PDO PHP Adding "AND" in BetweenPlaceholders - php

Question

I would like to add " AND " in between the key and value pair arguments for my sql query but I don't know how. I have tried search the net but unable to find a solution.
$cdatahome = fetchCategory(array("status"=>"1","home"=>"1"));
function fetchCategory(array $conditions){
$db = Core::getInstance();
$sql = "SELECT id, title FROM ruj_category WHERE ";
$params = array();
foreach ($conditions as $column => $value) {
if (preg_match('/^[a-z-.]+$/', $column)) {
$sql .= "$column = ?";
$params[] = $value;
}
}
$sql .= " order by title asc";
$res = $db->dbh->prepare($sql);
$res->execute(array_values($params));
$res = $res->fetchAll(PDO::FETCH_ASSOC);
return $res;

Answer 1

$where = array();
foreach ($conditions as $column => $value) {
if (preg_match('/^[a-z-.]+$/', $column)) {
$where[] = "$column = ?";
$params[] = $value;
}
}
$sql .= implode(' AND ', $where);

Answer 2

$cdatahome = fetchCategory(array("status"=>"1","home"=>"1"));
function fetchCategory(array $conditions){
$db = Core::getInstance();
$sql = "SELECT id, title FROM ruj_category WHERE ";
$params = array();
$i = 0;
foreach ($conditions as $column => $value) {
if (preg_match('/^[a-z-.]+$/', $column)) {
if($i != 0){
$sql .= ' AND ';
}
$sql .= "$column = ?";
$params[] = $value;
$i++;
}
}
$sql .= " order by title asc";
$res = $db->dbh->prepare($sql);
$res->execute(array_values($params));
$res = $res->fetchAll(PDO::FETCH_ASSOC);
return $res;

Answer 3

Usually, when I want to put something like AND or & (in the case of URLs), I create an array and implode it on the string I want in the middle. For example:
$items = array("a", "b", "c");
$output = implode(" AND ", $items);
Outputs:
"a AND b AND c"
In your case, you can do your foreach loop to build the string pieces and then use AND as glue in the implode() function as listed out by the second answer.

Answer 4

First, you could put the conditions into an array, as you do with the values to $params. Like $cond[]="$column = ?" and then $sql.=implode(' AND ',$cond);
To have it solved in your foreach: before the loop set $first=false; and in the loop do $sql.=($first?'':' AND ')."$column = ?"; $first=false;