Sitemde gelişmiş bir arama yapmayı deniyorum, ancak boş bir alan varsa kullanıcı aramayı gönderdiğinde NULL olarak gönderilir. Boş parametreleri nasıl hariç tutacağımı bilmiyorum. Aşağıda Gelişmiş Arama PHP, MySQL
arama için biçimidir: Sorgu Aşağıda<form>
<div class="form-group">
<div class="col-sm-2">
<label for="Author" class="control-label">Author</label>
</div>
<div class="col-sm-10">
<input type="text" class="form-control" id="author" placeholder="Author" name="author">
</div>
</div>
<div class="form-group has-feedback">
<div class="col-sm-2">
<label for="isbn" class="control-label">ISBN</label>
</div>
<div class="col-sm-10">
<input type="text" class="form-control" id="isbn" placeholder="ISBN" name="isbn">
</div>
</div>
<div class="form-group">
<div class="col-sm-2">
<label for="genre" class="control-label">Genre</label>
</div>
<div class="col-sm-10">
<input type="text" class="form-control" id="genre" placeholder="Genre" name="genre">
</div>
</div>
<div class="form-group">
<div class="col-sm-2">
<label for="tags" class="control-label">Tags</label>
</div>
<div class="col-sm-10">
<input type="text" class="form-control" id="tags" placeholder="Tags" name="tags">
</div>
</div>
<div class="form-group">
<div class="col-sm-2">
<label for="location" class="control-label">Location</label>
</div>
<div class="col-sm-10">
<input type="text" class="form-control" id="location" placeholder="Location" name="location">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" name="AdvancedSearch" value="Search" class="btn btn-block btn-lg btn-primary">Search</button>
</div>
</div>
</form>
geçerli: Herşeyden
$sql = "select *
from Book_info
where user_id=$u_id
AND title like '%$_REQUEST[title]%'
AND location like '%$_REQUEST[location]%'
AND author like '%$_REQUEST[author]%'
AND tags like '%$_REQUEST[tags]%'
AND genre like '%$_REQUEST[genre]%'
OR ISBN='$_REQUEST[isbn]'";