Question

PHP MySQL Query

Asked by: Joel_Sisko

Dear experts,

I need help on some PHP and MySQL query. I am using Flex and have the basic query working and returning the information to my data grid just fine. I need to refine my search to limit the number of records returned; my current code returns all the records.

I need to have a query that will return the records from the logs table where the channel equals some variable and where the date equals some variable and where the time equals some variable.

So I would have a simple form that would have the three text boxes one for each variable. I need to take those values and POST them to a php file that in return would use them within the query. The result would then bind to my data grid as it does now.
 
So to clarify what I need help with is the query using the values I need to send via POST.
Thanks for the help,

Joel

<?php 
    /* LogQuery.php */ 
 
    class LogQuery { 
        public function getAllItems() { 
            $connection = mysqli_connect("localhost", "root", "password", 
                            "logs", "3306") or die(mysqli_connect_error()); 
            $sql = "SELECT * FROM logs"; 
            $result = mysqli_query($connection, $sql) or 
                die('Query failed: ' . mysqli_error($connection)); 
 
            $rows = array(); 
            while ($row = mysqli_fetch_object($result)) { 
                $rows[] = $row; 
            } 
 
            mysqli_free_result($result); 
            mysqli_close($connection); 
 
            return $rows; 
        } 
    } 
?>

                                  
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Asked On
2009-09-23 at 10:34:40ID24755806
Tags

PHP MYSQL Query

Topics

PHP Scripting Language

,

MySQL Server

,

Databases Miscellaneous

Participating Experts
1
Points
500
Comments
6

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Answers

 

by: andoneknightPosted on 2009-09-23 at 10:47:33ID: 25405852

$chanPost = mysqli_real_escape_string($_POST['channel']);
$datePost = mysqli_real_escape_string($_POST['date']);
$timePost = mysqli_real_escape_string($_POST['time']);

$sql = "SELECT * FROM logs WHERE channel = '$chanPost' AND date = '$datePost' AND time = '$timePost'";

This should suffice for your question

 

by: Joel_SiskoPosted on 2009-09-23 at 11:05:01ID: 25406034

Looks like I can work with that (was not to sure on the format, problem being a hack at programming :)

Thanks for the quick response. One minor question, should I not be able to place the variable information at the top of the php file I have already? If so what would the correct POST url look like?

Joel

 

by: andoneknightPosted on 2009-09-23 at 11:19:53ID: 25406196

You can place the POST variables anywhere you like :-) (As long as it's before the SQL query).

The post is the same as i have above (except for the escape string)

i.e. $var = $_POST['postedvariable'];

The escape string is basically to make sure its safe to use the data in an sql query

 

by: Joel_SiskoPosted on 2009-09-23 at 11:35:36ID: 25406364

So would it look like this then? BTW I figured out my answer to what the url would like.

Joel

<?php 
    /* LogQuery.php */ 
 
 
$ chanPost = $_POST[' chanPost '];
$ datePost = $_POST[' datePost '];
$ timePost = $_POST[' timePost '];
 
 
$chanPost = mysqli_real_escape_string($_POST['channel']); 
$datePost = mysqli_real_escape_string($_POST['date']);
$timePost = mysqli_real_escape_string($_POST['time']);
 
class LogQuery { 
       
public function getAllItems() { 
            $connection = mysqli_connect("localhost", "root", "password", 
                            "logs", "3306") or die(mysqli_connect_error()); 
$sql = $sql = "SELECT * FROM logs WHERE channel = '$chanPost' AND date = '$datePost' AND time = '$timePost'";
            $result = mysqli_query($connection, $sql) or 
                die('Query failed: ' . mysqli_error($connection)); 
 
            $rows = array(); 
            while ($row = mysqli_fetch_object($result)) { 
                $rows[] = $row; 
            } 
 
            mysqli_free_result($result); 
            mysqli_close($connection); 
 
            return $rows; 
        } 
    } 
?>
                                              
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by: andoneknightPosted on 2009-09-23 at 11:58:23ID: 25406615

Not quite -
Make sure that there are no spaces after the "$" signs and in the post value. The value between the POST is the NAME of the form element from the previous page. So if you have a text input for a phone number and the name of that field is "userNumber" then the post request would be  $_POST['userNumber']. So:

$chanPost = $_POST['channel'];
$datePost = $_POST['date'];
$timePost = $_POST['time'];
 
$chanPost = mysqli_real_escape_string($chanPost);
$datePost = mysqli_real_escape_string($datePost);
$timePost = mysqli_real_escape_string($timePost);

Or just use the posted values directly in the escape string if you dont want to do anything else with them. Note that there is much more you can do with posted values - like checking formats, values etc and that normal you might not want to use them directly in a query.

 

by: Joel_SiskoPosted on 2009-09-23 at 12:03:45ID: 25406671

Great thanks for the info...yeah I will work on validation of the data next....for me I have to crawl walk run.

Joel

20120131-EE-VQP-002

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