Heim  >  Artikel  >  Backend-Entwicklung  >  PHP – Name, E-Mail und URL validieren

PHP – Name, E-Mail und URL validieren

WBOY
WBOYOriginal
2016-07-30 13:30:491188Durchsuche

Das Folgende ist der Quellcode:

<code><span><!DOCTYPE HTML></span><span><<span>html</span>></span><span><<span>head</span>></span><span><<span>style</span>></span><span><span>.error</span><span>{<span><span>color</span>:<span><span>#FF0000</span></span></span>;<span>}</span></span></span><span></<span>style</span>></span><span></<span>head</span>></span><span><<span>body</span>></span><span><span><?php</span><span>// define variables and set to empty values</span><span>$nameErr</span> = <span>$emailErr</span> = <span>$genderErr</span> = <span>$websiteErr</span> = <span>""</span>;
<span>$name</span> = <span>$email</span> = <span>$gender</span> = <span>$comment</span> = <span>$website</span> = <span>""</span>;

<span>if</span> (<span>$_SERVER</span>[<span>"REQUEST_METHOD"</span>] == <span>"POST"</span>)
{
   <span>if</span> (<span>empty</span>(<span>$_POST</span>[<span>"name"</span>]))
     {<span>$nameErr</span> = <span>"Name is required"</span>;}
   <span>else</span>
     {
     <span>$name</span> = test_input(<span>$_POST</span>[<span>"name"</span>]);
     <span>// check if name only contains letters and whitespace</span><span>if</span> (!preg_match(<span>"/^[a-zA-Z ]*$/"</span>,<span>$name</span>))
       {
       <span>$nameErr</span> = <span>"Only letters and white space allowed"</span>; 
       }
     }

   <span>if</span> (<span>empty</span>(<span>$_POST</span>[<span>"email"</span>]))
     {<span>$emailErr</span> = <span>"Email is required"</span>;}
   <span>else</span>
     {
     <span>$email</span> = test_input(<span>$_POST</span>[<span>"email"</span>]);
     <span>// check if e-mail address syntax is valid</span><span>if</span> (!preg_match(<span>"/([\w\-]+\@[\w\-]+\.[\w\-]+)/"</span>,<span>$email</span>))
       {
       <span>$emailErr</span> = <span>"Invalid email format"</span>; 
       }
     }

   <span>if</span> (<span>empty</span>(<span>$_POST</span>[<span>"website"</span>]))
     {<span>$website</span> = <span>""</span>;}
   <span>else</span>
     {
     <span>$website</span> = test_input(<span>$_POST</span>[<span>"website"</span>]);
     <span>// check if URL address syntax is valid (this regular expression also allows dashes in the URL)</span><span>if</span> (!preg_match(<span>"/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i"</span>,<span>$website</span>))
       {
       <span>$websiteErr</span> = <span>"Invalid URL"</span>; 
       }
     }

   <span>if</span> (<span>empty</span>(<span>$_POST</span>[<span>"comment"</span>]))
     {<span>$comment</span> = <span>""</span>;}
   <span>else</span>
     {<span>$comment</span> = test_input(<span>$_POST</span>[<span>"comment"</span>]);}

   <span>if</span> (<span>empty</span>(<span>$_POST</span>[<span>"gender"</span>]))
     {<span>$genderErr</span> = <span>"Gender is required"</span>;}
   <span>else</span>
     {<span>$gender</span> = test_input(<span>$_POST</span>[<span>"gender"</span>]);}
}

<span><span>function</span><span>test_input</span><span>(<span>$data</span>)</span>
{</span><span>$data</span> = trim(<span>$data</span>);
     <span>$data</span> = stripslashes(<span>$data</span>);
     <span>$data</span> = htmlspecialchars(<span>$data</span>);
     <span>return</span><span>$data</span>;
}
<span>?></span></span><span><<span>h2</span>></span>PHP Form Validation Example<span></<span>h2</span>></span><span><<span>p</span>></span><span><<span>span</span><span>class</span>=<span>"error"</span>></span>* required field.<span></<span>span</span>></span><span></<span>p</span>></span><span><<span>form</span><span>method</span>=<span>"post"</span><span>action</span>=<span>"<?php echo htmlspecialchars($_SERVER["</span><span>PHP_SELF"]);?</span>></span>"> 
   Name: <span><<span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"name"</span>></span><span><<span>span</span><span>class</span>=<span>"error"</span>></span>* <span><span><?php</span><span>echo</span><span>$nameErr</span>;<span>?></span></span><span></<span>span</span>></span><span><<span>br</span>></span><span><<span>br</span>></span>
   E-mail: <span><<span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"email"</span>></span><span><<span>span</span><span>class</span>=<span>"error"</span>></span>* <span><span><?php</span><span>echo</span><span>$emailErr</span>;<span>?></span></span><span></<span>span</span>></span><span><<span>br</span>></span><span><<span>br</span>></span>
   Website: <span><<span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"website"</span>></span><span><<span>span</span><span>class</span>=<span>"error"</span>></span><span><span><?php</span><span>echo</span><span>$websiteErr</span>;<span>?></span></span><span></<span>span</span>></span><span><<span>br</span>></span><span><<span>br</span>></span>
   Comment: <span><<span>textarea</span><span>name</span>=<span>"comment"</span><span>rows</span>=<span>"5"</span><span>cols</span>=<span>"40"</span>></span><span></<span>textarea</span>></span><span><<span>br</span>></span><span><<span>br</span>></span>
   Gender:
   <span><<span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>"gender"</span><span>value</span>=<span>"female"</span>></span>Female
   <span><<span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>"gender"</span><span>value</span>=<span>"male"</span>></span>Male
   <span><<span>span</span><span>class</span>=<span>"error"</span>></span>* <span><span><?php</span><span>echo</span><span>$genderErr</span>;<span>?></span></span><span></<span>span</span>></span><span><<span>br</span>></span><span><<span>br</span>></span><span><<span>input</span><span>type</span>=<span>"submit"</span><span>name</span>=<span>"submit"</span><span>value</span>=<span>"Submit"</span>></span><span></<span>form</span>></span><span><span><?php</span><span>echo</span><span>"<h2>Your Input:</h2>"</span>;
<span>echo</span><span>$name</span>;
<span>echo</span><span>"<br>"</span>;
<span>echo</span><span>$email</span>;
<span>echo</span><span>"<br>"</span>;
<span>echo</span><span>$website</span>;
<span>echo</span><span>"<br>"</span>;
<span>echo</span><span>$comment</span>;
<span>echo</span><span>"<br>"</span>;
<span>echo</span><span>$gender</span>;
<span>?></span></span><span></<span>body</span>></span><span></<span>html</span>></span></code>

Das Obige hat PHP eingeführt – die Überprüfung von Name, E-Mail und URL, einschließlich des Inhalts. Ich hoffe, dass es für Freunde hilfreich sein wird, die an PHP-Tutorials interessiert sind.

Stellungnahme:
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn