PHP method to randomly select a number of non-repeating elements from an array, PHP array repeating elements_PHP tutorial

How PHP randomly selects several non-repeating elements from an array, PHP array repeats elements

The example in this article describes how PHP randomly selects several non-repeating elements from an array. Share it with everyone for your reference. The specific implementation method is as follows:

Copy code The code is as follows: /*
* $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;
}
$phrases = array('Hello Sailor','Acid Test','Bear Garden','Botch A Job','Dark Horse',
'In The Red','Man Up','Pan Out','Quid Pro Quo','Rub It In','Turncoat',
'Yes Man','All Wet','Bag Lady','Bean Feast','Big Wig', 'Big Wig','Bear Garden'
,'All Wet','Quid Pro Quo','Rub It In');
print_r(unique_array($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 may have duplicates if
// there are duplicates in original array
print_r(unique_array($phrases, 100));
// Returns 100 unique results 
print_r(unique_array($phrases, 100, false));
// Returns 100 results, but may have duplicates if
// there are duplicates in original array

I hope this article will be helpful to everyone’s PHP programming design.