本文实例讲述了php表单敏感字符过滤类及其用法。分享给大家供大家参考。具体分析如下: 复制代码 代码如下: /** * 表单生成验证文件 */ $_form = new formHtmlFind(); class formHtmlFind{ /** * 输出表单函数 * $formKey 表单键 * $infoArray 更新时的原始信息数组 */ public function formHtml($array,$infoArray='') { // 检测数组是否存在 if(emptyempty($array))return false; $newform = null; // 信息数组(更新信息) $this->infoArray = !emptyempty($infoArray)?$infoArray:array(); $this->array['class'] = get_class_methods(get_class()); foreach ($array as $key =>$arr) { // 键值转换为纯英文 $key = preg_replace("/[^a-z]/i",'',$key); // 生成表单 $newform .= $this->outputForm($arr,$key); } // 输出表单 return $newform.$this->jsError(); } /** * 生成表单函数 */ private function outputForm($arr,$key) { $value = null; if(emptyempty($arr))return false; // input Type $type = $key; // input NAME $name = trim($arr[0]); // input 初始值 不包含多选,单选类 $value = (!emptyempty($this->infoArray[$name]))? trim($this->infoArray[$name]):trim($arr[1]); $value = emptyempty($this->post[$name])? $value :trim($this->post[$name]); // input Title $title = trim($arr[2]); // 样式 $style = trim($arr[3]); if($key!=="hidden") { $dt = "<dt>{$title}</dt><dd>"; // js错误提示 $dd = "<tt id="J{$name}"></tt></dd>rn"; } return (!preg_match("/checkbox|select|radio/i",$key))? $dt.$this->newInput($type,$name,$value,$style,$title).$dd: $this->formSelect($type,$name,$arr[1],$title,$style); // 多选类 } /** * 提交数据检测 */ public function postForm($array) { // 检测数组是否存在 if(emptyempty($array)||emptyempty($_POST))return false; $this->post = $_POST; $this->array['class'] = get_class_methods(get_class()); foreach ($array as $key =>$arr) { // 键值转换为纯英文 $key = preg_replace("/[^a-z]/i",'',$key); // 检测 注销file类表单 if (!emptyempty($arr)&&'file' != $key)$newData[trim($arr[0])] = $this->postFind($arr,$key); } // 输出表单 if(!emptyempty($this->error)) { return false; } else return $newData; } /** * 生成表单 */ private function newInput($type,$name,$value,$style,$title) { switch ($type) { case 'text': // 单行文本 return "<input type="text" name="{$name}" value="{$value}" {$style}/>"; break; case 'password': //密码输入 return "<input type="password" name="{$name}" {$style}/>"; break; case '': //多行文本 return "<textarea name="{$name}" {$style}/>{$value}</textarea>"; break; case 'hidden': // 隐藏 return "<input type="hidden" name="{$name}" value="{$value}" {$style}/>"; break; case 'file': // 文件上传 return "<input type= "file"name="{$name}" {$style}/>"; break; case 'submit': // 提交 return "<input type="submit" name="{$name}" value="$value" $style}/>"; break; default: return "{$type}类型错误!!!"; break; } } /** * 提交信息检测 * 错误返回error */ private function postFind($arr,$key) { if(emptyempty($arr))return false; $name = $title =$error =$find =$standard =null; // input NAME $name = trim($arr[0]); // input Title $title = trim($arr[2]); // 错误提示 $error = trim($arr[4]); // 检测类型 Y N $find = trim($arr[5]); // 检测标准 $standard = trim($arr[6]); // if(!emptyempty($standard))$this->error .=$this->ck_split($standard,$name,$title,$find,$error); // 转换为字符串 if(is_array($this->post[$name]))$this->post[$name] = implode(",",$this->post[$name]); // 转义或其他转化 $KKarray = array(); if(preg_match("/Y|N/is",$find)) { $KKarray = split("_", $find); // 转义或过滤 $escape_filter = (!emptyempty($KKarray[1]))?'ck_'.$KKarray[1]:''; // 输出通过检测的合法数据 $data = ($escape_filter)?$this->$escape_filter($this->post[$name]):$this->post[$name]; } else $data = ""; // 输出新的数据 return $data; } /** * 多选类表单生成 */ private function formSelect($type,$name,$value,$title,$style) { $outform = null; // 触发更新和提交动作时的初始 $nowvalue = (!emptyempty($this->post[$name]))?$this->post[$name]:$this->infoarray[$name]; // 兼容多选的识别,转为数组 if(!emptyempty($nowvalue))$valueArray = explode(",",$nowvalue); // 选项标题 if(is_array($title)) { array_unshift($title,'选择'); $titarray = array_values($title); }else $titarray = explode("|",$title); // 选项值 if(is_array($value)) { array_unshift($value,'选择'); $valarray = array_keys($value); if(emptyempty($title))$titarray = array_values($value); } else $valarray = explode("|",$value); // 取消表单的初始默认值 if(!emptyempty($this->post)&&!emptyempty($this->infoArray))$value = preg_replace("/Y_/i",'',$value); foreach ($valarray as $key =>$varl) { // 非默认的识别 if(!emptyempty($valueArray))$select = (in_array($varl,$valueArray))?'Y':''; // 判断是否为默认 else $select = (eregi("Y_",$varl))? 'Y':''; if($key >'0') { $_title=($titarray[$key])? $titarray[$key]:$title; switch ($type) { case 'select': if('Y' == $select)$select = 'selected'; $outform .= sprintf("<option %s value="%s"/>%s</option>rn" ,$select,preg_replace("/Y_/i",'',$varl),$_title); break; case 'radio': if('Y' == $select)$select = 'checked'; $outform .= sprintf("<label>%s<input %s type="radio" name="%s" value="%s" %s/></label>rn", $_title,$select,$name,$varl,$style); break; case 'checkbox': if('Y' == $select)$select = 'checked'; $outform .= sprintf("<label>%s<input %s type="checkbox" name="%s[]" value="%s" %s/></label>rn",$_title,$select,$name,$varl,$style); break; } $select =null; } } // 下拉选择 if($type =='select')$outform = sprintf('<select name="%s" %s>%s</select>',$name,$style,$outform); return sprintf("<dt>%s</dt><dd>%s<tt id="J%s"></tt></dd>rn",$titarray[0],$outform,$name); } /** * 表单验证 及全部 ck_类函数 */ private function ck_split($standard,$name,$title,$find,$error) { // 非必填缺省跳过 if(eregi('N',$find) && emptyempty($this->post[$name]))return false; // 必填缺省检测 if(eregi('Y',$find) && emptyempty($this->post[$name]))return "["J{$name}","$error"],"; $t_error = null; // 多项检测 $arr = explode(',',$standard); // POST数据检测 if(!emptyempty($arr))foreach ($arr as $var) { if(trim($var)!='') { switch ($this->post) { case is_array($this->post[$name]): // 数组类的检测 foreach ($this->post[$name] as $_var) { $t_error.= ($this->ck_open($_var,trim($var)))?"":$error; if($t_error)break; } break; default: $t_error.= ($this->ck_open($this->post[$name],trim($var)))?"":$error; break; } if($t_error)break; } } return ($t_error)? "["J{$name}","$t_error"],":""; } // 函数调用 private function ck_open($string,$str) { $functi = $this->ck_detected($str); return ($this->$functi($string,$str))? true:false; } // 类型判断 private function ck_detected($str) { $detect = (eregi("^[a-zA-Z]*$",$str))? "{$str}Detect":'lengthDetect'; if(!in_array($detect,$this->array['class'])) { location('index.php',$ck,' Lack of function !!!'); } return $detect; } //-------------------------------------以下为检测函数可外部调用 // 长度 public function lengthDetect($string,$str){ $len = split('-',trim($str)); return (strlen($string) > ($len[0]-1) && strlen($string) < ($len[1]+1))? true:false; } // 价格 public function moneyDetect($str){ return preg_match("/^(-|+)?d+(.d+)?$/",$str); } // 邮件 public function emailDetect($str){ return preg_match("/^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$/", $str); } // 网址 public function urlDetect($str){ return preg_match("/^http://[A-Za-z0-9]+.[A-Za-z0-9]+[/=?%-&_~`@[]':+!]*([^<>"])*$/", $str); } // 数字型 public function numDetect($str){ return is_numeric($str); } // 中文 public function cnDetect($str){ return preg_match("/^[x7f-xff]+$/", $str); } // 字母 public function enDetect($str){ return preg_match("/^[A-Za-z]+$/", $str); } // 数字字母混合 public function numenDetect($str){ return preg_match("/^([a-zA-Z0-9_-])+$/",$str); } // 电话号码 public function telDetect($str){ return ereg("^[+]?[0-9]+([xX-][0-9]+)*$", $str); } // 敏感词 public function keyDetect($str){ return (!preg_match("/$badkey/i",$str)); } //-----------------------------------------------------输出 // 字符替换 public function ck_filter($str){ $str=(is_array($str))? implode(",",$str):$str; $str=nl2br($str); //将回车替换为<br> $str=htmlspecialchars($str); //将特殊字元转成 HTML 格式。 //$str=str_replace(array(" ",'<? '),array(" ",'< ?'),$str); //替换空格替换为 return $str; } // 转义 function ck_escape($str) { if (!get_magic_quotes_gpc())return addslashes($str); return $str; } // MD5加密 public function ck_md5($str){ return MD5($str); } // base64加密 public function ck_base64($str){ return base64_encode($str); } // 时间 function ck_time($str){ // time_r() 来在公用函数文件 if(!is_numeric($str)) { return time_r($str); } else return $str; } // 有条件注销(数字) public function ck_cancel($str){ return (!is_numeric($str))? $str:""; } // 无条件注销 public function ck_delete(){ return null; } // js错误提示 private function jsError() { if(emptyempty($this->error))return false; return " <script language=javascript> rn var error = new Array(".trim($this->error,',')."); rn for (i=0; i < error.length; i++){ rn document.getElementById(error[0]).innerHTML=error[1]; }rn </script> "; } } // 演示: $form[1] =array( 'text'=>array('title','','产品名称','size=40','产品名称不可缺少!','Y','cn,1-30'), 'text1'=>array('categories','','产品名称','','','Y_base64'), 'select'=>array('superiors','||1|2|Y_3','产品类别|选择|1|2|3','','必选项','Y'), 'radio'=>array('superiors1','|1|Y_2|3','产品xun|产品1|产品2|产品3','','必选项','Y'), 'checkbox'=>array('superiors2',array(1=>'11',2=>'22',3=>'33'),'','','必选项','Y'), 'file'=>array('ddd','','文件'), ); $form =array ( 'login' => array ( 'text' => array ( 0 => 'user', 1 => '', 2 => '用户名', 3 => 'size=20', 4 => '!', 5 => 'Y', 6 => 'numen,6-12', ), 'password' => array ( 0 => 'pass', 1 => '', 2 => '密 码', 3 => 'size=22', 4 => '密码格式错误!', 5 => 'Y_md5', 6 => 'numen,6-12', ), 'radio' => array ( 0 => 'time', 1 => '|7200|3600|1800', 2 => 'cookies有效时间|2小时|1小时|30分钟', 3 => '', 4 => '', 5 => 'N_delete', 6 => '', ), ), ); // 表单提交效验 $past = $_form->postForm($form['login']); $dd = array('title'=>'标题','categories'=>'类别'); // $dd 为已有的信息(如更新时的信息输出) POST数据位内部处理具有优先权 if(!emptyempty($past)) { echo "<pre>"; print_r($past); echo"</pre>"; } echo '<form method="POST" NAME="PostTopic" action="" enctype="multipart/form-data" style="margin:0px;">'; echo $_form->formHtml($form['login'],$dd); echo '<input type="submit" value="Y" name="B1"></form>';
希望本文所述对大家的PHP程序设计有所帮助。 |