Does anyone know how I can create an Array?
$string = '3-1-0-1.11,3-1-1-1.12,3-1-2-1.13,3-1-3-1.14,3-2-0-1.02,3-2-1-1.03,3-2-2-1.04,3-2-3-1.05,3-2-4-1.06,3-3-0-3.23,3-3-1-3.24,3-3-2-3.25,3-3-3-3.26';
$array = explode(',', $string);
$last_entry = null;
foreach ($array as $current_entry) {
$first_char = $current_entry[2]; // first Sign
if ($first_char != $last_entry) {
echo '<h2>'. $first_char . '</h2><br>';
}
echo $current_entry[4] . '<br>';
$last_entry = $first_char;
}
I need an Array like this:
Array
(
[1] => Array
(
[0] => 0
[1] => 1
[2] => 2
)
[2] => Array
(
[0] => 0
[1] => 1
[2] => 2
[3] => 3
[4] => 4
[5] => 5
)
[3] => Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
)
)
The first number 3 and other numbers 3 after comma are not important.
Important numbers are second and third numbers in values of $array.
I need categories. Example: if the first (second) number is 1 create Category 1 and subcategory 1 where first (second) number actual is 1.
To create an an array, you need to declare it using array() feature. Below I have created a blank array.
$array = array();
An array with values looks like this
$array = array("string", "string2", "string3");
To add values in an array, you use the array_push method.
array_push($array, "string4");
On multidimensional arrays, declare the array then add the inner array, below is objct oriented
$array = array("string"=>array("innerstring", "innerstring2"), "string2" => array("innerstring3", "innerstring4"), "string3" => array("innerstring5", "innerstring6"));
and procedural
$array=array(array("string", "innerstring", "innerstring2",), array("string2", "innerstring3", "innerstring4"), array("string3", "innerstring5", "innerstring6"));
Try next script:
$string = '3-1-0-1.11,3-1-1-1.12,3-1-2-1.13,3-1-3-1.14,3-2-0-1.02,3-2-1-1.03,3-2-2-1.04,3-2-3-1.05,3-2-4-1.06,3-3-0-3.23,3-3-1-3.24,3-3-2-3.25,3-3-3-3.26';
foreach(explode(',', $string) as $tpl) {
$tpl = explode('-', $tpl);
$tpl[3] = explode('.', $tpl[3]);
$result[$tpl[1]][$tpl[2]][$tpl[3][0]] = !empty($tpl[3][1]) ? $tpl[3][1] : null;
}
var_dump($result);
Related
I am trying to split array data into multiple arrays based on change in data value at known position (column).
$input = array(
array(1,2,3),
array(4,5,3),
array(7,8,4),
array(9,10,4),
array(11,12,4)
);
Here column 3 changes values from 3 to 4
and expected result is to have 2 arrays
$out1 = array(array(1,2,3),array(4,5,3));
$out2 = array(array(7,8,4), array(9,10,4), array(11,12,4));
since number of rows are variable, cannot use array_chunk
since column 3 values are variable, cannot use array_filter
number of output arrays are also variable.
trying splice but failing...
You can use array_reduce to make new array, where index will be equal to last numbers in items
$new = array_reduce($input, function($c, $x) { $c[$x[2]][] = $x; return $c; }, [] );
$out1 = $new[3];
$out2 = $new[4];
demo
But if array is not sorted and you want to split at points of changing that number, the code can be
$i = -1;
$last = null;
$new = [];
foreach($input as $x) {
if ($x[2] != $last) {
$i++;
$last = $x[2];
}
$new[$i][] = $x;
}
demo
You can use split index with index of array,
$out1 = $out2 = [];
$splitIndex = 2;
foreach($input as $k => $v){
if($k < $splitIndex){
$out1[] = $v;
}else{
$out2[] = $v;
}
}
print_r($out1);
print_r($out2);
Working demo
Output:-
Array
(
[0] => Array
(
[0] => 1
[1] => 2
[2] => 3
)
[1] => Array
(
[0] => 4
[1] => 5
[2] => 3
)
)
Array
(
[0] => Array
(
[0] => 7
[1] => 8
[2] => 4
)
[1] => Array
(
[0] => 9
[1] => 10
[2] => 4
)
[2] => Array
(
[0] => 11
[1] => 12
[2] => 4
)
)
i have one array and elements like:-
enter code here
$array = array('1', '2', '3', '4','5','6'); // n number of elements
echo "<pre>"; print_r($array); die;
when i print this array its give me this result
enter code here
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
)
i want output something like:-
enter code here
Array
(
[0] => Array
(
[0] => 1
[1] => 2
)
[1] => Array
(
[0] => 3
[1] => 4
)
[2] => Array
(
[0] => 5
[1] => 6
)
)
Can anyone help me how i can make two group of elements
Not:- array elements are dynamic it may be n number of elements
As you are requesting an example using foreach, you can use the modulus % mathematics operator to check every x.
$array = array( 1, 2, 3, 4, 5, 6 );
$tmp = array(); // temporarily hold values
$newarray = array(); // new array to hold final results
foreach ($array as $key=>$value) {
$tmp[] = $value; // add this value to temporary variable
if (($key + 1) % 2 == 0) {
$newarray[] = $tmp; // add temporary variable to new array
$tmp = array(); // reset temporary variable
}
}
// add remaining from odd number (if any)
if(count($tmp) > 0) {
$newarray[] = $tmp;
}
I have an array of filenames:
Array
(
[2] => 1_1_page2-img1.jpg
[3] => 1_2_page2-img1-big.jpg
[4] => 2_1_page2-img1.jpg
[5] => 2_2_page2-img1-big.jpg
[6] => 3_1_page2-img1.jpg
[7] => 4_1_page2-img1.jpg
[8] => 4_2_page2-img1.jpg
[9] => 5_2_page2-img1.jpg
)
I'm trying to rearrange them so they're grouped together by their first number. I'm guessing I could maybe separate them with a pipe so I could then distinguish them afterwards. Either that or a multidimensional array.
I know I can perform an explode("_",$filename); to get the first and second digits before the underscores.
The catch is even though the beginning numbers should always increment, there won't necessarily be 2 files per initial number.
So I'm either trying to make it into the following:
Array
(
[0] => 1_1_page2-img1.jpg|1_2_page2-img1-big.jpg
[1] => 2_1_page2-img1.jpg|2_2_page2-img1-big.jpg
[2] => 3_1_page2-img1.jpg|
[3] => 4_1_page2-img1.jpg|4_2_page2-img1.jpg
[4] => |5_2_page2-img1.jpg
)
Or something a bit tidier perhaps? I just can't work out the foreach to put them together.
Or is there an array related command that will put them together easier?
My preference would be to store them in subarrays, as this will be much easier to deal with in the long run; so this would be a possibility, given your array is in $arr:
$newarr = array ();
while (list($key, $val) = each($arr)) {
$subarray_index = substr($val, 0, strpos($val, "_"));
$newarr[$subarray_index][] = $val;
}
Is this what you mean?
$arr = Array(
2 => '1_1_page2-img1.jpg',
3 => '1_2_page2-img1-big.jpg',
4 => '2_1_page2-img1.jpg',
5 => '2_2_page2-img1-big.jpg',
6 => '3_1_page2-img1.jpg',
7 => '4_1_page2-img1.jpg',
8 => '4_2_page2-img1.jpg',
9 => '5_2_page2-img1.jpg'
);
function orderArray($pArr){
$first = '0';
$newArr = array();
foreach($pArr as $val){
if(strpos($val,$first) !== 0){
if(substr($val,2,1)==='1'){
$newArr[]=$val;
}else{
$newArr[]='|'.$val;
}
$first = substr($val,0,1);
}else{
$curIndex = count($newArr) - 1;
$newArr[$curIndex] = $newArr[$curIndex].'|'.$val;
}
return $newArr;
}
$result = orderArray($arr);
print "number of values: ".count($result)."<br>";
foreach($result as $value){
print $value."<br>";
}
Just worked it out now based on another post in stackoverflow:
foreach ($scanned_directory as $filename){
$ids = explode("_",$filename);
$groups[$ids[0]][] = $filename;
}
echo "<pre>";
ksort($groups);
print_r($groups);
echo "</pre>";
Displays:
Array
(
[1] => Array
(
[0] => 1_1_page2-img1.jpg
[1] => 1_2_page2-img1-big.jpg
)
[2] => Array
(
[0] => 2_1_page2-img1.jpg
[1] => 2_2_page2-img1-big.jpg
)
[3] => Array
(
[0] => 3_1_page2-img1.jpg
[1] => 3_2_page2-img1-big.jpg
)
[10] => Array
(
[0] => 10_1_page2-img1.jpg
)
[11] => Array
(
[0] => 11_2_page2-img1-big.jpg
)
)
There isn't a nice automated way of doing this, but you could use a simple loop:
$array = [];
foreach ($filename as $file) {
$fields = explode('_', $file);
$array[$fields[0]][$fields[1]] = $file;
}
An example is located here.
This question already has answers here:
Cartesian Product of N arrays
(10 answers)
Closed 8 years ago.
Let's assume I have an two arrays and I want to merge every value with the other value of the array.
Array 1
array (size=2)
0 => 1
1 => 2
Array 2
array (size=2)
0 => 3
1 => 4
Wanted result array / string:
array (size=4)
0 => '1,3'
1 => '1,4'
2 => '2,3'
3 => '2,4'
I can't get my head around it. Obviously I would need to merge every one array key/value with the other ones. Is there a more elegant way then doing this in a while/foreach loop?
You need a foreach loop inside a foreach loop. (Actualy, you will have to loop through both arrays to get a concatenated product of both arrays, you don't actually need two foreach loops). You could mix: whiles, foreach, for, or php filter/intersect array functions
Example
$array1 = array(1,2);
$array2 = array(3,4);
$result = array();
foreach ($array1 as $item1){
foreach($array2 as $item2){
$result[] = $item1.','.$item2;
}
}
https://eval.in/215001
your result array Length will be array1.Length * array2.Length
2d arrays
You could also put an array inside an array like this:
$array1 = array(1,2);
$array2 = array(3,4);
$result = array();
foreach ($array1 as $item1){
foreach($array2 as $item2){
$result[] = array($item1, $item2);
}
}
//$result[0][0] = 1 -- $result[0][1] = 3
//$result[1][0] = 1 -- $result[1][1] = 4
//$result[2][0] = 2 -- $result[2][1] = 3
//$result[3][0] = 2 -- $result[3][1] = 4
We call this a 2d (2 dimensional) array, because you could grapicly display this as a grid, like displayed here above. If you would put an Array, inside an Array inside an Array, you would call this a 3 dimensional array, etc.
print_r($result); in php:
Array
(
[0] => Array
(
[0] => 1
[1] => 3
)
[1] => Array
(
[0] => 1
[1] => 4
)
[2] => Array
(
[0] => 2
[1] => 3
)
[3] => Array
(
[0] => 2
[1] => 4
)
)
try
$a= array ('0' => 1,'1' => 2);
$b= array ('0' => 3,'1' => 4);
for($i=0; $i<count($a); $i++) {
for($j=0; $j<count($b); $j++) {
$newarr[]= $a[$i].','.$b[$j];
}
}
print_r($newarr);//Array ( [0] => 1,3 [1] => 1,4 [2] => 2,3 [3] => 2,4 )
$a=array('1','2');
$b=array('3','4');
$res=array();
for($i=0;$i<count($a);$i++)
{
foreach($b as $bb)
{
$res[]=strval($a[$i].','.$bb);
}
}
print_r($res);//output=Array ( [0] => 1,3 [1] => 1,4 [2] => 2,3 [3] => 2,4 )
I have an array data that look like this :
Array (
[0] => Array (
[0] => Name:
[1] => John W.
[2] => Registration ID:
[3] => 36
)
[1] => Array (
[0] =>Age:
[1] => 35
[2] => Height:
[3] => 5'11"
)
[3] => Array (
[0] => Sex:
[1] => M
[2] => Weight:
[3] => 200lbs
)
[4] => Array (
[0] => Address
)
[5] => Array (
[0] => 6824 crestwood dr delphi, IN 46923
))
And I want to convert it to associative array like this :
Array(
['Name']=> John W.
['Registration ID']=> 36
['Age']=> 35
['Height'] => 5'11''
['Sex']=>M
['Weight']=>200lbs
['Address']=>6824 crestwood dr delphi, IN 46923
)
I have no idea at all how to do this, since the supposed to be array column header were also in sequence, so it makes difficult to convert this array.
Any help I appreciate, thx.
Given your origin array is called $origin , you can do it like this:
$merged = array();
foreach($origin as $val) {
$merged = array_merge($merged, $val);
}
$tot = count($merged) - 1;
for ($i=0;$i<$tot;$i+=2) {
$result[$merged[$i]] = $merged[$i+1];
}
var_dump($result); // To test the resulting array
Firstly, I use array_merge() to flatten the $origin array to only one dimension/depth, so we later iterate it (stepping each 2 items per iteration) and assigning each pair of items ($i and $i+1) to the resulting array.
Looks like, for the first 3 children, you can just assign the even value to the previous element as key. Then, assign the fourth one as key for fifth element.
$result = array();
foreach ($array as $key => $value)
{
if ($key < 4) {
$elements = array_values($value);
$result[$elements[0]] = $elements[1];
$result[$elements[2]] = $elements[3];
}
if ($key == 4)
$fifthkey = $value;
if ($key == 5)
$result[$fifthkey] = $value;
}
Also, note that you have to escape your height string quotes.