用php做一個查詢語句的方法:1、建立一個php範例檔案;2、使用mysqli_connect連接資料庫;3、透過「$q = "SELECT * FROM user WHERE gender = '".$gender ."'";$result = mysqli_query($db,$q);」語句實作查詢即可。
本教學操作環境:Windows7系統、PHP8.1版、Dell G3電腦。
怎麼用php做一個查詢語句?
php使用select語句查詢資料資訊
<html> <head> <title>Finding User</title> </head> <body> <h2>Finding users from mysql database.</h2> <form action="selectformhandler.php" method="post"> Select gender: <select name="gender"> <option value="male">man</option> <option value="female">woman</option> </select><br /> <input name="submit" type="submit" value="Find"/> </form> </body> </html>
<html> <head> <title>User found</title> </head> <body> <h2>User found from mysql database.</h2> <?php $gender = $_POST['gender']; if(!$gender){ echo "Error: There is no data passed."; exit; } if(!get_magic_quotes_gpc()){ $gender = addslashes($gender); } @ $db = mysqli_connect('localhost','root','12345678'); mysqli_select_db($db,'testphp'); if(mysqli_connect_errno()){ echo "Error: Could not connect to mysql database."; exit; } $q = "SELECT * FROM user WHERE gender = '".$gender."'"; $result = mysqli_query($db,$q); $rownum = mysqli_num_rows($result); for($i=0; $i<$rownum; $i++){ $row = mysqli_fetch_assoc($result); echo "Id:".$row['id']."<br />"; echo "Name:".$row['name']."<br />"; echo "Age:".$row['age']."<br />"; echo "Gender:".$row['gender']."<br />"; echo "Info:".$row['info']."<br />"; } mysqli_free_result($result); mysqli_close($db); ?> </body> </html>
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