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PHP#9MySQL#5 - locSP( b1.php, b2.php, b3.php) - Lọc sản phẩm

//connect.php <?php //Kết nối đến server DB: $link=@mysqli_connect("localhost","root","") or die("Không thể kết nối đến Server!"); //Chọn database cần thao tác: mysqli_select_db($link,"webtintuc") or die("Không tồn tại DB này!"); mysqli_query($link,"set names 'utf8'"); ?> //b1 <!doctype html> <html> <head> <meta charset="utf-8"> <title>Untitled Document</title> </head> <body> <form id="form1" name="form1" method="get"> <p> <label for="chungloai">Chủng loai sp:</label> <select name="chungloai" id="chungloai"> <?php include("connect.php"); $sl="select * from webtm_chungloaisp"; $kq=mysqli_query($link,$sl); while($d=mysqli_fetch_array($kq)){ ?> <option value="<?php echo $d['idCL'];?...