I have some arrays extracted from a XML-file. These are in
$array0 = (.......)
$array1 = (.......)
...
$arrayN = (.......)
Now I need a single array with all arrays in it separated by "," as
$masterArray = array($array0,
$array1,
...
$arrayN)
I tried
for ( $i = 0; $i < N; $i++) {
$masterArray = $masterArray + $array[$i];
}
with no result. I tried array_merge but this will give one
$masterArray(......................all items of all $arrays.....)
How can I do it right?
for ( $i = 0; $i < N; $i++) {
$temp = "array".$i;
$masterArray[$i] = ${$temp};
}
Given your exact definition of what you got and what you want the routine should be:
for ( $i = 0; $i < N; $i++) $masterArray[] = ${'array'.$i};
Not much to explain here. You make a new entry in an array with $variable[] = <entry>; and you access your numbered array with a variable variable, see:
http://php.net/manual/en/language.variables.variable.php
I guess you wont to create a multi dimension array:
$masterArray = array();
$masterArray[] = $array0;
$masterArray[] = $array1;
...
$masterArray[] = $arrayN;
this will in all arrays as element of the MasterArray:
$masterArray[0=>(....),1=>(....), ...];
Then access it like this:
$arr1_key1 = $masterArray[1]['key1'] ; //$array1['key1'];
You can add specific keys if you wont:
$masterArray['arr1'] = $array1;
$arr1_key1 = $masterArray['arr1']['key1'] ; //$array1['key1']
In general read some more to get better understanding on how to work with arrays ;)
Related
I want to sum each row of a multidimensional array :
$number = array
(
array(0.3,0.67, 0.3),
array(0.3,0.5,1),
array(0.67,0.67,0.3),
array(1,0.3,0.5)
);
The result what i want is like this :
row1 = 1.27
row2 = 1.8
row3 = 1.64
row4 = 1.8
I already tried this code :
for($i = 0; $i < 4; $i++) {
for($j = 0; $j < 5; $j++) {
$sumresult[] = array_sum($number[$i][$j]);
}
}
But it appear an error like this :
Warning: array_sum() expects parameter 1 to be array, double given in xxxx
array_sum needs array not values. Do like this:
for($i = 0; $i < 4; $i++) {
$sumresult[] = array_sum($number[$i]);
}
its because you are passing an value instead of the array containing it.
One correct solution would be:
$sumResult = array();
foreach($number as $values){
$sumResult []= array_sum($values);
}
print_r($sumResult);
Should do the trick ;)
It's easier to just map the array_sum() function to the array to sum the inner arrays:
$sumresult = array_map('array_sum', $number);
I have two strings, one containing names separated by commas and the other containing email addresses separated by commas.
I now want my end result to replicate the behaviour as if I had gotten those values from the database with a:
while ($row = $query->fetch(PDO::FETCH_ASSOC)) {
echo $row['name'].'<br />'.$row['email'];
}
So I have for example these strings:
email1#domain.com,email2#domain.com,email3#domain.com
and
name1,name2,name3
And can then explode these into value arrays. Now, after exploding them,
I want to be able to make a loop where in each loop I can get $name[0] and $email[0] together, and $name[1] and $email[1] together, etc.
How can I merge the two arrays (after exploding them) and get the data for each datapair (name and email) in a loop?
So if I understood you right, you are converting your strings (lets call them email, and name) too two arrays (lets call them arrEmail, and arrName) and now you want to get a array with the merged datasets.(creating the arrays should be easy if not check this out: manual for php explode function)
If so I would create a for loop based on the length of your two arrays. In the loop I would extract value i of arrEmail and arrName, and put the information into an two-dimensional array. Maybe something like this:
It should work but I didn't test it for ages so if not leave me a comment.
<?php
$arrEmail = array();
$arrName = array();
$arrGoal;
$arrLength = count($arrName);
//creating two-dimensional Array
for($i = 0; $i < $arrLength; $i++){
$arrGoal[$i] = array($arrName[$i], $arrEmail[$i]);
//should look something like this ((name, email),(name, email)…)
}
$arrGoalLength = count($arrGoal);
//accessing Array
//1. dimension
for($i = 0; $i < $arrGoalLength; $i++){
//2. dimension
//Variables should be global (but aren't)
$newName = $arrGoal[$i][0];
$newEmail = $arrGoal[$i][1];
}
?>
I think you want something like this:
$output = array();
for ($i = 0; $i < count($names); $i++) {
$output[] = $names[$i] . ' ' . $emails[$i];
}
print_R($output);
$emails = 'email1#domain.com,email2#domain.com,email3#domain.com';
$emails = explode(',', $emails);
$names = 'name1,name2,name3';
$names = explode(',', $names);
and you can use array_combine() as follow :
$combined = array_combine($names, $emails);
foreach($combined as $name => $email){
echo $name, ' : ', $email, '<br/>';
}
I think you should use the built in explode function wich will allow you to turn a string to an array by spliting it using a delimiter (comma) :
$names = explode(",",$row['name']);
$email = explode(",",$row['email']);
for merging them you should use something like this
$Array = array();
for ($j = 0; $j < count($names); $j++) {
$Array[] = [$names[$j],$email[$j]];
}
This is kind a related with your question, but only if you like to access the value by a key(e.g. access the name by email provided):
<?php
$emails = 'email1#gmail.com,email2#gmail.com,email3#gmail.com';
$names = 'name1,name2,name3';
$arrayEmails = explode(',',$emails);
$arrayNames = explode(',',$names);
$result = array_combine( $arrayEmails, $arrayNames);
print_r($result);
?>
I load a xml-file which contains several arrays.
$array0 = (.......)
$array1 = (.......)
...
$arrayN = (.......)
In my HTML-part I have a DIV to display each array. To do it write all arrays in one masterarray:
for ( $i = 0; $i < 1; $i++) $masterArray[] = ${'array'.$i};
and can access each array
$Titel = $masterArray[0] [$i] [$kat] [0] ["TitelD"];
This works if I have more than one array in my xml-File. If I have only one the masterarray rests empty. Why that? If I copy a second in the xml-File it works... (with displaying the second!)
What can I do to get only one array in the masterarray?
This XML works:
and when changing the url to this xml-file (in the same html/php-file) the DIV is empty:
change this
for ( $i = 0; $i < 1; $i++)
to
for ( $i = 0; $i <= 1; $i++)
I have a set of numbers S = [1,2,3,4,5,6]; And I want to make all possible pairs among them but one thing to know the pair could not be repeat.
i have used this :-
$pairs = array('1','2','3','4','5','6');
$count = count($pairs);
$array = array();
for($i = 0;$i <= $count; $i++){
for($j = 1; $j < $count; $j++){
if($i < $j){
$array[$i][] = $pairs[$i].','.$pairs[$j];
}
}
}
I want some thing like this :-
S = [1,2,3,4,5,6];
[1,2],[1,3],[1,4],[1,5],[1,6]
[2,3],[2,4],[2,5],[2,6]
[3,4],[3,5],[3,6]
[4,5],[4,6]
[5,6]
If anyone have any better suggestion please do reply as soon as possible.
Build a double nested foreach loop over your array, build your pairs and check if you already got them.
Pseudocode:
pairs = []
foreach(entry in array) {
foreach(entry2 in array) {
pair = [entry, entry2]
if(!alreadyexists(pair in pairs) {
add(pair to pairs)
}
}
}
havefun()
Btw: You won't get hurt if you try something yourself, this problem is rather trivial.
I want to know if it is possible to take an array and insert the array's values into a bigger array, multiple times, so that the values of the smaller array fill up the bigger array.
Say array1 has values ([0 => 'a'],[1 => 'b'],[2 => 'c']), and array2 can hold 8 values. So, how would I take the values of array1 and insert them into array2 continuously until array2 runs out of space, so that array2 would have the values 'a','b','c','a','b','c','a','b'?
Thanks in advance,
~Hussain~
Essentially, you want to loop over and over the small array, adding each element to the new array until it has reached the desired size.
Consider this:
$max = 8;
$Orig_Array = array('a', 'b', 'c');
$Next_Array = array();
while True
{
foreach($Orig_Array as $v)
{
$Next_Array[] = $v;
if(count($Next_Array) >= $max)
break 2;
}
}
Assuming that your input array is indexed sequentially:
$len = count($input);
$output = array();
for ($i = 0; $i < MAX_SIZE; ++$i)
$output[] = $input[$i % $len];
$a = array('a','b','c');
$desired = 8;
$b = array();
for($i=0;$i<($desired/count($a))+1;++$i) $b = array_merge($b,$a);
array_splice($b,$desired);
Or
$a = array('a','b','c');
$desired = 8;
$b = array();
for($i=0;$i<$desired/count($a);++$i) $b = array_merge($b,$a);
for($i=0;$i<($desired-count($b)-1);++$i) $b[] = $a[$i];
The first one fills up an array so that it has at least desired number of elements and cuts off the rest. The second one fills up an array up the desired number of elements modulo original array size and adds up the rest.
Here's one using the input array's internal pointer, to keep things conceptually simple:
$input = array(1, 2, 3);
$size = 32;
$output = array();
for ( $i = 0; $i < $size; $i++ ) {
$curr = current($input);
if ( $curr === false ) {
reset($input);
$curr = current($input);
}
$output[] = $curr;
next($input);
}
print_r($output);die;