My simple PHP function for maintaining values in my form isn't working. Really newbie!
Here's my code:
<html>
<head>
<?php
function getValue($field){
if(isset($_GET[$field])){
ret开发者_StackOverflow社区urn $_GET[$field];
}
else{
return "";
}
}
?>
</head>
<body>
<form action="class2.php" method="get">
<dl>
<dt>First Name:</dt>
<dd><input type="text" value="<?php echo htmlspecialchars(getValue($_GET['name'])) ?>" name="name" />
</dd>
<dt>Last Name:</dt>
<dd><input type="text" value="<?php echo htmlspecialchars(getValue($_GET['lastname'])) ?>" name="lastname" />
</dd>
<br />
<dt>
<input type="submit" value="enviar" />
</dt>
</dl>
</form>
</body>
If I write a value in Name and nothing in LastName, the value in Name SHOULD stay there, right? What am I doing wrong?
getValue('name') not getValue($_GET['name']);
Your problem is that you are using
getValue($_GET['name'])
instead of
getValue( 'name' )
You are calling getValue() with the contents of $_GET['name'] right now
Also:
Your getValue function doesn't make much sense right now. Why not build in htmlspecialchars() into it directly instead of applying it to its return value?
Firstly, do you really need a function just to retrieve an elem of the $_GET array?
Because you're reading a GET request, if you refresh this page and don't submit your form (and clear the query string), you'll lose your data in $_GET.
If you want to keep hold of this information, you can place it in the session ($_SESSION).
Don't forget to filter your input and escape your output.
Within the <dd><input... tags, that PHP should read:
<dd><input type="text" value="<?php echo htmlspecialchars(getValue( 'name' )) ?>" name="name" />
The function you wrote knows to take that value name, and look for it within the GET array, no need to tell it to do that when you call it.
加载中,请稍侯......
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