PHP學習之數組篇

<?php    #數組的定義方式1    $area = array("beijing","changsha","wuhan");    $areaCode = array("010"=>"beijing","0731"=>"changsha","020"=>"wuhan");        #數組的定義方式2    $student[] = "zhangsan";    $student[] = "lisi";    $student[] = "wangwu";        $stuInfo[] = array("a001"=>"zhangsan");    $stuInfo[] = array("a002"=>"wangwu");        #is_array()    echo 'is_array()檢測:'.(is_array($area) == 1 ? "true" : "false");        #foreach array    foreach($areaCode as $k => $v){        printf("<br/>%s => %s",$k,$v);    }        #用於定義值填充數組    $count = range(0, 100);    var_dump($count);        $t = range("a", "z");    print_r($t);        $x = range(0, 100,2); #0-100的偶數    print_r($x);        echo "<hr/>";        #添加和刪除數組元素    /*     * 1.array_unshift() 在數組頭部添加元素     * 2.array_push() 在數組尾部添加元素     * 3.array_shift() 在數組頭部刪除元素     * 4.array_pop() 在數組尾部刪除元素     * */        array_unshift($area, "shenzhen");    print_r($area);    echo "<hr/>";        array_shift($area);    print_r($area);    echo "<hr/>";        array_push($area, "dongguan");    print_r($area);    echo "<hr/>";        array_pop($area);    print_r($area);    echo "<hr/>";        #定位元組元素    /*     * 1.in_array()     * 2.array_key_exists()     * 3.array_search()     * */    echo (in_array("beijing",$area) == 1 ? "true" : "false");    echo "<hr/>";        echo array_key_exists("007", $areaCode) == 1 ? "true" : "false";    echo "<hr/>";        $s = array_search("changsha", $areaCode);    if($s){        echo $s.":".$areaCode[$s];    }        #擷取數組的Key和Value集合    $ks = array_keys($areaCode);    echo "<hr/>";    print_r($ks);        $vs = array_values($areaCode);    echo "<hr/>";    print_r($vs);        #遍曆數組    while($key = key($area)){        printf("<br/>key:%s",$key);        next($area);    }        #向函數傳遞數組值    $cc = array(1,2,3,4,5,6,7);    echo "<hr/>";    function Add(&$num)    {        $num += 10;    }        array_walk($cc, "Add");    print_r($cc);        #計算數組大小    echo "<hr/>";    echo count($area);        #數組排序    $r = array_reverse($area);    echo "<hr/>";    print_r($r);        sort($r);    echo "<hr/>";    print_r($r);        #數組的合并與串連    #$d = array_merge($a,$b);    #array_combine($keys, $values)?>