PHP前端后端表单数据验证(一)

class Class_Check{
    var $fields; //所有可能的输出域
    function Class_Check($fields){
        $this->fields=$fields;
    }


    var $formFields;  //本表单的输出域

    function reset(){
        $this->formFields=array();
    }

    function formSubmit(){
        $ret="onsubmit='";
        foreach($this->formFields as $name=>$key){
            $reg=$this->fields[$key][0];
            $name="check_".$key."_".$name;
            $ret.="ele=document.getElementById(\"$name\");";
            $ret.="if(!new RegExp(/^$reg$/).test(ele.value)){";
            $ret.=" ele.onblur();";
            $ret.=" ele.focus();";
            $ret.=" return false;";
            $ret.="}";
        }
        $ret.="' ";

        return $ret;
    }

    function output($key,$name,$default='',$class=''){
        $this->formFields[$name]=$key;

        $reg=$this->fields[$key][0];
        $msg=$this->fields[$key][1];
        $name="check_".$key."_".$name;
        $msgName=$name."_msg";

        $output=";
        if($default)$output.=" value='$delete' ";
        if($class)$output.=" class='$class' ";
        $output.=" onblur='document.getElementById(\"$msgName\").innerHTML=(new RegExp(/^$reg$/).test(this.value) == false)?\"$msg\":\"\";' ";
        $output.=" />";
        $output.=" ";
        return $output;
    }

    function valid($trans){
        if(!$_POST) return false;
        $ret=array();
        foreach($_POST as $postKey=>$value){
            if(substr($postKey,0,6)!='check_')continue;
            list($null,$key,$name)=explode('_',$postKey);

            $reg=$this->fields[$key][0];
            $msg=$this->fields[$key][1];
            if(!preg_match("/^".$reg."$/",$value)){
                if(isset($trans[$name]))
                $ret[$trans[$name]]=$msg;
                else
                $ret[$name]=$msg;
            }
        }
        if(count($ret)==0)return true;
        return $ret;
    }
}
?>