一个表单数据检查思路....

 1 <! DOCTYPE html  PUBLIC   " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >  2 < html xmlns = " http://www.w3.org/1999/xhtml "  lang = " zh-CN " >< head >< meta http - equiv = " content-type "  content = " text/html; charset=utf-8 "   />< meta http - equiv = " content-language "  content = " zh-CN "   />< meta http - equiv = " pragma "  content = " no-cache "   />< meta http - equiv = " expires "  content = " 0 "   />< meta http - equiv = " MSThemeCompatible "  content = " Yes "   />< meta http - equiv = " imagetoolbar "  content = " no "   />  3 < meta http - equiv = " widow-target "  content = " _top "   />< meta name = " robots "  content = " index, follow "   />< meta name = " author "  content = " 3945, ljm77@km169.net "   />  4 < meta name = " keywords "  content = ""   />< meta name = " description "  content = ""   />< meta name = " copyright "  content = " Copyright 3945 All Rights Reserved "   />  5 < title > 无标题文档 </ title >  6 < style type = " text/css " ><!--  7 a ,  a : link{text - decoration :  none; color : # 000000; font-size:9pt;}    a:visited{text-decoration: none; color:#000000;}    a:hover{text-decoration: underline; color:red;}  8 body ,  td ,  p ,  li ,  div ,  select{font - size : 9pt; font - family : " 宋体 " ;}  9 --></ style > 10 </ head > 11 12 < body > 13 14 15 <? php 16 /* 17 检测表单数据, 18 一至以来都想做个方便一点的表单数据检查程序.但看来看去没有什么好方法, 19 这是今天想到的.利用表单元素的NAME属性. 20 我们在定义表单元素时,把NAME的属性定义成带数据类型的格式如: 21 <input type="text" name="test_s_n" /> 22 该IPNUT是s[String],n[noNull],test就是表单的表意词. 23 意思就是TEST是字符串,不能为空. 24 有些东西想的不是太清楚.只是一种思路. 25 下面是一个小DEMO 26 */ 27 if ( $_SERVER [ ' REQUEST_METHOD ' ]  ==   ' POST ' ) 28 { 29     checkPost( $_POST ); 30      echo   ' <pre> ' . print_r ( $_POST ,   true ) . ' </pre> ' ; 31 } 32 33 function  checkPost( $data ) 34 { 35      foreach ( $data   as   $key => $val ) 36     { 37          list ( $name ,   $type )  =   explode ( ' _ ' ,   $key ,   2 ); 38          if ( ! is_null ( $type )) 39         { 40              if ( ! ck( $val ,   $type ))  die ( $key   . ' 类型不匹配! ' ); 41         } 42     } 43 } 44 45 function  ck( $value ,   $type ) 46 { 47      $a   = array (); 48      $types   =   explode ( ' _ ' ,   $type ); 49      foreach ( $types   as   $t ) 50     { 51          if ( ' s '   ==   $t ) 52         { 53              $a [ $t ]  =   is_string ( $value ); 54         } 55          if ( ' i '   ==   $t ) 56         { 57              $a [ $t ]  =   is_numeric ( $value ); 58         } 59          if ( ' n '   ==   $t ) 60         { 61              $a [ $t ]  =   ! empty ( $value ); 62         } 63     } 64      return   in_array ( true ,   $a ); 65 } 66 ?> 67 < form name = " form1 "  method = " post "  action = "" > 68      < input type = " text "  name = " test_s_n "   /> 69      < input type = " submit "  value = " Submit "  name = " b1 "   /> 70      < input type = " reset "  value = " Reset "  name = " b3 "   /> 71 </ form > 72 </ body > 73 </ html >