how to retain the value of form??

[sweetline priya]

hi friends..

in my page the form contains 10 textboxes. the user has to fill these textfields.

if the user made any mistake in entering value in any textbox, in the button click, a message is displayed to intimate the user like ' u wrongly enter the value'.. in button click all the textbox values are erased. so can anybody tell me how to retain the value of textbox(without GET method because it is an unsecured one.. since all the values are displayed in address bar)

and i need to retain in the same page, without moving to some other page... can anybody help me plz.....

[Markus]

Well are you using POST? If so, your data will still be in the POST array (if you submit to the same page). So, for your input's value attribute, just echo the value from the POST array.

<input type="text" name="username" value="<?php echo @$_POST['username']; ?>" />

[sweetline priya]

<input type="text" name="username" value="<?php echo @$_POST['username']; ?>" />

why the symbol '@' here?? can you explain!

[sweetline priya]

@Markus
can u clarify one more doubt!! how to retain value for combo box???

[Markus]

why the symbol '@' here?? can you explain!

The '@' symbol simply suppresses an error - the error here being an 'undefined index' error. I would not recommend using it on just anything - we can be sure this error will not cause any failures, so we can escape it. We could use isset() to check for the variable, but that's more writing ;)

[Markus]

@Markus
can u clarify one more doubt!! how to retain value for combo box???

How are you generating your select element?

[sweetline priya]

How are you generating your select element?

i am using following coding to retrieve data from database...

[code=php]
$sql=mysql_quer y("SELECT system_type FROM systemtype ",$con);
for($i = 0; $i < mysql_num_rows( $sql ); $i++)
{
$tmp = mysql_fetch_row ( $sql );
print("<OPTION value=\"$tmp[0]\">$tmp[0]</OPTION>\n");
}[/code]

[Markus]

i am using following coding to retrieve data from database...


$sql=mysql_quer y("SELECT system_type FROM systemtype ",$con);
for($i = 0; $i < mysql_num_rows( $sql ); $i++)
{
$tmp = mysql_fetch_row ( $sql );
print("<OPTION value=\"$tmp[0]\">$tmp[0]</OPTION>\n");
}

Is this a multi select or single select?

[sweetline priya]

@Markus

its a single select only..

[Markus]

Have a look at this thread. See what you can learn from that, and then post what you've tried.

- Markus.