How to filter array php [closed] - php

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I'm trying to get the bottom values of an array with a single condition as below :
Get all numeric values until the next value is a string then stop the instruction, and leave all other values even if they are numeric
<? php $data= [1,2,3,'web',4,5,6,'web',7,8,9]; ?>
The output will be : 7,8,9

Answer 1

We can try first filtering to find the first non numeric entry. Then, subset the array starting with this index. Finally, filter the subset again to remove all non numeric elements.
$data= [1,2,3,'web',4,5,6,'web',7,8,9];
$sub_data = array_filter($data, function($item) { return !is_numeric($item); });
$index = array_search(current($sub_data), $data);
$sub_data = array_slice($data, $index);
$sub_data = array_filter($sub_data, function($item) { return is_numeric($item); });
print_r($sub_data);
This prints:
Array
(
[1] => 4
[2] => 5
[3] => 6
[5] => 7
[6] => 8
[7] => 9
)

Answer 2

i don't know if there a specific function for it but i got the same result with this
$data= [1,2,3,'web',4,5,6,'web',7,8,9];
foreach ($data as $key => $value) {
if($value=="web"){
$x =$key;
}
}
$data = array_slice($data,$x);
print_r($data);
Output:
Array ( [0] => web [1] => 7 [2] => 8 [3] => 9 )

Answer 3

You can use array_reverse to get values from the array with elements in reverse order.
$reversed = array_reverse($data);
and then parse the array to stop where it gets a string
foreach($reversed as $value) {
if(is_string($value)) {
break;
}
$output[] = $value;
}
//print_r($output); // to print the output array. This will return the values like 9, 8, 7
// do a reverse again to get the values in the format you want.
$final= array_reverse($output);
print_r($final); // to print the final array. This will return the values like 7, 8, 9
Here is a DEMO

Answer 4

You can just pop values off the end until you get to something that isn't an int.
while (is_int($n = array_pop($data))) {
$result[] = $n;
}
This will modify the data array, so if you need to keep the original values, then do this with a copy.

Answer 5

The test you'll want depends on whether your example data is representative and all the numeric values you want in the array are of type int, or perhaps some might be numeric strings.
$data= [1,2,3,'web',4,5,6,'web',7,8,9];
$result = [];
for($i = count($data)-1; $i >= 0; $i++) {
// If some of the values you want might be numeric strings
// (e.g. "7") or decimals (e.g. 1.5), use this
if(!is_numeric($data[$i])) {
break;
}
// If your values will only be integer type, use this
if(!is_int($data[$i])) {
break;
}
array_unshift($result,$data[$i]);
}
// If you want the results in original order
print_r($result); // Output: [7,8,9]
// If you want the results inverted
$result = array_reverse($result);
print_r($result); // Output: [9,8,7]

Answer 6

Try this, here i am storing values in to an array $newArray if value is integer. if string found in value just reset the array $newArray
<?php
$data = [1,2,3,'web',4,5,6,'web',7,8,9];
$newArray = array(); // resultant array
foreach ($data as $key => $value) {
if(is_int($value)){
$newArray[] = $value;
}
else{
$newArray = array(); // reset if not integer
}
}
echo "<pre>";
print_r($newArray);
?>
DEMO
Result:
Array
(
[0] => 7
[1] => 8
[2] => 9
)
Now, you can use implode() for comma separated result, like:
echo implode(",",$newArray); // 7,8,9
Edit: (08-07-2019)
If Example:
$data = [1,2,3,'web',4,5,6,'web',7,8,9,'web'];
Code:
<?php
$data = [1,2,3,'web',4,5,6,'web',7,8,9,'web'];
$newArray = array(); // resultant array
end($data);
$keyLast = key($data); // fetches the key of the element pointed to by the internal pointer
foreach ($data as $key => $value) {
if(is_int($value) ){
$newArray[] = $value;
}
else{
if($keyLast === $key) { // if last key is string overwrite the previous array.
$newArray = $newArray;
}
else{
$newArray = array(); // reset if not integer
}
}
}
echo "<pre>";
print_r($newArray);
?>
Edit:
It's better to store all integer values into an array and then use array_slice() to get let three elements from new integer array like:
<?php
$data = [1,2,3,'web',4,5,6,'web',7,8,9,'web','web','web'];
$newArray = array(); // resultant array
foreach ($data as $key => $value) {
if(is_int($value) ){
$newArray[] = $value;
}
}
$lastThreeElement = array_values(array_slice($newArray, -3, 3, true));
echo "<pre>";
print_r($lastThreeElement);
?>