我們學習了解了這么多關于PHP的知識，不知道你們對PHP高級檢索功能的實現以及動態(tài)拼接sql是否已經完全掌握了呢，如果沒有，那就跟隨本篇文章一起繼續(xù)學習吧!

PHP高級檢索功能的實現以及動態(tài)拼接sql。完成的功能有：可以單獨根據一個條件查詢，也可以通過多個條件綜合查詢，難點在于動態(tài)拼接sql。

完成的效果

總畫面

單獨根據姓名模糊查詢

單獨根據性別查詢

根據多個條件綜合查詢

前臺頁面代碼

<form action="" method="post"> <labal>姓名:</labal> <input style="width:105px" type="text" name="search_name" id="search_name" placeholder="姓名"> &nbsp <labal>性別:</labal> <input type="radio" name="search_sex" id="man" value="0">男 <input type="radio" name="search_sex" id="women" value="1">女 &nbsp <labal>年齡:</labal><input style="width:105px" type="text" name="search_age" id="add_age"placeholder="年齡"> &nbsp <labal>郵箱:</labal><input style="width:150px" type="text" name="search_email" id="search_email" placeholder="郵箱"> <input id="b" name="submit" style="width:60px" type="submit" value="檢索"> </form>

后臺處理代碼

//接收用戶輸入的數據$name = $sex = $age = $email = "";if (isset($_POST['submit'])) {     if (isset($_POST['search_name'])) {     	$name = $_POST['search_name'];     }     if (isset($_POST['search_sex'])) {     	$sex = $_POST['search_sex'];     }     if (isset($_POST['search_age'])) {     	$age = $_POST['search_age'];     }     if (isset($_POST['search_email'])) {     	$email = $_POST['search_email'];     }//執(zhí)行檢索sql$search_sql = $myTest->searchData($name,$sex,$age,$email);$result = $myTest->sqlRun($search_sql);

動態(tài)拼接sql

public function searchData($name,$sex,$age,$email){  		switch ($name) { 			//未輸入姓名 			case null: 				$name_info=''; 				break; 			     //根據姓名模糊查詢 			    default: 				$name_info=" and name LIKE '%".$name."%'"; 				break; 		} 		switch ($sex) { 			//未輸入性別 			case null: 				$sex_info=''; 				break; 			//根據性別準確查詢 			default: 				$sex_info=' and sex='.$sex; 				break; 		} 		switch ($age) { 			//未輸入年齡 			case null: 				$age_info=''; 				break; 			//根據年齡準確查詢 			default: 				$age_info=' and age='.$age; 				break; 		} 		switch ($email) { 			//未輸入郵箱 			case null: 				$email_info=''; 				break; 			//根據郵箱模糊查詢 			default: 				$email_info=" and email LIKE '%".$email."%'"; 				break; 		}$search_sql='SELECT * FROM users WHERE 1=1'.$name_info.$sex_info.$age_info.$email_info;'';return $search_sql; 	}

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