我正在创建一个供血者和接受者的网站。以捐赠者的形式输入他们的数据，并且该数据必须存储在数据库中以便以后访问。你能帮我写代码吗？
当用户单击提交时，必须将数据发送到我的数据库中
表单代码为
<form class="modal-content" action="insert.php">
<div class="container">
<h1>Sign Up</h1>
<p>Please fill in this form to create an account.</p>
<hr>
<label for="email"><b>Email</b></label>
<input type="text" placeholder="Enter Email" name="email" required>
<label for="phno"><b>Phone Number</b></label>
<input type="text" placeholder="Enter Phone Number" name="phno" required>
<label for="username"><b>Your Full Name</b></label>
<input type="text" placeholder="Enter Your Name" name="username" required>
<label for="bgroup">Blood Group</label>
<select id="bgroup" name="bgroup" required>
<option value=""></option>
<option value="a+">A +ve (A Positive)</option>
<option value="a-">A -ve (A Negative)</option>
<option value="b+">B +ve (B Positive)</option>
<option value="b-">B -ve (B Negative)</option>
<option value="o+">O +ve (O Positive)</option>
<option value="o-">O -ve (O Negative)</option>
<option value="ab+">AB +ve (AB Positive)</option>
<option value="ab-">AB -ve (AB Negative)</option>
</select>
<label for="groups"><b>State</b></label>
<select id="groups" name="groups" required>
<option value=""></option>
<option value='ap'>Andhra pradesh</option>
<option value='ar'>Auranchal pradesh</option>
<option value='as'>Assam</option>
<option value='br'>Bihar</option>
<option value='cg'>Chattisgarh</option>
<option value='go'>Goa</option>
<option value='gu'>Gujarth</option>
<option value='har'>Haryana</option>
<option value='hp'>Himachal Pradesh</option>
<option value='jk'>Jammu&Kashmir</option>
<option value='jr'>Jharkhand</option>
<option value='kar'>Karnataka</option>
<option value='ker'>Kerala</option>
<option value='mp'>Madhya Pradesh</option>
<option value='mh'>Maharashtra</option>
<option value='Man'>Manipur</option>
< option value='mg'>Meghalaya</option>
<option value='mz'>Mizoram</option>
<option value='na'>Nagaland</option>
<option value='od'>Odisha</option>
<option value='pb'>Punjab</option>
<option value='rj'>Rajasthan</option>
<option value='sk'>Sikkim</option>
<option value='tn'>Tamil Nadu</option>
<option value='ts'>Telangana</option>
<option value='tr'>Tripura</option>
<option value='up'>Uttar Pradesh</option>
<option value='uk'>Uttar Khand</option>
<option value='wb'>West Bengal</option>
</select>
<label for="sub_groups"><b>District</b></label>
<select id="sub_groups" name="sub_groups" required>
<option data-group='SHOW' value='0'>-- Select --</option>
<option data-group='ap' value='antpur'>anantapur</option><option data-group='ap' value='ctur'>chittor</option><option data-group='ap' value='egvri'>east godavari</option><option data-group='ap' value='wgvri'>west godavari</option><option data-group='ap' value='gunt'>kadapa</option><option data-group='ap' value='kada'>kadapa</option><option data-group='ap' value='krish'>krishna</option<option data-group='ap' value='kurn'>kurnool</option><option data-group='ap' value='prak'>prakasam</option><option data-group='ap' value='nell'>nellore</option><option data-group='ap' value='srik'>srikakulam</option><option data-group='ap' value='vskp'>vishakapatnam</option><option data-group='ap' value='vzm'>viziangaram</option>
<label>
<input type="checkbox" name="remember" style="margin-bottom:15px" required> By registering, you agree that you are above the age of 18
</label>
<p>By registering with <strong>INDO BLOOD</strong> you agree to our <a href="#" style="color:dodgerblue">Terms & Privacy</a>.</p>
<div class="clearfix">
<button type="button" onclick="document.getElementById('id02').style.display='none'" class="cancelbtn">Cancel</button>
<button type="submit" class="signupbtn">Sign Up</button>
</div>
</div>
</form>
请帮助我编写php文件，该文件将表单数据上传到数据库表中