PHP表單驗證內容是否為空白的實現代碼

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上載者:User
內容為空白為:



填寫內容:



下面是驗證程式的代碼:



<!doctype html><html><head><meta http-equiv="conent-type" content="text/html" charset="utf-8"/><style>.red{color:red;}</style></head><body><?phpfunction test_input($data){  $data=trim($data);  $data=stripslashes($data);  $data=htmlspecialchars($data);  return $data;}?><?php$name=$email=$web=$comment=$gender="";$nameerr=$emailerr=$weberr=$commenterr=$gendererr="";if($_SERVER['REQUEST_METHOD']=="POST"){  if(empty($_POST['name'])){    $nameerr="必填名字";  }else{    $name=test_input($_POST['name']);  }  if(empty($_POST['email'])){    $emailerr="必填郵件";  }else{    $email=test_input($_POST['email']);  }  if(empty($_POST['web'])){    $weberr="必填網址";  }else{    $web=test_input($_POST['web']);  }  if(empty($_POST['comment'])){    $commenterr="必填備忘";  }else{    $comment=test_input($_POST['comment']);  }  if(empty($_POST['gender'])){    $gendererr="必填備忘";  }else{    $gender=test_input($_POST['gender']);  }}?><h1>表單驗證</h1><span class="red">*必要欄位</span><form method="POST" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']);?>">名字:<input type="text" name="name"/><span class="red"><?php echo "*".$nameerr;?></span><br/>E-mail:<input type="text" name="email"/><span class="red"><?php echo "*".$emailerr;?></span><br/>網址:<input type="text" name="web"/><span class="red"><?php echo "*".$weberr;?></span><br/>備忘:<textarea rows="10" cols="40" name="comment"></textarea><span class="red"><?php echo "*".$commenterr;?></span><br/>性別:<input type="radio" name="gender" value="男"/>男<input type="radio" name="gender" value="女"/>女<span class="red"><?php echo "*".$gendererr;?></span><br/><input type="submit" value="提交驗證"/></form><?phpecho "名字".$name;echo "<br/>";echo "E-mail:".$email;echo "<br/>";echo "網址:".$web;echo "<br/>";echo "備忘:".$comment;echo "<br/>";echo "性別:".$gender;echo "<br/>";?></body></html>

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