本文實(shí)例講述了php從數(shù)組中隨機(jī)選擇若干不重復(fù)元素的方法。分享給大家供大家參考。具體實(shí)現(xiàn)方法如下：
    代碼如下:
    <?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;
    }
    $phrases = array('Hello Sailor','Acid Test','Bear Garden','Botch A Job','Dark Horse',
    'In The Red','Man Up','Pan Out','Quid Pro Quo','Rub It In','Turncoat',
    'Yes Man','All Wet','Bag Lady','Bean Feast','Big Wig', 'Big Wig','Bear Garden'
    ,'All Wet','Quid Pro Quo','Rub It In');
    print_r(unique_array($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
    希望本文所述對(duì)大家的php程序設(shè)計(jì)有所幫助。