Topic: PHP code returns blank

[manmanman]

Does anyone know why this code:

Code: [Select]

echo "<table>"
while($result = mysql_fetch_array($sql)) {
    echo "<tr>";
    echo "<th>Character Name:</th> <td>".$result['name'] . "</td></tr>";
    echo "<th>HP:</th> <td>".$result['mp'] . " </td></tr>";
    echo "<th>MP:</th> <td>" . $result['mp'] . " </td></tr>";
    echo "<th>EXP:</th> <td>" . $result['exp'] . " </td></tr>";
    echo "<th>SP:</th> <td>" . $result['sp'] . " </td></tr>";
}
echo "</table>"
returns a blank? If I remove the while, it works, but I want it executed multiple times if possible. How would I resolve this?

[techiefreak05]

did you already connect to the database?

[techiefreak05]

try this:

Code: [Select]

<?php
$query="SELECT * FROM `table` WHERE `column` = 'value' "; // Change to your own MySQL code

$query_results=mysql_query($query);

while($result=mysql_fetch_assoc($query_results)){
    echo "<table>";
    echo "<tr>"; 
    echo "<th>Character Name:</th> <td>".$result['name'] . "</td></tr>"; 
    echo "<th>HP:</th> <td>".$result['mp'] . " </td></tr>"; 
    echo "<th>MP:</th> <td>" . $result['mp'] . " </td></tr>"; 
    echo "<th>EXP:</th> <td>" . $result['exp'] . " </td></tr>"; 
    echo "<th>SP:</th> <td>" . $result['sp'] . " </td></tr>"; 
    echo "</table>";
 }
?>
just connect to the DB. and replace the sql query from above. ot your own and it should work.

Hope This Helps,
Brenden

[manmanman]

Yay! It works!

[Jenk]

echo your query to see that it is executing what you want it to.

Then change your mysql_connect/query/select_db function calls to suffix 'or die(mysql_error());' on the end, like so:

Code: [Select]

<?php
$result = mysql_query($query) or die(mysql_error());
?>

[manmanman]

I have another slight hitch: This code only returns one result. I clearly have two entries, but it only returns one.

[techiefreak05]

<?php
$query="SELECT * FROM `table` WHERE `column` = 'value' "; // Change to your own MySQL code

$query_results=mysql_query($query);

while($result=mysql_fetch_array($query_results)){
    echo "<table>";
    echo "<tr>";
    echo "<th>Character Name:</th> <td>".$result['name'] . "</td></tr>";
    echo "<th>HP:</th> <td>".$result['mp'] . " </td></tr>";
    echo "<th>MP:</th> <td>" . $result['mp'] . " </td></tr>";
    echo "<th>EXP:</th> <td>" . $result['exp'] . " </td></tr>";
    echo "<th>SP:</th> <td>" . $result['sp'] . " </td></tr>";
    echo "</table>";
 }
?>

try that.. the only thing i changed was.. "assoc" to "array" in mysql_fetch_array

[manmanman]

Still the same

[Ravi Kumar]

try the following.It should work.

Code: [Select]

<?php
$query="SELECT * FROM `table` WHERE `column` = 'value' "; // Change to your own MySQL code

$query_results=mysql_query($query);

while($result=mysql_fetch_array($query_results),MYSQL_NUM){
    echo "<table>";
    echo "<tr>";
    echo "<th>Character Name:</th> <td>".$result['name'] . "</td></tr>";
    echo "<th>HP:</th> <td>".$result['mp'] . " </td></tr>";
    echo "<th>MP:</th> <td>" . $result['mp'] . " </td></tr>";
    echo "<th>EXP:</th> <td>" . $result['exp'] . " </td></tr>";
    echo "<th>SP:</th> <td>" . $result['sp'] . " </td></tr>";
    echo "</table>";
 }
?>



[Jenk]

run the query manually in mysql command prompt/phpmyadmin/mysql administrator to see expected results.

Ravi - no, that will not work. You have specified for mysql_fetch_array to return a numerically indexed array, but then go on to use associative index's..

mysql_fetch_assoc() will do fine, changing to *_array was unecessary.

[Ravi Kumar]

sorry for the copy-paste error.

Code: [Select]

<?php
$query="SELECT * FROM `table` WHERE `column` = 'value' "; // Change to your own MySQL code

$query_results=mysql_query($query);

while($result=mysql_fetch_array($query_results,MYSQL_NUM)){
    echo "<table>";
    echo "<tr>";
    echo "<th>Character Name:</th> <td>".$result['name'] . "</td></tr>";
    echo "<th>HP:</th> <td>".$result['mp'] . " </td></tr>";
    echo "<th>MP:</th> <td>" . $result['mp'] . " </td></tr>";
    echo "<th>EXP:</th> <td>" . $result['exp'] . " </td></tr>";
    echo "<th>SP:</th> <td>" . $result['sp'] . " </td></tr>";
    echo "</table>";
 }
?>

the difference of my previous post and this post is "MYSQL_NUM" in inside mysql_fectch_array().


This is working for me!.
I am using this in my application.

[Jenk]

Ravi - no, that will not work. You have specified for mysql_fetch_array to return a numerically indexed array, but then go on to use associative index's..

still applies to your new example.

[Ravi Kumar]

In PHP user document it is written tht we can use either

mysql_fetch_array($query_results,MYSQL_NUM);

or

mysql_fectch_array($query_results,MYSQL_ASSOC);

in this case if we want to write code like

Code: [Select]

    echo "<tr>";
    echo "<th>Character Name:</th> <td>".$result['name'] . "</td></tr>";
    echo "<th>HP:</th> <td>".$result['mp'] . " </td></tr>";
    echo "<th>MP:</th> <td>" . $result['mp'] . " </td></tr>";
    echo "<th>EXP:</th> <td>" . $result['exp'] . " </td></tr>";
    echo "<th>SP:</th> <td>" . $result['sp'] . " </td></tr>";
    echo "</table>";
}

we need to use while($result=mysql_fetch_array($query_results,MYSQL_ASSOC)).

This is working fine in my application.

[Jenk]

Correct, then why did you post MYSQL_NUM in your examples?

Also worth noting thatmysql_fetch_assoc($result); achieves the same functionality as mysql_fetch_array($result, MYSQL_ASSOC);

[redarrow]

jenk was trying to show you the easy way as you can see from jenk last post.

the whole idear of computer programming is to not write a lot but as little to get a code to work.

please take as much notice as possable to members posts as your benifit from it ok.

good luck.

example

long way for assoc in fact your turning an array into a assoc so the short example is a lot faster and smarter way to code.

Code: [Select]

<?php
mysql_fetch_array($result, MYSQL_ASSOC);
?>

short way

Code: [Select]

<?php
mysql_fetch_assoc($result);
?>


[manmanman]

I just realised something:

while($result = mysql_fetch_array($result)) {
    

echo "<table border='1'>";
        echo "<tr>"; 
        echo "<th>Character Name:</th> <td>".$result['name'] . "</td></tr>"; 
        echo "<th>HP:</th> <td>".$result['mp'] . " </td></tr>"; 
        echo "<th>MP:</th> <td>" . $result['mp'] . " </td></tr>"; 
        echo "<th>EXP:</th> <td>" . $result['exp'] . " </td></tr>"; 
        echo "<th>SP:</th> <td>" . $result['sp'] . " </td></tr>";

echo "</table>";  
    }

was my original code. I realised this: while($result = mysql_fetch_array($result)) {

I changed it to: while($get_result = mysql_fetch_array($result)) {

And now it works.