php從數組中隨機選擇若干不重復元素

php從數組中隨機選擇若干唯一元素

<?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;
}

$phrases = array('Hello Sailor','Acid Test','Bear Garden','Botch A Job','Dark Horse',
    'In The Red','Man Up','Pan Out','Quid Pro Quo','Rub It In','Turncoat',
    'Yes Man','All Wet','Bag Lady','Bean Feast','Big Wig', 'Big Wig','Bear Garden'
    ,'All Wet','Quid Pro Quo','Rub It In');
print_r(unique_array($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</pre>