Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Trying to construct an sql query string

Posted on 2007-04-08
3
Medium Priority
?
246 Views
Last Modified: 2012-05-05
Hello,

I am making a section for my handmade themes on my site(anyway this is not the point). I am trying to construct a sql_query string but the output is mostly 0 I am not new to php but probably I am missing something out in the crowd... The below code explains almost everything:

<?php

include "database_connection_general.inc";
      $property_id = "2";
      // I need to get theme ids which has a property_id = 2
      $sql_theme_id_get = mysql_query("SELECT theme_id FROM theme_property_relation WHERE property_id='$property_id'");
      while ($row = mysql_fetch_array($sql_theme_id_get)) {
          $theme_id = $row["theme_id"];
            $sql_tail_query += "theme_id='$theme_id' AND ";
      }

            $sql_head_query = "SELECT * FROM theme WHERE "; // adding the head part for the query
            $sql_extended_query = $sql_head_query + $sql_tail_query; // adding the tail part but there is a "AND " at the end that must be cropped!!!
            $sql_total_query = substr($sql_extended_query, 0, -4); // cropping the last 4 characters "AND "
            $sql_final_query = $sql_total_query + " ORDER BY theme_added DESC LIMIT 0 , 10"; // adding the order part
            
            echo "$sql_final_query";

            /* Output should be like:
            SELECT * FROM theme WHERE theme_id='2' AND theme_id='15' AND theme_id='74' AND theme_id='103' ORDER BY theme_added DESC LIMIT 0 , 10
            
            but getting 0
            */
      
?>

Thank you,
0
Comment
Question by:cemlouis
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 51

Accepted Solution

by:
Steve Bink earned 1000 total points
ID: 18872459
String concatenation is done with the period.

            $sql_head_query = "SELECT * FROM theme WHERE "; // adding the head part for the query
            $sql_extended_query = $sql_head_query . $sql_tail_query; // adding the tail part but there is a "AND " at the end that must be cropped!!!
            $sql_total_query = substr($sql_extended_query, 0, -4); // cropping the last 4 characters "AND "
            $sql_final_query = $sql_total_query . " ORDER BY theme_added DESC LIMIT 0 , 10"; // adding the order part
0
 
LVL 51

Expert Comment

by:Steve Bink
ID: 18872461
Also:

 $sql_tail_query .= "theme_id='$theme_id' AND ";
0
 

Author Comment

by:cemlouis
ID: 18872474
Hello routinet,

thank you, I get ashamed of making this mistake :( I am messing with C# these days probably that's the source of the mistake...

Regards,
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Part of the Global Positioning System A geocode (https://developers.google.com/maps/documentation/geocoding/) is the major subset of a GPS coordinate (http://en.wikipedia.org/wiki/Global_Positioning_System), the other parts being the altitude and t…
Many old projects have bad code, but the budget doesn't exist to rewrite the codebase. You can update this code to be safer by introducing contemporary input validation, sanitation, and safer database queries.
The viewer will learn how to count occurrences of each item in an array.
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …
Suggested Courses

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question