twilitegxa Posted September 15, 2009 Share Posted 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 $display_block; ?> </div> <?php include("bottomnav.php"); ?><!-- FOOTER --> <!-- FOOTER --> <div id="footer_wrapper"> <div id="footer"> <p>Sailor Moon and all characters are<br /> trademarks of Naoko Takeuchi.</p> <p>Copyright © 2009 Liz Kula. All rights reserved.<br /> A product of <a href="#" target="_blank">Web Designs By Liz</a> systems.</p> <div id="foot-nav"> <ul> <li><a href="http://validator.w3.org/check?uri=http://webdesignsbyliz.com/digital/index.php" target="_blank"><img src="http://www.w3.org/Icons/valid-xhtml10-blue" alt="Valid XHTML 1.0 Transitional" height="31" width="88" /></a></li> <li><a href="http://jigsaw.w3.org/css-validator/validator?uri=http://webdesignsbyliz.com/digital/global.css" target="_blank"><img class="c2" src="http://jigsaw.w3.org/css-validator/images/vcss-blue" alt="Valid CSS!" /></a></li> </ul> </div> </div> </div> <!-- /FOOTER --> </body> </html> Link to comment https://forums.phpfreaks.com/topic/174378-solved-cannot-submit-if-condition-is-met-help/ Share on other sites More sharing options...
MadTechie Posted September 15, 2009 Share Posted September 15, 2009 but I don't know how to set it to where they cannot submit it this condition is met: Huh! Link to comment https://forums.phpfreaks.com/topic/174378-solved-cannot-submit-if-condition-is-met-help/#findComment-919210 Share on other sites More sharing options...
twilitegxa Posted September 15, 2009 Author Share Posted September 15, 2009 Well, I guess I want the query not to run if the condition is met. How can I do that? Link to comment https://forums.phpfreaks.com/topic/174378-solved-cannot-submit-if-condition-is-met-help/#findComment-919212 Share on other sites More sharing options...
MadTechie Posted September 15, 2009 Share Posted September 15, 2009 or only run the query if the reverse condition is met if ($energy > 0) { //SQL query } or if ($energy <= 0) { echo "Error: no energy "; }else{ //SQL query } Link to comment https://forums.phpfreaks.com/topic/174378-solved-cannot-submit-if-condition-is-met-help/#findComment-919216 Share on other sites More sharing options...
twilitegxa Posted September 15, 2009 Author Share Posted September 15, 2009 Thank you! That did the trick! Link to comment https://forums.phpfreaks.com/topic/174378-solved-cannot-submit-if-condition-is-met-help/#findComment-919217 Share on other sites More sharing options...
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