本文实例讲述了PHP从数组中随机选择若干不重复元素的方法。分享给大家供大家参考。具体实现方法如下：
代码如下:
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;
}
$phrases = array('Hello Sailor','Acid Test','Bear Garden','Botch A Job','Dark Horse',
'In The Red','Man Up','Pan Out','Quid Pro Quo','Rub It In','Turncoat',
'Yes Man','All Wet','Bag Lady','Bean Feast','Big Wig','Bear Garden','Rub It In');
print_r(unique_array($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
希望本文所述对大家的PHP程序设计有所帮助。
原文链接：https://www.f2er.com/php/22437.html