Php數組2

數組的定位：

1.搜索；in_array();返回布爾型；

<?

    $ary_t = array(
                "name" , "killy",
                "age"  , "18",
                "love" ,"sleep",

     );
    if(in_array("name",$ary_t)){
        echo 'name is in the array of \$ary_t';
    }else{
        echo 'name is not in the array of \$ary_t ';
    }
    //結果
    //name is in the array of \$ary_t
?>

2.搜索關聯數組鍵

arrary_key_exists(查找值，數組);返回布爾值；

arrary_search (查找值,數組)

 

<?

    $ary_t = array(
                "name" => "killy",
                "age"  => "18",
                "love" => "sleep",

     );
     //判斷是否有健值"age";
    if(array_key_exists("age",$ary_t)){
        echo "name is {$ary_t['age']}"."<br />";
    }else{
        echo "the array has not the key of 'age'";
    }
    //判斷時否有數組值"sleep";
    if(array_search("sleep",$ary_t)){
        echo "the love is sleep;";
    }else{
        echo "thc array has not the content of 'sleep'";
    }
//  結果:
//  name is 18
//  the love is sleep;

?>

3.獲取數組鍵與值；

array_keys(數組)；返回一組數組；

array_values();   返回一組數組；

 

<?

    $ary_t = array(
                "name" => "killy",
                "age"  => "18",
                "love" => "sleep",

     );
    //獲取數組鍵 ；
    $key = array_keys($ary_t);
    print_r($key);
    echo "<br />";
    //獲取數組值 ；
    $content = array_values($ary_t);
//    print_r($content);
//    結果
//    Array ( [0] => name [1] => age [2] => love )
//    Array ( [0] => killy [1] => 18 [2] => sleep )
//
?>

指針來控制數組；

key(); 獲取當前數組鍵 ；

current();獲取當前數組值；

each(); 獲取當前數組鍵和值；

next();移到下一個元素位置；

prev()；移動上一個元素位置；

reset(); 將指針移動第一個元素位置；

end(); 將指針移動到最後一個元素的位置；

 

<?

    $ary_t = array(
                "name" => "killy",
                "age"  => "18",
                "love" => "sleep",

     );
    //遍歷鍵值；
    while($key = key($ary_t)){
        echo $key."\t";
        next($ary_t);
    }
    echo "<br />";
    //上面編加之後。數據的指針已經到最後一個元素，要重置到首位；
    reset($ary_t);
    //偏歷數值；
    while ($content = current($ary_t)) {
        echo $content."\t";
        next($ary_t);
    }
?>

向函數傳遞數組值；

array_walk();

參考下：http://www.w3school.com.cn/php/func_array_walk.asp