PHP Exercises: Get an array with n elements removed from the beginning of a given array
PHP: Exercise-91 with Solution
Write a PHP program to get an array with n elements removed from the beginning of a given array.
Sample Solution: -
PHP Code:
<?php
//Licence: https://bit.ly/2CFA5XY
function take($items, $n = 1)
{
return array_slice($items, 0, $n);
}
print_r(take([1, 2, 3], 1));
echo "\n";
print_r(take([1, 2, 3, 4, 5], 2));
?>
Sample Output:
Array ( [0] => 1 ) Array ( [0] => 1 [1] => 2 )
Flowchart:
PHP Code Editor:
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Previous: Write a PHP program to return all elements in an given array except for the first one.
Next: Write a PHP program to filter out the elements of an given array,that have one of the specified values.
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($a, $b) { return $a['order'] - $b['order']; } usort($myArray, 'sortByOrder');
Starting in PHP 5.3, you can use an anonymous function:
usort($myArray, function($a, $b) { return $a['order'] - $b['order']; });
And finally with PHP 7 you can use the spaceship operator:
usort($myArray, function($a, $b) { return $a['order'] <=> $b['order']; });
To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.
usort($myArray, function($a, $b) { $retval = $a['order'] <=> $b['order']; if ($retval == 0) { $retval = $a['suborder'] <=> $b['suborder']; if ($retval == 0) { $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder']; } } return $retval; });
If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual
Ref : https://bit.ly/3i77vCC
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