带有选项的编码PHP/MYSQL搜索的最佳方法 [英] Best way to code PHP/MYSQL search with options

问题描述

因此，我正在构建一个搜索表单，其中有很多选项供用户选择.如您从下面的图像中看到的，用户选择一个搜索条件，并允许他们输入或查看他们喜欢的内容.如果未选中，则会删除所有值/取消选中所有复选框.

So I am building a search form which has a lot of options for users to select from. As you can see from the image below a user selects a search criteria and it allows them to enter or check what they like. If this is unticked it removes all values/unchecks all the boxes.

我最初只搜索体重/身高/性别，但此后又添加了更多内容.

I originally only had weight/height/gender as the search but since then have added more.

我已经对体重/身高/性别搜索选项进行了编码，结果结束了很多if语句检查了选择的内容/是否为空，然后创建了相应的MYSQL查询.

I already coded the weight/height/gender search options and it ended being a lot of if statements checking what was selected/null then creating the appropriate MYSQL queries.

对于其他选项，我不确定如何继续(如果我应该重新开始).有没有更容易解决的办法?我只需要一些指导，这样我就可以使它更有效.

I am not entirely sure how I should go about (if I should start again) with the rest of the options. Is there an easier away around this? I just need some direction so I can make this a bit more effective.

谢谢！

require 'functions.php';
	
	//Search data
	//$weight_min = $_POST['weight_min'];
	//$weight_max = $_POST['weight_max'];
	//$height_min = $_POST['height_min'];	
	//$height_max = $_POST['height_max'];
	//$gender_select = $_POST['gender_select'];
	
	if("" == trim($_POST['weight_min'])){
    	$weight_min = '';
	}
	else
	{
		$weight_min = $_POST['weight_min'];
	}
	
	if("" == trim($_POST['weight_max'])){
    	$weight_max = '';
	}
	else
	{
		$weight_max = $_POST['weight_max'];
	}
	
	if("" == trim($_POST['height_min'])){
    	$height_min = '';
	}
	else
	{
		$height_min = $_POST['height_min'];
	}
	
	if("" == trim($_POST['height_max'])){
    	$height_max = '';
	}
	else
	{
		$height_max = $_POST['height_max'];
	}
	
	if (!isset($_POST['gender_select'])){
    	
		$gender_select = '';
	}
	else
	{
		$gender_select = $_POST['gender_select'];
	}
	
	//Show test 
	//echo "sent: weight-min: " .$weight_min. " weight-max: " .$weight_max. " height-min: ".$height_min." height-max: ".$height_max." gender-select: ".$gender_select."<p>";
	
	check_null_values($weight_min, $weight_max, $height_min, $height_max, $gender_select);
	

	function check_null_values($weight_min, $weight_max, $height_min, $height_max, $gender_select)
	{
		//Weight
		if($weight_min !=null && $weight_max != null && $height_min == null && $height_max == null && $gender_select == null)
		{
			select_weight($weight_min, $weight_max);
			//echo "select_weight";
		}
		//Height
		else if($weight_min == null && $weight_max == null && $height_min != null && $height_max != null && $gender_select == null)
		{
			select_height($height_min, $height_max);
			//echo "select_height";
		}	
		//Gender
		else if($weight_min == null && $weight_max == null && $height_min == null && $height_max == null && $gender_select != null)
		{
			select_gender($gender_select);
			//echo "select_gender";
		}
		//Weight + Height
		else if($weight_min != null && $weight_max != null && $height_min != null && $height_max != null && $gender_select == null)
		{
			select_weight_height($weight_min, $weight_max, $height_min, $height_max);
			//echo "select_weight_height";
		}
		//Weight + Gender
		else if($weight_min != null && $weight_max != null && $height_min == null && $height_max == null && $gender_select != null)
		{
			select_weight_gender($weight_min, $weight_max, $gender_select);
			//echo "select_weight_gender";
		}
		//Height + Gender
		else if($weight_min == null && $weight_max == null && $height_min != null && $height_max != null && $gender_select != null)
		{
			select_height_gender($height_min, $height_max, $gender_select);
			//echo "select_height_gender";
		}
		//All
		else if($weight_min != null && $weight_max != null && $height_min != null && $height_max != null && $gender_select != null)
		{
			select_all($weight_min, $weight_max, $height_min, $height_max, $gender_select);
			//echo "select_all";
		}
		else if($weight_min == null && $weight_max == null && $height_min == null && $height_max == null && $gender_select == null)
		{
			select_none();
			//echo "select_none";
		}
		else
		{
			//echo "Please enter missing parameter";
		}
	
	
	}

//Weight only selected
	function select_weight($weight_min, $weight_max)
	{
		include 'db_connect.php';
		$result = mysqli_query($db, 
		"SELECT * FROM character_information 
		WHERE 
		(char_min_weight BETWEEN '".$weight_min."' AND '" .$weight_max."'
		OR char_max_weight BETWEEN '".$weight_min."' AND '" .$weight_max."')
		OR
		('".$weight_min."' BETWEEN char_min_weight AND char_max_weight
		OR '" .$weight_max."' BETWEEN char_min_weight AND char_max_weight)
		");
		
		return get_result($result);
	}
	
	//Height only selected
	function select_height($height_min, $height_max)
	{
		include 'db_connect.php';
		$result = mysqli_query($db, 
		"SELECT * FROM character_information 
		WHERE 
		(char_min_height BETWEEN '".$height_min."' AND '" .$height_max."'
		OR char_max_height BETWEEN '".$height_min."' AND '" .$height_max."')
		OR
		('".$height_min."' BETWEEN char_min_height AND char_max_height
		OR '" .$height_max."' BETWEEN char_min_height AND char_max_height)
		");
		
		get_result($result);
	}
	
	//Gender only selected
	function select_gender($gender_select)
	{
		include 'db_connect.php';
		
		$result = mysqli_query($db, 
		"SELECT * FROM character_information 
		WHERE char_gender = '".$gender_select."'
		");	
		
		get_result($result);	
		
	}
	
	//Weight + Height selected
	function select_weight_height($weight_min, $weight_max, $height_min, $height_max)
	{
		include 'db_connect.php';
		
		$result = mysqli_query($db, 
		"SELECT * FROM character_information 
		WHERE 
		((char_min_weight BETWEEN '".$weight_min."' AND '" .$weight_max."'
		OR char_max_weight BETWEEN '".$weight_min."' AND '" .$weight_max."')
		OR
		('".$weight_min."' BETWEEN char_min_weight AND char_max_weight
		OR '" .$weight_max."' BETWEEN char_min_weight AND char_max_weight))
		AND
		((char_min_height BETWEEN '".$height_min."' AND '" .$height_max."'
		OR char_max_height BETWEEN '".$height_min."' AND '" .$height_max."')
		OR
		('".$height_min."' BETWEEN char_min_height AND char_max_height
		OR '" .$height_max."' BETWEEN char_min_height AND char_max_height))
		");	
		
		get_result($result);
	}

推荐答案

我正在使用这种方式:

if(empty($_GET['weightMin'])) {
    $weightMin= null;
} else $weightMin= $_GET['weightMin'];

if(empty($_GET['weightMax'])) {
    $weightMax= null;
} else $weightMin= $_GET['weightMax'];

语句将是:

SELECT * FROM TABLE 
WHERE ((weight >= :weighttMin AND weight <= :weightMax) OR (weight >= :weightMin AND :weightMax is null) OR (weight <= :weightMax AND :weightMin is null) OR (:weightMax is null AND :weightMin is null))

当它是x<时，这相当长.过滤器< y

This is pretty long when it is x < filter < y

否则，如果只是性别"之类的一种类型:

Else if this is only one type like 'Gender' :

if(empty($_GET['gender'])) {
    $gender = null;
} else $gender = $_GET['gender'];

SQL:

SELECT * FROM TABLE
WHERE (gender = :gender or :gender is null)

如果选择了性别，它将搜索出正确的性别，否则返回true，并且不会影响您的陈述.

If gender is selected, it will search the good one, else it returns true and doesn't impact your statement.

组合查询:

SELECT * FROM TABLE 
WHERE
((weight >= :weighttMin AND weight <= :weightMax) OR (weight >= :weightMin AND :weightMax is null) OR (weight <= :weightMax AND :weightMin is null) OR (:weightMax is null AND :weightMin is null))
AND
(gender = :gender or :gender is null)

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