);
        }
        for($i=0;$i<count($arrname);$i++){
            if($i==count($arrname)-1){
                $sql = $sql.$arrname[$i]."   ".$arrtype[$i]."";
            }else{
                $sql = $sql.$arrname[$i]."   ".$arrtype[$i].",";
            }
             
        }
        $sql = $sql.&#39;);&#39;;
        $re = $this->query($sql);
        if($re){
            return true;
        }else{
            return fasle;
        }
    }
    function drop($table){
        $sql = &#39;DROP TABLE &#39;.$table.&#39;;&#39;;
        $re = $this->query($sql);
        if($re){
            return true;
        }else{
            return false;
        }
    }
    function insert($table,$name,$value=null){
        $sql = "INSERT INTO ".$table.&#39;(&#39;;
        if($value == null){
        $arrname = array_keys($name);
        $arrvalue = array_values($name);
        }else{
        $arrname = explode(&#39;|&#39;, $name);
        $arrvalue = explode(&#39;|&#39;, $value);
        }
        for($i=0;$i<count($arrname);$i++){
            if($i==count($arrname)-1){
                $sql = $sql.$arrname[$i];
            }else{
                $sql = $sql.$arrname[$i].",";
            }
        }
        $sql = $sql.")VALUES(";
        for($i=0;$i<count($arrvalue);$i++){
            if($i==count($arrvalue)-1){
                $sql = $sql."&#39;".$arrvalue[$i]."&#39;";
            }else{
                $sql = $sql."&#39;".$arrvalue[$i]."&#39;,";
            }
        }
        $sql .=");";
        if($debug){
            echo $sql;
        }
        $re = $this->query($sql);
        if($re){
            return true;
        }else{
            return false;
        }
    }
    function delete($table,$Conditionsname,$Conditionsvalue=null){
        if($Conditionsvalue!=null){
            $sql = "DELETE FROM ".$table." WHERE ".$Conditionsname."=&#39;".$Conditionsvalue."&#39;;";
        }else{
            $sql = "DELETE FROM ".$table." WHERE ";
            $arrname = array_keys($Conditionsname);
            $arrvalue = array_values($Conditionsname);
            for($i=0;$i<count($arrname);$i++){
                if($i==count($arrname)-1){
                    $sql.=$arrname[$i].&#39;=&#39;."&#39;".$arrvalue[$i]."&#39;";
                }else{
                    $sql.=$arrname[$i].&#39;=&#39;."&#39;".$arrvalue[$i]."&#39;,";
                }
            }
            $sql.=&#39;;&#39;;
        }
        $re = $this->query($sql);
        if($re){
            return true;
        }else{
            return false;
        }
    }
    function select($table,$name,$Conditionsname,$Conditionsvalue=null){
        if($Conditionsvalue!=null){
            $sql = "SELECT ".$name." FROM ".$table." WHERE ".$Conditionsname."=&#39;".$Conditionsvalue."&#39;;";
        }else{
            $sql = "SELECT ".$name." FROM ".$table." WHERE ";
            $arrname = array_keys($Conditionsname);
            $arrvalue = array_values($Conditionsname);
            for($i=0;$i<count($arrname);$i++){
                if($i==count($arrname)-1){
                    $sql.=$arrname[$i].&#39;=&#39;."&#39;".$arrvalue[$i]."&#39;";
                }else{
                    $sql.=$arrname[$i].&#39;=&#39;."&#39;".$arrvalue[$i]."&#39; and ";
                }
            }
            $sql.=&#39;;&#39;;
        }
        $ret = $this->query($sql);
        $row = $ret->fetchArray(SQLITE3_ASSOC);
        return $row[$name];
    }
    function update($table,$name,$value,$Conditionsname,$Conditionsvalue=null){
        if($Conditionsvalue!=null){
            $sql = "UPDATE ".$table." SET ".$name."= &#39;".$value."&#39; WHERE ".
            $Conditionsname."=&#39;".$Conditionsvalue."&#39;;";
        }else{
            $sql = "UPDATE ".$table." SET ".$name."= &#39;".$value."&#39; WHERE ";
            $arrname = array_keys($Conditionsname);
            $arrvalue = array_values($Conditionsname);
            for($i=0;$i<count($arrname);$i++){
                if($i==count($arrname)-1){
                    $sql.=$arrname[$i].&#39;=&#39;."&#39;".$arrvalue[$i]."&#39;";
                }else{
                    $sql.=$arrname[$i].&#39;=&#39;."&#39;".$arrvalue[$i]."&#39; and ";
                }
            }
            $sql.=&#39;;&#39;;
        }
        $re = $this->query($sql);
        if($re){
            return true;
        }else{
            return false; 
        }
    }
    function group($table,$name){
        $sql = "SELECT ".$name." FROM ".$table.";";
        $return = array();
        $ret = $this->query($sql);
        while($row = $ret->fetchArray(SQLITE3_ASSOC) ){
            array_push($return, $row[$name]);
        }
        return $return;
    }
    function fecthall($sql){
        $return = array();
        $ret = $this->query($sql);
        while($row = $ret->fetchArray(SQLITE3_ASSOC) ){
            array_push($return, $row);
        }
        return $return;
    }
}