Post Submit error, then back show nothing in application form

Hi there,

I have a question and hope to get answer.

After I submitted application form, an error occurred, then I go back and nothing displayed instead of displaying what wasn't error. Here is my code:

if (isset($_POST['submit'])) {
			$title = $_POST['title'];
if ($title == "") {$error[] = "TITLE Required!";
}if (!isset($error)) {
				 
$sql = "INSERT INTO news VALUES (''$title'')";
$result = mysql_query($sql);
mysql_query("SET NAMES 'utf8'");

 header("Location: ./application_form.php?success=");
					 
					 
 }else
		{
			foreach ($error as $item) {
				$output.= "<p>" . $item . "</p>";
			}

		}


} else {
if (isset($_GET['success'])) 
$output.= "<p>Successfully Added!</p>"; 
$output.= "<form enctype=\"multipart/form-data\" id=\"up\" name=\"up\" action=\"\" method=\"post\">\n";
$output.= "<p><tr><td>Title < 100</td><br /><td><input class=\"text\" id=\"title\" name=\"title\" type=\"text\" value='$title' /></td></tr></p>\n";
$output.= "<p><input id=\"submit\" name=\"submit\" type=\"submit\" value=\"Submit\" /></p>\n";
$output.= "</form>\n";}


print $output;

PHP:

Thanks for all.

 

This should do it... Organise your code better...

<?php
    $error = 0;
    $error_msg = '';
    $output = '';
    
    if(isset($_REQUEST['submit'])) {
        if(!isset($_POST['title']) || (isset($_POST['title']) && strlen($_POST['title']) == 0)) {
            $error++;
            $error_msg .= "The Title field is required.<br />";
        }
        
        if ($error == 0) 
        {
            mysql_query("SET NAMES 'utf8'");
            $result = mysql_query("INSERT INTO news VALUES (''$title'')");
        }
    }
    
    if(isset($_REQUEST['submit']) && $error == 0) 
        $output .= '    <p>Successfully Added!</p>';
    else if(isset($_REQUEST['submit']) && $error > 0)
        $output .= '    <div>'.$error_msg.'</div>';
        
    $output.= ' <form enctype="multipart/form-data" id="up" name="up" action="" method="post">
                <p>
                    <table>
                    <tr>
                        <td>Title < 100</td>
                        <td>
                            <input class="text" id="title" name="title" type="text" value='.((isset($_REQUEST['submit']) && $error > 0 && isset($_POST['title']) && strlen($_POST['title']) > 0) ? $_POST['title'] : '').' />
                        </td>
                    </tr>
                    </table>
                </p>
                <p><input id="submit" name="submit" type="submit" value="Submit" /></p>
                </form>';
 echo $output;
?>

PHP:

 

it's great work, but I realized if I put these codes into my system it disappears when I go back...What is wrong with my system????

 

What exactly dissapears ?

 

I think it is about quote. I will look mysql_real_escape_string function to fix it.

 

<?php
    $error_msg = array();
  
    if(isset($_REQUEST['submit'])) {
        if(!isset($_POST['title']) || strlen($_POST['title']) == 0) {
            $error_msg[] = "The Title field is required.";
        }
       
        if (count($error_msg) <= 0) {
            mysql_query("SET NAMES 'utf8'");
            $result = mysql_query("INSERT INTO news VALUES ('" . mysql_real_escape_string($title) . "')");
        }
    } else {
        $_POST['title'] = '';
    }
   
    if (isset($_REQUEST['submit']) && count($error_msg) == 0) {
        $output = '    <p>Successfully Added!</p>';
    } else if (count($error) > 0) {
        $output = '    <div>'.implode('<br />', $error_msg).'</div>';
    }
    $output.= ' <form enctype="multipart/form-data" id="up" name="up" action="" method="post">
                <p>
                    <table>
                    <tr>
                        <td>Title < 100</td>
                        <td>
                            <input class="text" id="title" name="title" type="text" value="' . $_POST['title'] . '" />
                        </td>
                    </tr>
                    </table>
                </p>
                <p><input id="submit" name="submit" type="submit" value="Submit" /></p>
                </form>';
 echo $output;
?>

PHP: