PHP Error: Undefined index: event_list when I think its already defined. -
i complete noob in php , programming well. new programming question might stupid, please patient.
i having undefined index error in think defined.
i have here codes.
index.php
<?php include('functions.php'); ?> <?php $yr = $_get['year_list']; $evnt = $_get['event_list']; ?> <html> <head> <script type="text/javascript" src="myscripts.js"></script> </head> <body> <div> <form name="myform" > select year: <?php echo hspacer(1); ?> <select id="year_list" name="year_list"> <?php for($year = (date('y') - 100); $year <= (date('y') + 100); $year++ ) { if ($year == date('y')) echo "<option value='$year' name='$year' selected='' >" . $year . "</option>"; else echo "<option value='$year' name='$year' >" . $year . "</option>"; } ?> </select> <?php echo hspacer(5); ?> select event: <?php echo hspacer(1); ?> <select id="event_list" name="event_list" > <?php $events = array("karate tournament", "beauty pageant", "film festival", "singing contest", "wedding"); foreach($events $event) echo "<option value='$event' name='$event' >" . $event . "</option>"; ?> </select> <?php echo vspacer(2); echo hspacer(22); ?> <input type="submit" id="add_description" name="add_description" value="add description" onclick=""/> </form> </div> </body> </html> functions.php
<?php function hspacer($num_of_spaces) { $spaces = ""; if ($num_of_spaces > 0) for($i=0; $i<$num_of_spaces; $i++ ) $spaces .= " "; return $spaces; } function vspacer($num_of_linefeeds) { $linefeeds = ""; if ($num_of_linefeeds > 0) for($i=0; $i<$num_of_linefeeds; $i++ ) $linefeeds .= "<br />"; return $linefeeds; } ?> what don't understand this, think when declared element id can use id index $_get or $_post. secondly, why second element (event_list) not recognized when have same declaration first element (year_list). i'm confused inconsistency. second element not recognized while other first 1 recognized. can please explain me in simple way beginner me can understand.
could have &year_list allready in url, when accessing page? otherwise there no reason not same error when accessing $_get['year_list'];
and should check access _get/_post etc. instead of assuming keys set.
try:
$yr = isset($_get['year_list']) ? $_get['year_list'] : null; $evnt = isset($_get['event_list']) ? $_get['event_list'] : null; you build function reduce of code. have at:
http://php.net/manual/en/ref.filter.php , http://www.php.net/manual/en/ini.core.php#ini.register-globals
Comments
Post a Comment