PHP randomly selects several non-repeating elements from the array, PHP array repeating elements _php tutorial

PHP randomly selects several non-repeating elements from the array, and the PHP array repeats the elements

This example describes how PHP randomly selects several distinct elements from an array. Share to everyone for your reference. The implementation method is as follows:

Copy CodeThe code is as follows: <?php
/*
* $array = the array to be filtered
* $total = The maximum number of items to return
* $unique = Whether or not to remove duplicates before getting a random list
*/
function Unique_array ($array, $total, $unique = True) {
$newArray = Array ();
if ((bool) $unique) {
$array = Array_unique ($array);
}
Shuffle ($array);
$length = count ($array);
for ($i = 0; $i < $total; $i + +) {
if ($i < $length) {
$newArray [] = $array [$i];
}
}
return $newArray;
}
$phrases = Array (' Hello Sailor ', ' Acid Test ', ' Bear garden ', ' botch A Job ', ' Dark Horse ',
' In the Red ', ' Mans up ', ' Pan out ', ' quid Pro Quo ', ' Rub It in ', ' turncoat ',
' Yes man ', ' All Wet ', ' Bag Lady ', ' Beans Feast ', ' Big Wig ', ' Big Wig ', ' Bear garden '
, ' All Wet ', ' Quid Pro Quo ', ' Rub It in ');
Print_r (Unique_array ($phrases, 1));
Returns 1 Result
Print_r (Unique_array ($phrases, 5));
Returns 5 Unique Results
Print_r (Unique_array ($phrases, 5, false));
Returns 5 results, but could have duplicates if
There is duplicates in original array
Print_r (Unique_array ($phrases, 100));
Returns Unique Results
Print_r (Unique_array ($phrases, +, false));
Returns results, but could have duplicates if
There is duplicates in original array

I hope this article is helpful to everyone's PHP programming.

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