[SOLVED] Cannot submit if condition is met help?

twilitegxa · September 15, 2009

How can I set an error to display if my $energy variable is less than or equal to 0 so that the user cannot submit the form? Here is what I have. I have it display a message if the $energy is less than or equal to 0, but I don't know how to set it to where they cannot submit it this condition is met:

if ($energy <= 0) {
$display_block .= "You cannot train once your energy is depleted. Please rest.";
} else {
$display_block .= "You have enough energy to train.";
}

Here's the whole page:

<?php

session_start();

include("connect_db.php");

if ((isset($_GET['train'])) && ($_GET['train'] == 'test1')) {

$display_block = "<h3>Train Your Character To Level Up</h3>
<h4>Choose a different <a href=choose_train.php>character</a> to train?</h4>
<table cellpadding=3 cellspacing=3>
<tr>";

$get_player_info = "select * from training WHERE identity = '$_GET[identity]'";
$get_player_info_res = mysql_query($get_player_info, $conn) or die(mysql_error());

while ($player_info = mysql_fetch_array($get_player_info_res)) {

    $id = $player_info['id'];
    $identity = $player_info['identity'];
    $level = $player_info['level'];
    $energy = $player_info['energy'];
    $experience = $player_info['experience'];
    $update_energy = ($energy - 2);
    $update_experience = ($experience + 50);

$lose_energy = mysql_query("UPDATE training SET energy ='$update_energy' WHERE identity = '$identity'");
$gain_experience = mysql_query("UPDATE training SET experience ='$update_experience' WHERE identity = '$identity'");

$display_block .= "
<td valign=top>
<form action=train.php>
<select name=train>
<option>test1</option>
<option>test2</option>
</select>
<input type=submit name=submit value=Train>
<input type='hidden' name='identity' value='$identity' />
</form>
</td>
<td valign=top>Player: $identity<br />
Level: $level<br />
Energy: $energy<br>
Current Experience: $experience<br />
Experience To Next Level:<br />
</td>
</tr>";

}//end while
}//end if

elseif ((isset($_GET['train'])) && ($_GET['train'] == 'test2')) {

$display_block = "<h3>Train Your Character To Level Up</h3>
<h4>Choose a different <a href=choose_train.php>character</a> to train?</h4>
<table cellpadding=3 cellspacing=3>
<tr>";

$get_player_info = "select * from training WHERE identity = '$_GET[identity]'";
$get_player_info_res = mysql_query($get_player_info, $conn) or die(mysql_error());

while ($player_info = mysql_fetch_array($get_player_info_res)) {

    $id = $player_info['id'];
    $identity = $player_info['identity'];
    $level = $player_info['level'];
    $energy = $player_info['energy'];
    $experience = $player_info['experience'];
    $update_energy = ($energy - 10);
    $update_experience = ($experience + 100);

$lose_energy = mysql_query("UPDATE training SET energy ='$update_energy' WHERE identity = '$identity'");
$gain_experience = mysql_query("UPDATE training SET experience ='$update_experience' WHERE identity = '$identity'");

$display_block .= "
<td valign=top>
<form action=train.php>
<select name=train>
<option>test1</option>
<option>test2</option>
</select>
<input type=submit name=submit value=Train>
<input type='hidden' name='identity' value='$identity' />
</form>
</td>
<td valign=top>Player: $identity<br />
Level: $level<br />
Energy: $energy<br>
Current Experience: $experience<br />
Experience To Next Level:<br />
</td>
</tr>";

}

$display_block .= "</table>";

if ($energy <= 0) {
$display_block .= "You cannot train once your energy is depleted. Please rest.";
} else {
$display_block .= "You have enough energy to train.";
}

} else {

$display_block .= "Your character did not train.";

}


?>

<html>
<head>
<title>Sailor Moon RPG - Training Board</title>
<style type="text/css" media="screen">
/*<![CDATA[*/
@import url(global.css); 
/*]]>*/
</style>
</head>
<body>
<!-- HEADER -->
<h1 class="logo">Sailor Moon RPG</h1>
<!-- /HEADER -->
<?php include("topnav.php"); ?>
<div id="main">
<?php include("includes/log.php"); ?>
<?php include("mainnav.php"); ?>
<h1>Sailor Moon RPG - Training Board</h1>
<?php print $display_block; ?>
</div>
<?php include("bottomnav.php"); ?><!-- FOOTER -->
<!-- FOOTER -->
<div id="footer_wrapper">
<div id="footer">
<p>Sailor Moon and all characters
are<br /> 
trademarks of Naoko Takeuchi.</p>
<p>Copyright © 2009 Liz Kula. All rights reserved.<br />
A product of <a href="#" target="_blank">Web Designs By Liz</a> systems.</p>
<div id="foot-nav">
<ul>
<li><a href="http://validator.w3.org/check?uri=http://webdesignsbyliz.com/digital/index.php" target="_blank"><img src="http://www.w3.org/Icons/valid-xhtml10-blue" alt="Valid XHTML 1.0 Transitional" height="31" width="88" /></a></li>
<li><a href="http://jigsaw.w3.org/css-validator/validator?uri=http://webdesignsbyliz.com/digital/global.css" target="_blank"><img class="c2" src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS!" /></a></li>
</ul>
</div>
</div>
</div>
<!-- /FOOTER -->
</body>
</html>

MadTechie · September 15, 2009

but I don't know how to set it to where they cannot submit it this condition is met:

Huh!

twilitegxa · September 15, 2009

Well, I guess I want the query not to run if the condition is met. How can I do that?

MadTechie · September 15, 2009

or only run the query if the reverse condition is met

if ($energy > 0) {
//SQL query
}

or

if ($energy <= 0) {
echo "Error: no energy ";
}else{
//SQL query
}

twilitegxa · September 15, 2009

Thank you! That did the trick!

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[SOLVED] Cannot submit if condition is met help?

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