make php function with two different mysql command - php

Question

I want to create a function so that I won't repeat myself.
This is my current code
<?php
$targetpage = "index.php";
$limit = 20;
$sql1 = $db->prepare("SELECT * FROM classified ORDER BY date DESC");
/*** fetch Number of results ***/
$total_pages =$sql1->rowCount();
$stages = 3;
$page = ($_GET['page']);
if($page){
$start = ($page - 1) * $limit;
}else{
$start = 0;
}
$sql = $db->prepare("SELECT * FROM classified ORDER BY date DESC LIMIT $start,
$limit ")or die(print_r($sql->errorInfo(), true));
$sql->execute();
$result = $sql->fetchAll();
//Include pagination
require_once("pagination.php");
// pagination
echo $paginate;
foreach($result as $row){
$id = htmlentities($row['id'], ENT_QUOTES);
$id_city = htmlentities($row['id_city'], ENT_QUOTES);
$title = htmlentities($row['title'], ENT_QUOTES ,'utf-8');
$querya = $db->prepare("SELECT * FROM city WHERE id = :id_city");
/*** bind the paramaters ***/
$querya->bindParam(':id_city', $id_city, PDO::PARAM_INT);
/*** execute the prepared statement ***/
$querya->execute();
/*** fetch the results ***/
$resultya = $querya->fetchAll();
foreach($resultya as $rowa)
{
$city_name = htmlentities($rowa['city'], ENT_QUOTES, 'utf-8');
}
}
?>
Now I have another file that uses the same code except it has a condition when retrieving data from database.
So instead of:
$sql1 = $db->prepare("SELECT * FROM classified ORDER BY date DESC");
$sql = $db->prepare("SELECT * FROM classified ORDER BY date DESC LIMIT $start,
$limit ")or die(print_r($sql->errorInfo(), true));
The other file:
$sql1 = $db->prepare("SELECT * FROM classified where type = '1' ORDER BY date DESC");
$sql = $db->prepare("SELECT * FROM classified where type = '1' ORDER BY date DESC
LIMIT $start, $limit ")or die(print_r($sql->errorInfo(), true));
The difference is where type = 1
Is it possible to combine all this in one function?
Thanks

Answer 1

I added some notes into the code, does this make sense?
See below:
<?php
/*
$db - PDO object
$limit - number of listings to show on the page
$page - page to show
$where - the additional where condition to pass in
*/
function getItems($db=null,$limit=20,$page='',$where='') {
// check if $db exists before doing anything
if ($db) {
$sql1 = $db->prepare("SELECT * FROM classified ORDER BY date DESC");
/*** fetch Number of results ***/
$total_pages =$sql1->rowCount();
$stages = 3;
if($page){
$start = ($page - 1) * $limit;
}else{
$start = 0;
}
$sql = $db->prepare("SELECT * FROM classified $where ORDER BY date DESC LIMIT $start,
$limit ")or die(print_r($sql->errorInfo(), true));
$sql->execute();
$result = $sql->fetchAll();
} else {
// I return an empty array here so that if something should fail $result will still be populated with an array
return array();
}
}
$targetpage = "index.php";
$result = getItems($db,20,$_GET['page'],'where type = "1"');
//Include pagination
require_once("pagination.php");
// pagination
echo $paginate;
foreach($result as $row){
$id = htmlentities($row['id'], ENT_QUOTES);
$id_city = htmlentities($row['id_city'], ENT_QUOTES);
$title = htmlentities($row['title'], ENT_QUOTES ,'utf-8');
$querya = $db->prepare("SELECT * FROM city WHERE id = :id_city");
/*** bind the paramaters ***/
$querya->bindParam(':id_city', $id_city, PDO::PARAM_INT);
/*** execute the prepared statement ***/
$querya->execute();
/*** fetch the results ***/
$resultya = $querya->fetchAll();
foreach ($resultya as $rowa) {
$city_name = htmlentities($rowa['city'], ENT_QUOTES, 'utf-8');
}
}
?>

Answer 2

Yes. Have one file and either send a POST or GET to it that tells the page if type==1.
Example
if ($_GET['t']==1){ $type = "WHERE type = '1'"; }else{ $type = ""; }
$sql1 = $db->prepare("SELECT * FROM classified " . $type . " ORDER BY date DESC");
$sql = $db->prepare("SELECT * FROM classified " . $type . " ORDER BY date DESC
LIMIT $start, $limit ")or die(print_r($sql->errorInfo(), true));
If you call the page this is listed on with page.php?t=1, then it will put the where statement in there. If you just call page.php, it will not put anything there.