I have been looking around for PHP tutorials and I found a very detailed one that have been useful to me.
But now, I have a question. The results showed by the API are stored into a $results array. This is the code (for instance):
$fetch = mysql_fetch_row($go);
$return = Array($fetch[0],$fetch[1]);
$results = Array(
'news' => Array (
'id' => $return[0],
'title' => $return[1]
));
My question is.. I want to display the last 10 news.. how do I do this? On normal PHP / mySQL it can be done as:
while($var = mysql_fetch_array($table)) {
echo "do something"
}
How can I make it so the $results can print multiple results?
I have tried like:
while($var = mysql_fetch_array($table)) {
$results = Array(
'news' => Array (
'id' => $return[0],
'title' => $return[1]
));
}
But this only shows me one result. If I change the $results .= Array(...) it gives error.
What can I do?
Thanks!
Edit
My function to read it doesn't read when I put it the suggested way:
function write(XMLWriter $xml, $data){
foreach($data as $key => $value){
if(is_array($value)){
$xml->startElement($key);
write($xml, $value);
$xml->endElement();
continue;
}
$xml->writeElement($key, $value);
}
}
write($xml, $results);
$results[] = Array(
'news' => Array (
'id' => $return[0],
'title' => $return[1]
));
That should do it.
If you are familiar with arrays, this is the equivalent of an array_push();
array_push() treats array as a stack, and pushes the passed variables onto the end of array. The length of array increases by the number of variables pushed. Has the same effect as:
<?php
$array[] = $var;
?>
Use [] to add elements to an array:
$results = array();
while($var = mysql_fetch_array($table)) {
$results[] = Array(
'news' => Array (
'id' => $var[0],
'title' => $var[1]
));
}
}
You can then loop through the $results array. It's not an optimal structure but you should get the hang of it with this.
Related
I have an array like:
$array = array(
'name' => 'Humphrey',
'email' => 'humphrey#wilkins.com
);
This is retrieved through a function that gets from the database. If there is more than one result retrieved, it looks like:
$array = array(
[0] => array(
'name' => 'Humphrey1',
'email' => 'humphrey1#wilkins.com'
),
[1] => array(
'name' => 'Humphrey2',
'email' => 'humphrey2#wilkins.com'
)
);
If the second is returned, I can do a simple foreach($array as $key => $person), but if there is only one result returned (the first example), I can't run a foreach on this as I need to access like: $person['name'] within the foreach loop.
Is there any way to make the one result believe its a multidimensional array?
Try this :
if(!is_array($array[0])) {
$new_array[] = $array;
$array = $new_array;
}
I would highly recommended making your data's structure the same regardless of how many elements are returned. It will help log terms and this will have to be done anywhere that function is called which seems like a waste.
You can check if a key exists and do some logic based on that condition.
if(array_key_exists("name", $array){
//There is one result
$array['name']; //...
} else {
//More then one
foreach($array as $k => $v){
//Do logic
}
}
You will have the keys in the first instance in the second yours keys would be the index.
Based on this, try:
function isAssoc(array $arr)
{
if (array() === $arr) return false;
return array_keys($arr) !== range(0, count($arr) - 1);
}
if(isAssoc($array)){
$array[] = $array;
}
First check if the array key 'name' exists in the given array.
If it does, then it isn't a multi-dimensional array.
Here's how you can make it multi-dimensional:
if(array_key_exists("name",$array))
{
$array = array($array);
}
Now you can loop through the array assuming it's a multidimensional array.
foreach($array as $key => $person)
{
$name = $person['name'];
echo $name;
}
The reason of this is probably because you use either fetch() or fetchAll() on your db. Anyway there are solutions that uses some tricks like:
$arr = !is_array($arr[0]) ? $arr : $arr[0];
or
is_array($arr[0]) && ($arr = $arr[0]);
but there is other option with array_walk_recursive()
$array = array(
array(
'name' => 'Humphrey1',
'email' => 'humphrey1#wilkins.com'
),
array(
'name' => 'Humphrey2',
'email' => 'humphrey2#wilkins.com'
)
);
$array2 = array(
'name' => 'Humphrey2',
'email' => 'humphrey2#wilkins.com'
);
$print = function ($item, $key) {
echo $key . $item .'<br>';
};
array_walk_recursive($array, $print);
array_walk_recursive($array2, $print);
I have a PHP array like this:
$arr = array(
'id' => 'app.settings.value.id',
'title' => 'app.settings.value.title',
'user' => 'app.settings.value.user'
);
I want to remove '.id', '.title' and '.user' in the array values. I want to insert the key of this array at the end of the value. I know, that I can get an array key by passing an array and a value to 'array_search', but I want the key within this one array definition - at the end of it's value. Is this possible?
I don't like this, but I guess it's simple and works:
$arr = array(
'id' => 'app.settings.value',
'title' => 'app.settings.value',
'user' => 'app.settings.value'
);
$result = array();
foreach ($arr AS $key => $value) {
$result[$key] = $value . '.' . $key;
}
You're storing app.settings.value which is the same for all array items, so personally I'd prefer:
$arr = array(
'id',
'title',
'user'
);
function prepend_key($key)
{
return 'app.settings.value.' . $key;
}
$result = array_map('prepend_key', $arr);
With $result containing:
array(
'app.settings.value.id',
'app.settings.value.title',
'app.settings.value.user'
);
At the end of the day, either works :)
I am trying to make a dynamic JSON array in PHP, however when I try to do so it returns "Array". Here is the code I am currently using:
<?php
require '../../scripts/connect.php';
$array = '';
if($result = $db->query("SELECT * FROM art") or die ($db->error)){
if($count = $result->num_rows) {
while($row = $result->fetch_object()){
$array .= array(
'title' => $row->title,
'image' => "http://www.thewebsite.com/img/2.jpg",
'rating' => 7.7,
'releaseYear' => 2003,
'genre' => array(
'0' => $row->category,
'1' => $row->subcategory
)
);
}
}
}
echo json_encode($array);
?>
Can anyone suggest how I might go about fixing this?
And if anyone has suggestions about creating a dynamic JSON array, some help would be much appreciated.
Change your declaration of $array to be an array:
$array = array();
Then in your while loop, when you add the new array to $array, push it like this:
$array[] = array('title'=>$row->title, etc...)
First, im new in PHP so please bear with me.
I just want to add an array with the foreach loop but I can't.
if($size > 0)
{
$resultArray = array();
foreach($result as $hospital)
{
if($hospital)
{
$temp = array('result' => 'true',
'total' => $size,
'id' => $hospital['id'],
'name' => $hospital['name'],
'address' => $hospital['address'],
'telp' => $hospital['telp']);
$resultArray = array_merge_recursive($resultArray, $temp);
//$resultArray = array_splice($resultArray, $i, 0, $temp);
}
}
$this->response($resultArray, 200);
}
I tried to create a $temp array and merge it to the final result, and finally print that final result ($resultArray) to the response.
The array is successfully merged, but not in the way i want. This is the JSON result :
{"result":["true","true"],"total":[2,2],"id":["1","2"],"name":["test","keyword"],"address":["alamat test","alamat keyword"],"telp":["123456","789"]}
What i want is something like this :
-0 :{
result: "true"
total: 2
id: "1"
name: "test"
address: "alamat test"
telp: "123456"
}
-1 :{
result: "true"
total: 2
id: "2"
name: "test2"
address: "alamat tes 2t"
telp: "789"
}
So the response should be an array with 2 items, and each items has some items.
Please kindly help me, Thanks for your help.
It looks to me like you're trying to append an array, to an array, which can be done quite easily:
$resultArray = array();//outside the loop
//loop
$resultArray[] = array(
'result' => 'true',
'total' => $size,
'id' => $hospital['id'],
'name' => $hospital['name'],
'address' => $hospital['address'],
'telp' => $hospital['telp']
);
Job done. You could also use the array_push function, but that's a function. Functions equal overhead, and should, therefore be avoided (if it doesn't affect code readability). You use array_merge and array_merge_recursive if you want to combine arrays:
$foo = array(
array('bar' => 'zar')
);
$bar = array(
array('car' => 'far')
);
var_dump(
array_merge(
$foo,
$bar
)
);
The effect of array_merge here is comparable to:
foreach ($bar as $subArray)
$foo[] = $subArray;
Im not totally sure how you want your final array to be, but this will put it like $resultArray[0] = array( //temparray ) etc..:
if($size > 0){
$resultArray = array();
$i=0;
foreach($result as $hospital){
if($hospital){
$temp = array('result' => 'true',
'total' => $size,
'id' => $hospital['id'],
'name' => $hospital['name'],
'address' => $hospital['address'],
'telp' => $hospital['telp']);
$resultArray[$i][$temp];
$i++;
}
}
$this->response($resultArray, 200);
}
Replace this -
$resultArray = array_merge_recursive($resultArray, $temp);
With this -
$resultArray[] = $temp;
I have an array that looks like this:
array
0 =>
array
'title' => string 'Ireland - Wikipedia, the free encyclopedia'
'url' => string 'http://en.wikipedia.org/wiki/Ireland'
1 =>
array
'title' => string 'Ireland's home for accommodation, activities.'
'url' => string 'http://www.ireland.com/'
that I want to add a score of 0 to each element. I thought this simple foreach loop would do the trick but...well....it doesn't :/
public function setScore($result)
{
foreach($result as $key)
{
$key = array('title', 'url', 'score' => 0);
}
return $result;
}
Can someone help me out?
Thanks
foreach works on a copy of the array. You can modify $key all you want, it's not going to reflect on the original array.
You can use $key by reference though, then it'll work as expected:
foreach ($result as &$value) {
$value['score'] = 0;
}
Manual entry: http://php.net/manual/en/control-structures.foreach.php
You create a new array here and do nothing with it:
foreach($result as $key){
$key = array('title', 'url', 'score' => 0);
}
What you want to do is to modify a reference to existing one:
foreach($result as &$key){ # Note the '&' here
$key['score'] = 0;
}
Although deceze is right, you can also do this using array_walk(), like this:
array_walk( $result, function( &$el) { $el['score'] = 0; });
Here's an example of how to accomplish this.
$array = array( array( 'title' => "Ireland - Wikipedia, the free encyclopedia", 'url' => "http://en.wikipedia.org/wiki/Ireland"), array( 'title' => "Ireland's home for accommodation, activities.", 'url' => "http://www.ireland.com/" ) );
function setScore( $result )
{
foreach( $result as &$element )
{
$element['score'] = 0;
}
return $result;
}
$array = setScore( $array );
print_r( $array );
You could also do:
function setScore( &$result )
{...}
and then just:
setScore( $array );