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php从数组随机选择若干不重复元素的简单示例,
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PHP从数组中
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/**
* PHP从数组中随机选择若干不重复元素
*
* @param
* @arrange 512-笔记网: jb51.cc
* $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;
}
$phrases = array('Hello Sailor','Acid Test','Bear Garden','Botch A Job','Dark Horse','In The Red','Man Up','Pan Out','Quid Pro Quo','Rub It In','Turncoat','Yes Man','All Wet','Bag Lady','Bean Feast','Big Wig','Rub It In');
print_r(unique_array($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
/*** 来自编程之家 jb51.cc(jb51.cc) ***/