很多時候，我們需要使用者輸入一些資料，並將這些資料進行顯示，我們可以用PHP的表單來實現。
<html><head><meta charset="utf-8"><title>form</title></head><body> <form action="welcome.php" method="post"> //action說明將資料傳入該檔案，若action為空白，則提交到當前指令碼姓名: <input type="text" name="name">學號: <input type="text" name="num">班級：<input tyoe="text" name="class"><input type="submit" value="提交"></form> </body></html>PHP將從表單中獲得的資訊存到welcome.php這一個檔案中。
<!DOCTYPE html><html><head><meta charset="utf-8"> //對於中文亂碼問題的解決，聲明utf-8<title></title></head><body><?php echo $_POST["num"]; ?><br> //以POST的方法從表單中讀取資料歡迎<?php echo $_POST["class"]; ?> <?php echo $_POST["name"]; ?>。</body></html>
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