php數組,修改,遍曆,函數等_PHP教程

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php數組的形式:①,數值數組形如:array(v1,v2,v3,v4,.....)array(值1,值2,值3, ……)②,關聯陣列形如:array(k1=>v1,k2=>v2,k3=>v3,.......)array(鍵1=>值1,鍵2=>值2,鍵3=>值3,……)③,多維資料$arr_arr = array(array(4567,77.7,99,100),"aa","bb",cc); 資料的顯示:print_r()var_dump()(包含了類型,長度等資訊)$arr = array(1,2,3,4,5);print_r($arr);echo "
";var_dump($arr);結果是:Array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5)array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(5)}數組的遍曆foreach():$arr = array(1,2,3,4,5); foreach($arr as $k => $v){echo "key => value is ".$k."=>".$v."
";}多維陣列的輸出:$arr_arr = array(array(4567,77.7,99,100),"aa","bb",cc);echo "var_dump 多維陣列
";var_dump($arr_arr);echo "print_r() 多維陣列
";print_r($arr_arr);顯示:var_dump 多維陣列array(4) { [0]=> array(4) { [0]=> int(4567) [1]=> float(77.7) [2]=> int(99) [3]=> int(100) } [1]=> string(2) "aa" [2]=> string(2) "bb" [3]=> string(2) "cc"}print_r() 多維陣列Array( [0] => Array ( [0] => 4567 [1] => 77.7 [2] => 99 [3] => 100 ) [1] => aa [2] => bb [3] => cc)數組函數:刪除函數:unset($arr['k']);值排序:sort(),rsort()(倒序)鍵排序:ksort(),krsort()求和:array_sum($array)個數:count()<---->sizeof()尋找:in_array(value,$array) array_search(value,$array)哎先看看W3Cschool上的,貼個目錄,學習計劃搞起來,熟悉一下吧:一,php基礎篇PHP 基礎PHP 教程PHP 簡介PHP 安裝PHP 文法PHP 變數PHP 字串PHP 運算子PHP If...ElsePHP SwitchPHP 數組PHP 迴圈PHP 函數PHP 表單PHP $_GETPHP $_POST二,php進階PHP 進階PHP 日期PHP IncludePHP 檔案PHP 檔案上傳PHP CookiesPHP SessionsPHP E-mailPHP 安全 E-mailPHP ErrorPHP ExceptionPHP Filter三,php資料庫PHP 資料庫MySQL 簡介MySQL ConnectMySQL CreateMySQL InsertMySQL SelecthMySQL WhereMySQL Order ByMySQL UpdateMySQL DeletePHP ODBC四,php與xmlPHP XMLXML Expat ParserXML DOMXML SimpleXML 五,php與ajaxPHP 和 AJAXAJAX 簡介XMLHttpRequestAJAX SuggestAJAX XMLAJAX DatabaseAJAX responseXMLAJAX Live SearchAJAX RSS ReaderAJAX Poll

http://www.bkjia.com/PHPjc/477763.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/477763.htmlTechArticlephp數組的形式: ①,數值數組 形如:array(v1,v2,v3,v4,.....) array(值1,值2,值3, ) ②,關聯陣列 形如:array(k1=v1,k2=v2,k3=v3,.......) array(鍵1=值...

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