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[SOLVED] Data not displaying.

Ameslee

By Ameslee
in PHP Coding Help

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Ameslee Member

Ameslee

Posted
Posted
Hello hope someone can help me.  Can anyone tell me why the following code isnt displaying anything, just the headings.

[code]
<?php
$hostname = localhost;
$username = ;
$password = ;

$conn = mysql_connect($hostname, $username, $password) or die(mysql_error());
$connection = mysql_select_db("greenac_VORNExpo", $conn);


$query = "SELECT * FROM `events` WHERE eventid='$id'";
$mysql_result=mysql_query($query,$conn);
$row=mysql_fetch_row($mysql_result);

$date=$row[2];
$day=substr($date,8,2);
$month=substr($date,5,2);
$year=substr($date,0,4);
$date2=$day." - ".$month." - ".$year;

echo("<table width=100%><tr><td width=10%><b>Event:</b><td width=35%>$row[1]");
echo("<tr><td width=10%><b>Date:</b><td width=35%>$date2");
echo("<tr><td width=10%><b>Cost:</b><td width=35%>$row[3]");
echo("<tr><td width=10%><b>Other Info:</b><td width=35%>$row[4]");
echo("<tr><td width=10%><b>Contact Person:</b><td width=35%>$row[5]");
echo("<tr><td width=10%><b>Contact Number:</b><td width=35%>$row[6]");
echo("<tr><td width=10%><b>Mobile:</b><td width=35%>$row[7]");
echo("<tr><td width=10%><b>Email:</b><td width=35%>$row[8]");
echo("</tr></table>");

?>[/code]
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trq Prolific Member

trq

Posted
Posted
[quote]it was working and now it isnt, i dont have a clue why?[/quote]

How do you know its working? You don't test it before using it. At the very least, use a die() statement to catch any error.

[code=php:0]
$mysql_result=mysql_query($query,$conn) or die(mysql_error());
[/code]

The basic syntax for running a select statement should be...

[code=php:0]
if ($result = mysql_query($sql)) {
  if (mysql_num_rows($result) > 0) {
    // now you can be sure you have data.
  }
}
[/code]

Without this kind of basic error handling your application is sure to fall to pieces.
Ameslee Member

Ameslee

Posted
  • Author
Posted
[quote author=thorpe link=topic=119033.msg486917#msg486917 date=1166399275]
[quote]it was working and now it isnt, i dont have a clue why?[/quote]

How do you know its working? You don't test it before using it. At the very least, use a die() statement to catch any error.

[code=php:0]
$mysql_result=mysql_query($query,$conn) or die(mysql_error());
[/code]

The basic syntax for running a select statement should be...

[code=php:0]
if ($result = mysql_query($sql)) {
  if (mysql_num_rows($result) > 0) {
    // now you can be sure you have data.
  }
}
[/code]

Without this kind of basic error handling your application is sure to fall to pieces.
[/quote]

this didnt work!  When i say it was working, i mean data was coming out of the database and being displayed on the page, with no problems before, so i dont know why it isnt now.  I already have a $mysql_result=mysql_query($query,$conn) or die(mysql_error()); statement.
Ameslee Member

Ameslee

Posted
  • Author
Posted
[code]
<?php
$hostname = localhost;
$username = ;
$password = ;

$conn = mysql_connect($hostname, $username, $password) or die(mysql_error());
$connection = mysql_select_db("greenac_VORNExpo", $conn);


$query = "SELECT * FROM `events` WHERE eventid='$eventid'";
$mysql_result=mysql_query($query,$conn);
$row=mysql_fetch_row($mysql_result);

$date=$row[2];
$day=substr($date,8,2);
$month=substr($date,5,2);
$year=substr($date,0,4);
$date2=$day." - ".$month." - ".$year;

echo("<table width=100%><tr><td width=10%><b>Event:</b><td width=35%>$row[1]");
echo("<tr><td width=10%><b>Date:</b><td width=35%>$date2");
echo("<tr><td width=10%><b>Cost:</b><td width=35%>$row[3]");
echo("<tr><td width=10%><b>Other Info:</b><td width=35%>$row[4]");
echo("<tr><td width=10%><b>Contact Person:</b><td width=35%>$row[5]");
echo("<tr><td width=10%><b>Contact Number:</b><td width=35%>$row[6]");
echo("<tr><td width=10%><b>Mobile:</b><td width=35%>$row[7]");
echo("<tr><td width=10%><b>Email:</b><td width=35%>$row[8]");
echo("</tr></table>");

?>[/code]
trq Prolific Member

trq

Posted
Posted
What does this produce?

[code]
<?php
  // connect to database.
  $query = "SELECT * FROM `events` WHERE eventid='$eventid'";
  if ($mysql_result = mysql_query($query,$conn)) {
    if (mysql_num_rows($mysql_result) > 0) {
      $row = mysql_fetch_row($mysql_result);
      $date = $row[2];
      $day = substr($date,8,2);
      $month = substr($date,5,2);
      $year = substr($date,0,4);
      $date2 = $day." - ".$month." - ".$year;
      echo "<table width=100%><tr><td width=10%><b>Event:</b><td width=35%>$row[1]";
      echo "<tr><td width=10%><b>Date:</b><td width=35%>$date2";
      echo "<tr><td width=10%><b>Cost:</b><td width=35%>$row[3]";
      echo "<tr><td width=10%><b>Other Info:</b><td width=35%>$row[4]";
      echo "<tr><td width=10%><b>Contact Person:</b><td width=35%>$row[5]";
      echo "<tr><td width=10%><b>Contact Number:</b><td width=35%>$row[6]";
      echo "<tr><td width=10%><b>Mobile:</b><td width=35%>$row[7]";
      echo "<tr><td width=10%><b>Email:</b><td width=35%>$row[8]";
      echo "</tr></table>";
    } else {
      echo "No results found";
    }
  } else {
    echo "Query failed: ". mysql_error() . ": $query";
  }
?>[/code]
Ameslee Member

Ameslee

Posted
  • Author
Posted
[quote author=thorpe link=topic=119033.msg486941#msg486941 date=1166400652]
What does this produce?

[code]
<?php
  // connect to database.
  $query = "SELECT * FROM `events` WHERE eventid='$eventid'";
  if ($mysql_result = mysql_query($query,$conn)) {
    if (mysql_num_rows($mysql_result) > 0) {
      $row = mysql_fetch_row($mysql_result);
      $date = $row[2];
      $day = substr($date,8,2);
      $month = substr($date,5,2);
      $year = substr($date,0,4);
      $date2 = $day." - ".$month." - ".$year;
      echo "<table width=100%><tr><td width=10%><b>Event:</b><td width=35%>$row[1]";
      echo "<tr><td width=10%><b>Date:</b><td width=35%>$date2";
      echo "<tr><td width=10%><b>Cost:</b><td width=35%>$row[3]";
      echo "<tr><td width=10%><b>Other Info:</b><td width=35%>$row[4]";
      echo "<tr><td width=10%><b>Contact Person:</b><td width=35%>$row[5]";
      echo "<tr><td width=10%><b>Contact Number:</b><td width=35%>$row[6]";
      echo "<tr><td width=10%><b>Mobile:</b><td width=35%>$row[7]";
      echo "<tr><td width=10%><b>Email:</b><td width=35%>$row[8]";
      echo "</tr></table>";
    } else {
      echo "No results found";
    }
  } else {
    echo "Query failed: ". mysql_error() . ": $query";
  }
?>[/code]
[/quote]

"No Results Found" how can that be though? The record is in the database!
trq Prolific Member

trq

Posted
Posted
[quote]"No Results Found" how can that be though? The record is in the database![/quote]

This is the third time this question has been asked. Now, where are you defining $eventid?

Your not. This is just a guess but try channging your query to...

[code=php:0]
$query = "SELECT * FROM `events` WHERE eventid='{$_GET['eventid']}'";
[/code]
chiprivers Advanced Member

chiprivers

Posted
Posted
[quote author=thorpe link=topic=119033.msg486958#msg486958 date=1166401639]
[quote]BINGO! That did it, thanks!  All working now![/quote]

That will select ALL records. Then only display the last one. This is very inificient.
[/quote]

Just thought if we did this we could confirm the problem was with not declaring $eventid like you suggested from the start. If only people would listen to the answers from the start!
trq Prolific Member

trq

Posted
Posted
Sorry, but you are completely confused. The variable itself is used in the query to get the infomation from the database, so no, it cannot being comming from the database itself (because you are yet to get any data).

I really can't help you much more, I can't push this stuff into your brain.

As an example, use the query I gave you...

[code=php:0]
$query = "SELECT * FROM `events` WHERE eventid='{$_GET['eventid']}'";
[/code]

And call the page via a browser with something like....

http://yoursite/thispage.php?eventid=3

Change the 3 to a value that exists as an eventid in your database. Is this the effect you want?
This thread is more than a year old. Please don't revive it unless you have something important to add.

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