I am no programmer and could really use some help in configuring a query below such that it will run for each element in an array and finally add the queried data to the 'mArray'.
Below is two examples of the queries I am running. I have many more of these so it would be much more practical to include all of the ID's in an array and run a foreach loop based on the number of array elements.
$sth = mysqli_query($conn, "SELECT * FROM {$tableName} WHERE ID = 'List1'");
$list1Array = array();
while($r = mysqli_fetch_array($sth)) {
For ($n = 1; $n <= $CI_NOYEARS; $n++){
$list1Array['data'][] = $r[$n];
}
}
$sth = mysqli_query($conn, "SELECT * FROM {$tableName} WHERE ID = 'List2'");
$list2Array = array();
while($r = mysqli_fetch_assoc($sth)) {
For ($n = 1; $n <= $CI_NOYEARS; $n++){
$list2Array['data'][] = $r[$n];
}
}
$mArray = array();
$mArray['list1'] = $list1Array;
$mArray['list2'] = $list2Array;
I have been trying to create this using a simple array and foreach statement as below. However, I just can't seem to make this work. Any help is much appreciated.
$idArray = array(
"List1",
"List2",
);
foreach($idArray as $val) {
$sth = mysqli_query($conn, "SELECT * FROM {$tableName} WHERE ID = $val");
$yearsArray = array(); // Not sure what to do here
while($r = mysqli_fetch_array($sth)) {
For ($n = 1; $n <= $CI_NOYEARS; $n++){
$yearsArray['data'][] = $r[$n]; // Again not sure what to do here
}
}
}
Related
I need to store service_ids and country_ids in an array in this format
array
[0]["service_id"] should give service id at 0th
index
array[0]["country_id"] should give me country id at 0th index and so on.
function service_ids($conn) {
$ids = array();
$sql = "SELECT id from services";
$result = $conn->query($sql);
while($row = $result->fetch_assoc()) {
array_push($ids, $row["id"]);
}
return $ids;
}
$service_ids = service_ids($conn);
function country_ids($conn) {
$ids = array();
$sql = "SELECT id FROM countries";
$result = $conn->query($sql);
while($row = $result->fetch_assoc()) {
array_push($ids, $row["id"]);
}
return $ids;
}
$country_ids = country_ids($conn);
`//I am having problem here how to store it.
$z = array();
for ($i=0; $i < count($service_ids); $i++) {
$z = array(`
array("service_id"=>$service_ids[$i], "country_id"=>$country_ids[$i])
);
}
print_r($z);
?>
You are basically overwriting array in each iteration in final loop, instead of that store new array in new array index
$z = array();
$counter = 0;
for ($i=0; $i < count($service_ids); $i++) {
$counter = count($z);
$z[$counter]["service_id"] = $service_ids[$i];
$z[$counter]["country_id"] = $country_ids[$i];
}
I have an array of ID's used to execute mysqli queries in a foreach loop (the below code is just an example - the array will contain more than 50+ elements/ID's). For each array element/ID I query an array which I then include in a compData array. However, I am unsure of how to dynamically define the arrays in the foreach loop. I would very much appreciate if you can check whether I am using ${$val} correctly in the below or if something else is wrong. Thanks.
$idArray = array(
"List1",
"List2",
);
$compData = array();
foreach($idArray as $val) {
$sth = mysqli_query($conn, "SELECT * FROM {$tableName} WHERE ID = {$val}");
${$val} = array();
while($r = mysqli_fetch_array($sth)) {
For ($n = 1; $n <= $CI_NOYEARS; $n++){
${$val}['data'][] = $r[$n];
}
}
$compData[{$val}] = ${$val}
}
foreach($compData['List1'] as $result) {
For ($n = 0; $n <= $CI_NOYEARS; $n++){
echo $result[$n];
}
}
The above code does not work and does not echo any data from the $compData array. Below is an example that works just fine where I execute the code using the ID's directly.
$sth = mysqli_query($conn, "SELECT * FROM {$tableName} WHERE ID = 'List1'");
$List1 = array();
while($r = mysqli_fetch_array($sth)) {
For ($n = 1; $n <= $CI_NOYEARS; $n++){
$List1['data'][] = $r[$n];
}
}
$companyData = array();
$companyData['List1'] = $List1;
foreach($compData['List1'] as $result) {
For ($n = 0; $n <= $CI_NOYEARS; $n++){
echo $result[$n];
}
}
It's a bit tough figuring out what your goal is based on the code you provided, but it seems far more complicated than it needs to be. I think what I've got here will replicate your desired output.
You should also be using prepared statements; they are safer, and take a lot of the overhead out of database queries when you're going to be repeating the same query multiple times. I've implemented them here.
$idArray = ["List1", "List2"];
$sth = $conn->prepare("SELECT * FROM `$tableName` WHERE ID = ?");
foreach($idArray as $val) {
$data = [];
$sth->bind_param("s", $val);
$sth->execute();
$result = $sth->get_result();
while ($r = $result->fetch_array()) {
$data = array_merge($data, array_splice($r, 1, $CI_NOYEARS));
}
$compData[$val]["data"] = $data;
}
foreach($compData["List1"]["data"] as $result) {
echo $result;
}
I don't understand why you're using that curly-brace notation at all when you're just copying it over into a multidimensional compData array anyway? Why not just directly put the data into the array:
for ($n = 1; $n <= $CI_NOYEARS; $n++) {
$compdata[$val]['data'][] = $r[$n];
}
(You'll also need to declare it as an array at the top level of the foreach of course.)
Side note: I would suggest not interpolating data directly into your query string like that, and instead using bound parameters: http://php.net/manual/en/mysqli-stmt.bind-param.php It's much more secure.
I have set up an array called $compData by importing data from MySql and pushing two separate arrays called $yearsArray and $salesArray into $compData. Before pushing these two arrays to $compData I have first set their ['name'] to 'Year' and 'Sales', respectively. The code for this is included below.
$sth = mysqli_query($conn, "SELECT * FROM {$tableName} WHERE ID = 'ID_YEAR'");
$yearsArray = array();
$yearsArray['name'] = 'Year';
while($r = mysqli_fetch_array($sth)) {
For ($n = 1; $n <= $CI_YEARS; $n++){
$yearsArray['data'][] = $r["Year$n"];
}
}
$sth = mysqli_query($conn, "SELECT * FROM {$tableName} WHERE ID = 'IS_SALES'");
$salesArray = array();
$salesArray['name'] = 'Sales';
while($rr = mysqli_fetch_assoc($sth)) {
For ($n = 1; $n <= $CI_YEARS; $n++){
$salesArray['data'][] = $rr["Year$n"];
}
}
$compData = array();
array_push($compData,$yearsArray); // 0
array_push($compData,$salesArray); // 1
Now I want to access and echo the data in $compData by using the code below, but this doesn't work. I am not very comfortable with PHP and am wondering if I am not using the ['Year'] and ['Sales'] identifiers correctly. Any help is much appreciated.
foreach($compData['Year'] as $result) {
echo $result, '<br>';
}
foreach($compData['Sales'] as $result) {
echo $result, '<br>';
}
You've set 'Year' as the value of key 'name', but try to use it as key (of another array).
Now you have
echo $compData[0]['name']; // -> 'Year'
echo $compData[1]['name']; // -> 'Sales'
You probably want
$compData = array();
$compData['Year'] = $yearsArray;
$compData['Sales'] = $salesArray;
instead of the array_push..
I have a $nr variable that as the number of arrays with the same name that i created in a previous function, something like this:
$var = 'sorteios_'.$nr;
$$var = array($sorteio_id);
I have it in a While function so it was created something like 3 arrays with the names:
$sorteios_1 , $sorteios_2 , $sorteios_3
And i want to add them inside an array_merge, so i have to use the $nr that says how many arrays with the same name were created.
$nr = 3;
i want that the final result looks something like this.
$result = array_merge($sorteios_1, $sorteios_2, $sorteios_3);
That's the whole function if you want to check it (it's not complete because of the problem i'm having):
function check_sorteios(){
global $db;
$id = $_SESSION['userid'];
$query1 = "SELECT * FROM sorteios WHERE userid = $id";
$result1 = $db->query($query1);
$count = $result1->rowCount();
if ($count == 0){ $sorteios = 0; echo "sem sorteios";}
else{
$numero = 0;
$sorteios = 0;
$nr = 0;
while($row1 = $result1->fetch()){
if ( $numero == $count ){ return 0;}
$numero++;
$sorteio_id = $row1['id'];
$query2 = "SELECT * FROM productos WHERE id = $sorteio_id";
$result2 = $db->query($query2);
while($row2 = $result2->fetch()){
$data = $row2['data'];
$titulo = $row2['titulo'];
if (strtotime($data) > time()){
if(!isset($$sorteio_id)){
$$sorteio_id = 1;
}
$nr++;
$var = 'sorteios_'.$nr;
$$var = array($sorteio_id);
}
}
}
}
$result = array_merge($sorteios_1, $sorteios_2, $sorteios_3);
$occurences = array_count_values($result);
print_r($occurences);
}
You could try to create a string containing the code executing array_merge of all your arrays and then pass it to the eval function (http://it1.php.net/manual/it/function.eval.php)...
Something like this:
$str="\$result=array_merge(";
for($i=1;$i<=$nr;$i++){
$str.="\$sorteios_$i,";
}
$str=substr($str,0,-1);
$str.=");";
eval($str);
Then in $result you have what you need.
Is there a reason you can't recursively merge?
if ($nr > 0) {
$result = $sorteios_1;
for ($i = 2; $i <= $nr; ++$i) {
$result = array_merge($result, ${'sorteios_'.$i});
}
} else {
// you might want to handle this case differently
$result = array();
}
$result = mysql_query($query);
$filter = array();
while($r = mysql_fetch_array($result))
{
for ( $i = 0; $i<20; $i++)
{
$filter[] = $r["name"][$i];
}
$name = implode(",", $filter);
}
Above is a portion of main code. I want to restrict loop to run only 20 times. if above 20 it should omit...but this gives me some odd result...I know some where I made a mistake but where?
mysql_fetch_array only fetches a single row of data from the query results. It looks like you're trying to fetch only a single field from the results, so you'd want something like this:
$i = 0;
while($row = $mysql_fetch_assoc($result)) {
$i++
if ($i >= 20) {
break;
}
$filter[] = $row['name'];
}
$name = implode(",", $filter);
But this is very inefficient. Why not have MySQL do the row-limiting itself?
SELECT your,fields,here
FROM yourtable
WHERE ...
ORDER BY ...
LIMIT 20
and then you only get 20 rows to start with, without forcing mysql to fetch all however-many-there-are-beyond-20.
You are not advancing to the next row
$result = mysql_query($query);
$filter = array();
$i = 0;
while($r = mysql_fetch_array($result))
{
$filter[] = $r["name"][$i]; }
$name = implode(",", $filter);
if(++$i == 20)
{
break;
}
}