Putting a SQL query in a PHP function - php

Question

I've got several queries I want to run on a single page. I obviously don't want to put the actual queries in my template file, so I think what I want to do is construct a function and call it wherever I want the query results to show up. Right?
So, for example, I'll have <?php sidebar_query()?> in the sidebar, <?php footer_query()?> in the footer, etc.
So, I just make a file called functions.php, do PHP include, and put something like this in there?
<?php
function sidebar_query(){
$query = ("SELECT sidebarposts FROM table;");
return $query;
}
?>
or do you use echo and not return anything?
<?php
function sidebar_query(){
$query = ("SELECT sidebarposts FROM table;");
echo $query;
}
?>
Along the exact same line, I'd like to count the results that get returned, and display a 'There were X posts returned!' message below. Seems like it would make sense to put this in a function too. How would I make a 'generic' function that I could reuse for each query?
<?php
function number_of_results(){
$num_rows = mysql_num_rows();
echo $num_rows;
}
?>
I'd be extremely grateful if someone could give me the theoretical gist of what I should be trying to achieve here.
Thanks for helping a beginner.
Terry

Answer 1

I think I get what you mean.
Return the value instead like this
function sidebar_query(){
$rValue = "";
$query = ("SELECT sidebarposts FROM table;");
$result = mysql_query($query);
if ($row = mysql_fetch_array($result)){
$rValue = $row['sidebarposts'];
}
return $rValue;
}
Now you can echo sidebar_query(); or whatever you want to do with it.

Answer 2

By doing ("SELECT sidebarposts FROM table;")you're not actually doing anything, you just have a string stored as a variable.
A simple example is
function sidebar_query()
{
$query = mysql_query("SELECT title,post FROM table;"); //query the db
$resArr = array(); //create the result array
while($row = mysql_fetch_assoc($query)) { //loop the rows returned from db
$resArr[] = $row; //add row to array
}
return $resArr;
}
Then to use it you can do
$sideBarPosts = sidebar_query(); //get the result array
foreach($sideBarPosts as $post) { //loop the array
echo '<h1>'. $post['title']. '</h1>';
echo '<p>'. $post['post']. '</p>';
}
EDIT. I see you want to let the function print it directly, you can do that instead of returning the array, if you like.

Answer 3

function sidebar_query(){
$query = mysql_query("SELECT * FROM table;");
$result = $conn->query($query);
$resArr = array(); //create the result array
while($row = $result->fetch_assoc()) { //loop the rows returned from db
$resArr[] = $row; //add row to array
}
return $resArr;
}
and that :
$sideBarPosts = sidebar_query(); //get the result array
foreach($sideBarPosts as $post) { //loop the array
echo '<h1>'. $post['title']. '</h1>';
echo '<p>'. $post['post']. '</p>';
}

Answer 4

// Set Connection with database
$conn = mysql_pconnect($servername,$username,$password) or die("Can not Connect MySql Server!");
// Select database you want to use
mysql_select_db($databasename,$conn) or die("Can not select Data Base!");
// When you want to query SQL inside php function, you need to pass connection($conn) to the function as below.
function sidebar_query($condb)
{
$strSql = "SELECT sidebarposts FROM table";
$result = mysql_query($strSql,$condb);
return $result;
}
// Call function
sidebar_query($conn);
This is work for me as i use with my webpage.

Answer 5

Read the php doc on how to run mysql query.
Yay you have the query, now you need to do something with it:
mysql_query($query); for example might work for you :-)

Answer 6

You want to run the query and return the result in whatever format you want to use in your template.. so for the raw number you want to return an integer, for the sidebar posts return an array of posts OR the mysql result.
You should make the "'There were X posts returned!' " thing a completely different function which you can pass in an integer an an optional string. This way you can reuse it for a ton of stuff. for example:
function format_nb_records($nb_records, $format = 'There were %s posts returned!'){
return sprintf($format, $nb_records);
}
Although in this case i dont think there is really enough extra logic to warrant wrapping it in a function. I would probably just do this directly in my template.
A good example of where something like this is useful is if you want to do "time in words" functionality like "Yesterday" or "10 minutes ago" then you would pass in the time calculate which string to use, format it and return it.

Answer 7

Although in this case i dont think there is really enough extra logic to warrant wrapping it in a function. I would probably just do this directly in my template.
A good example of where something like this is useful is if you want to do "time in words" functionality like "Yesterday" or "10 minutes ago" then you would pass in the time calculate which string to use, format it

Answer 8

You need to pass database connection name to function like this,
You already have a connection name, mine is $connect_name
$connect_name= mysql_connect( 'host', 'user', 'password');
function getname($user,$db){
$data= mysql_query("SELECT $user...", $db);
//your codes
//return bla bla
}
echo getname("matasoy",$connect_name);
This work for me.
I also use this for medoo.min sql system. You can use medoo with functions like this;
function randevu($tarih,$saat,$db){
$saat_varmi = $db->count("randevu",array("AND"=>array("tarih"=>$tarih,"saat"=>$saat)));
if($saat_varmi>0)
return 3;
else
return 2;
}
have a nice day, Murat ATASOY