Field Checking

IT-Guy · February 18, 2008

What Iam trying to do is teach myself how to get php to check a field, and if the field is empty it returns you to the form saying, '$whatever-field-name Field was empty'

So here is my script, the error Im getting is:

Parse error: parse error, unexpected $end in D:\my\website\login\test\username.php on line 56

Here is my script, any suggestions on how I fix this?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta http-equiv="Content-Language" content="en-us" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Username</title>
<style type="text/css">
input {color:#666;}

</style>
</head>

<body>

<table style="width: 100%">
<tr>
	<td>Username </td>
</tr>
<?php
##session_start();
$con = mysql_connect("****","***","***") or die('Could not connect: ' . mysql_error());
mysql_select_db("test", $con);



if(!$_POST['submit']){
echo "<table border=\"0\" cellspacing=\"3\" cellpadding=\"3\">\n";
echo "<form method=\"post\" action=\"username.php\">\n";
echo "<tr><td>Username</td><td><input type=\"text\" name=\"username\"></td></tr>\n";
echo "<tr><td colspan=\"2\" align=\"right\"><input type=\"submit\" value=\"Submit\" name=\"submit\"></td></tr>\n";
echo "</form></table>\n";
}else {

$error = array();


if(empty($_POST['username'])) {
	$error[] = "Your username was empty!";
}
<tr>
	<td><input name="Username" size="10" type="text" /></td>
</tr>
</table>
<p><input value="Submit Form" type="submit" /></p>

</body>

</html>

darkfreaks · February 18, 2008

<?php
$username=$_POST['username'];
if ($username=="") {$error[] = "Your username was empty!";}?>

IT-Guy · February 18, 2008

<?php
if ($field=="") { echo "this field is empty!";}?>

Do I have to put anything in between the field=="" quotations

soycharliente · February 18, 2008

<?php
if (empty($field)) { echo "This field is empty!"; }
?>

I would use empty because of the number of different checks it does. Check out the return values section.

http://us2.php.net/empty

darkfreaks · February 18, 2008

its just another way of checking if it is empty. and no you dont. look at my code above now

IT-Guy · February 18, 2008

I took a look, and fixed the code you suggested and now Im getting a parse error on line 42, but there isn't 41 lines of code

Any suggestions?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta http-equiv="Content-Language" content="en-us" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Username</title>
<style type="text/css">
input {color:#666;}

</style>
</head>

<body>

<table style="width: 100%">
<tr>
	<td>Username <br />
	<input name="username" size="10" type="text" /><br />
	<input value="submit" type="submit" /></td>
</tr>
<?php
##session_start();
$con = mysql_connect("****","****","****") or die('Could not connect: ' . mysql_error());
mysql_select_db("***", $con);



if(!$_POST['submit']){
echo "<table border=\"0\" cellspacing=\"3\" cellpadding=\"3\">\n";
echo "<form method=\"post\" action=\"username.php\">\n";
echo "<tr><td>Username</td><td><input type=\"text\" name=\"username\"></td></tr>\n";
echo "<tr><td colspan=\"2\" align=\"right\"><input type=\"submit\" value=\"submit\" name=\"submit\"></td></tr>\n";
echo "</form></table>\n";
}else {

$error = array();

if ($field=="") { echo "this field is empty!";}
?>

IT-Guy · February 18, 2008

I got it all fixed! Thanks everyone for the help!

law · February 18, 2008

just a thought but for the future it might be easier for you to use little qoutes inside of big quotes.. i guess its just all on what your comfortable with?

example

<?php
echo "Now that i am using double quotes to display this text as html i can use 'single quotes' without a problem";
echo "<input type='reset' name='reset' value='Reset'>";
?>

IT-Guy · February 18, 2008

Ok, now that I got it fixed, when it actions, it actions to username.php (which is the name of the document Im using to test this out)

Now if you leave the field blank, hit submit, it returns and says, 'This Field Is Empty' but it no longer shows the text box for the username field. - Why is that? Anyone know?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<?php
##session_start();
$con = mysql_connect("****","****","*****") or die('Could not connect: ' . mysql_error());
mysql_select_db("login", $con);

if(!$_POST['submit']){
echo "<table border=\"0\" cellspacing=\"3\" cellpadding=\"3\">\n";
echo "<form method=\"post\" action=\"username.php\">\n";
echo "<tr><td>Username</td><td><input type=\"text\" name=\"username\"></td></tr>\n";
echo "<tr><td colspan=\"2\" align=\"right\"><input type=\"submit\" value=\"submit\" name=\"submit\"></td></tr>\n";
echo "</form></table>\n";
}else {

$error = array();

if ($field=="") { echo "this field is empty!";}
}
?>

soycharliente · February 18, 2008

The way you have coded, you can't have both. They are in separate if else brackets.

IT-Guy · February 18, 2008

So if I were to put it all in one bracket, it will display the field?

law · February 18, 2008

i could be wrong but you really don't need the

if(!$_POST['submit']){}else{}

at all? i think the site will do what you intend for it to without that code

----Edited below---

also don't you need to define the $field because currently it is nothing right?

$field = $_POST['username'];

also there is a better way to right this to avoid someone using injection on you.. but i am not 100% sure what it is so im not going to tell you the wrong thing

darkfreaks · February 18, 2008

<?php
##session_start();
$con = mysql_connect("****","****","*****") or die('Could not connect: ' . mysql_error());
mysql_select_db("login", $con);
$username=mysql_real_escape_string(trim(strip_tags($_POST['username'])));

if(!$_POST['submit']){
echo "<table border=\"0\" cellspacing=\"3\" cellpadding=\"3\">\n";
echo "<form method=\"post\" action=\"username.php\">\n";
echo "<tr><td>Username</td><td><input type=\"text\" name=\"username\"></td></tr>\n";
echo "<tr><td colspan=\"2\" align=\"right\"><input type=\"submit\" value=\"submit\" name=\"submit\"></td></tr>\n";
echo "</form></table>\n";
}else {

$error = array();}

if ($username=="") { echo "this field is empty!";}
}
?>

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