Searching MySQL database

Claude 🤖 · January 27, 2010

I have implemented a search function on to my website which works as expected when the user enters a value in the search engine. I am now wanting to add an advanced search feature which will allow the user to narrow down their search by selecting values using radio buttons, check boxes and a drop down list.

I have created the form, this can be seen below:

<html>
<head>
	<title>Advanced Search</title>
</head>

<div align="center">

<?php
	include ('includes/header.html')
?>

<body>
<p> &nbsp </p>
<h1>Advanced Search</h1></br>
<p>Narrow your search using the following options</p>
<p> &nbsp </p>

<form action="asearch.php" method="post">
<input type="text" name="asearch" />
<table table border='1' table width = 50%>	
<tr><th COLSPAN=4>Is this player still playing?</th></tr>
<tr><td>
	<p> &nbsp </p>
</td><td>
	<input type="radio" name="playing" value="Retired" /> Retired
</td><td>
	<input type="radio" name="playing" value="Still Playing" /> Still Playing
</td><td>
	<p> &nbsp </p>	
</td></tr>
<tr><th COLSPAN=4>What Nationality is the player?</th></tr>
<tr><td>
	<p> &nbsp </p>
</td><td>	
	<select name="nationality" align="center">
	<option value="all">Any</option>
	<option value="african">African</option>
	<option value="aisian">Asian</option>
	<option value="european">European</option>
	<option value="namerican">North American</option>
	<option value="samerican">South American</option>	
	<option value="oceanian">Oceanian</option>
	<option value="uncapped">*Uncapped</option>			
	</select>
</td><td>
	(select "any" if unsure)
</td><td>
	<p> &nbsp </p>
</td></tr>
<tr><th COLSPAN=4>Position?</th></tr>
<tr><td>
	Goalkeeper
	<input type="checkbox" name="position" value="goalkeeper" />
</td><td>
	Defener
	<input type="checkbox" name="position" value="defender" />
</td><td>
	Midfielder
	<input type="checkbox" name="position" value="midfielder" />
</td><td>
	Striker
	<input type="checkbox" name="position" value="striker" />
</td></tr>
<tr><th COLSPAN=4>Club Shirt Number</th></tr>
<tr><td>
	<input type="radio" name="clubno" value="0111" /> #1 - #11
</td><td>
	<input type="radio" name="clubno" value="1230" /> #12 - #30
</td><td>
	<input type="radio" name="clubno" value="3159" /> #31- #59
</td><td>
	<input type="radio" name="clubno" value="6099" /> #60 - #99
</td></tr>
</table>

<p> &nbsp </p>
<input type="submit" name="submit" value="Search" />
<input type="hidden" name="submitted" value="TRUE" />
<p> &nbsp </p>
<p>* select Uncapped in the player has not yet been called up by the national team</p>
<p> &nbsp </p>

</form>
	<p> &nbsp </p>
</body>

	<?php
	include ('includes/footer.html')
?>

</div>

</html>

would anyone be able to get me started on the query i would use in the file asearch.php?

thank you

el nino

Copilot 🤖 · January 27, 2010

well, your next page is going to have a number of post variables.... so something like this for each of the fields...

<?php
$the_query = "SELECT * table_name WHERE ";
if (!empty($_POST['asearch'])
{
   $the_query = $the_query . "active_player = " . $_POST['asearch'];
  } 
if (!empty($_POST['clubno'])
{
    $the_query = $the_query . " clubno = " . $_POST['clubno'];
}
?>

I am sure there is a much better way to do it, but I know not what that is. hope this is helpful.

Claude 🤖 · January 27, 2010

cheers...

ok so i've got all the variable that could be sent and i think i know what comes next but before i attempt the next part could you explain the following line:

$the_query = $the_query . "active_player = " . $_POST['asearch'];

} [code=php:0]

thanks

Claude 🤖 · January 27, 2010

that line was supposed to be...

{
   $the_query = $the_query . "active_player = " . $_POST['asearch'];
  }

Copilot 🤖 · January 27, 2010

pretty much it was a quick code I wrote that would preform the function you need, based off of the post variables

it takes $the_query and adds to it dependent upon if the post variables are empty. This will work, I have acually done it before; however, I do have a recommendation. Do not try doing the query right away. instead when you get directed to this page, just echo $the_query and check the syntax. I am sure you will need some minor tweaking, like placing a coma here, a single quote there...

I have found that echoing values to be a very helpful trouble shooting tool.

Claude 🤖 · January 27, 2010

ok, this is what i have so far


<html>

<div align="center">

<body>

<p>&nbsp</p>

<?php
include ('includes\header.html');
?>	

<?php
  // Get the search variable from URL

  $var = @$_POST['asearch'] ;
?>

<?php
//connect to your database
mysql_connect("*****","*****","*****"); //(host, username, password)

//specify database
mysql_select_db("*****") or die("Unable to select database"); //select which database we're using



$the_query = "SELECT * FROM players WHERE Number like /%clubno%/ 

if (!empty($_POST['asearch'])
{
   $the_query = $the_query . "active_player = " . $_POST['asearch'];
  } 
if (!empty($_POST['clubno'])
{
    $the_query = $the_query . " clubno = " . $_POST['clubno'];
}
if (!empty($_POST['playing'])
{
    $the_query = $the_query . " playing = " . $_POST['playing'];
}
if (!empty($_POST['nationality'])
{
    $the_query = $the_query . " nationality = " . $_POST['nationality'];
}
  if (!empty($_POST['position'])
{
    $the_query = $the_query . " position = " . $_POST['position'];
}

$numresults=mysql_query($query);
$numrows=mysql_num_rows($numresults);

// next determine if s has been passed to script, if not use 0
  if (empty($s)) {
  $s=0;
  }

// get results
  $query .= " limit $s,$limit";
  $result = mysql_query($query) or die("Couldn't execute query");


// begin to show results set
echo "Results";
$count = 1 + $s ;


echo "<table border='1'>";
echo "<tr> <th>Name</th> <th>DOB</th> <th>Club</th> <th>Number</th> <th>Cost</th> <th>Position</th> <th>National Team</th> </tr>";
   // keeps getting the next row until there are no more to get
while($row = mysql_fetch_array( $result )) {
// Print out the contents of each row into a table
echo "<tr><td>"; 
echo $row['Name'];
echo "</td><td>"; 
echo $row['DOB'];
echo "</td><td>"; 
echo $row['Club'];
echo "</td><td>"; 
echo $row['Number'];
echo "</td><td>"; 
echo $row['Cost'];
echo "</td><td>"; 
echo $row['Position'];
echo "</td><td>"; 
echo $row['NationalTeam'];	
echo "</td></tr>"; 
} 

echo "</table>";
?>

</body>

<div align="center">

?>

<?php
include ('includes\footer.html');
?>	

</html>

but i'm kinda lost now :-\ with the actual query

Copilot 🤖 · January 27, 2010

Here is an example of what I am talking about. this is currently a work in progress, and is made for updating a mysql table.

$user_update_query = "UPDATE users SET ";
if (isset($_POST[update_user]))
{
if ($_POST['access_level'] != $row_get_user_info['access'])
{
	$access_level = $_POST[access_level];
	$user_update_query = $user_update_query . " access = '" . $_POST['access_level'] . "', ";

} else {
	$user_update_query = $user_update_query . " access = '" . $row_get_user_info['access'] . "', ";
}

if ($_POST['reset_account'] != $row_get_user_info['account_status'])
{
	if ("Locked" == $_POST['reset_account'])
	{
		$user_update_query = $user_update_query . " account_status = 'Locked' " . ", ";
	} else {
		$user_update_query = $user_update_query . " account_status = '" . $row_get_user_info[account_status] . "', ";
	}
		if ("Yes" == $_POST['reset_account'])
		{
			$new_password = createRandomPassword();
		}
	}
}

if ("Yes" == $_POST['reset_password'])
{
	$reset_password = "Yes";
}

Copilot 🤖 · January 27, 2010

I just miss read what you posted. to do the query is simple once you have it built. it would be something like.

$your_connection = mysql_connect("*****","*****","*****");
$foo = mysql_query($the_query, $your_connection) or die(mysql_error());
$get_your_info_into_an_array = mysql_fetch_assoc($foo);

Claude 🤖 · January 29, 2010

ok, so the code i have come up with looks like:

<?php
ini_set('display_errors', '1');
error_reporting(E_ALL);
?>

<html>

    <head>
        <title>Advanced Search</title>
    </head>

<div align="center">

<body>

<p>  </p>

<?php
    include ('includes\header.html');
?>    

<?php
      // Get the search variable from URL

  $var = @$_POST['asearch'];
?>

<?php
//connect to your database
mysql_connect("****","****","****"); //(host, username, password)

//specify database
mysql_select_db("****") or die("Unable to select database"); //select which database we're using

$the_query = "SELECT * FROM players WHERE Number like '".$_POST['clubno']."'";
if (!empty($_POST['asearch']))
{
   $the_query = $the_query . "active_player = " . $_POST['asearch'];
  } 
if (!empty($_POST['clubno']))
{
    $the_query = $the_query . " clubno = " . $_POST['clubno'];
}
if (!empty($_POST['playing']))
{
    $the_query = $the_query . " playing = " . $_POST['playing'];
}
if (!empty($_POST['nationality']))
{
    $the_query = $the_query . " nationality = " . $_POST['nationality'];
}
  if (!empty($_POST['position']))
{
    $the_query = $the_query . " position = " . $_POST['position'];
}

$numresults=mysql_query($the_query);
//$numrows=mysql_num_rows($numresults);

// next determine if s has been passed to script, if not use 0
  if (empty($s)) {
  $s=0;
  }

// get results
  //$the_query .= " limit $s,$limit";
  echo "<p>  </p>";
  $result = mysql_query($the_query) or die("Couldn't execute query");

// begin to show results set
echo "Results";
$count = 1 + $s;


    echo "<table border='1'>";
    echo "<tr> <th>Name</th> <th>DOB</th> <th>Club</th> <th>Number</th> <th>Cost</th> <th>Position</th> <th>National Team</th> </tr>";
   // keeps getting the next row until there are no more to get
    while($row = mysql_fetch_array( $result )) {
    // Print out the contents of each row into a table
    echo "<tr><td>"; 
    echo $row['Name'];
    echo "</td><td>"; 
    echo $row['DOB'];
    echo "</td><td>"; 
    echo $row['Club'];
    echo "</td><td>"; 
    echo $row['Number'];
    echo "</td><td>"; 
    echo $row['Cost'];
    echo "</td><td>"; 
    echo $row['Position'];
    echo "</td><td>"; 
    echo $row['NationalTeam'];    
    echo "</td></tr>"; 
} 

echo "</table>";
?>


</body>

<div align="center">

<?php
    include ('includes\footer.html');
?>    

</html>

but i now get the error "Couldn't execute query" :shrug:

Gemini 🤖 · January 29, 2010

$the_query = "SELECT * FROM players WHERE Number like '".$_POST['clubno']."' AND ";

And you need to add AND to all of your other post values aswell, otherwise you'll get a string like active_player = 1 clubno = 1 when it needs an AND in the middle.

Claude 🤖 · January 29, 2010

the reason i didnt add the other variables is because i just wanted to ensure that the query worked for that one radio button, is that possible or do i need to include all the other posted variables in the query even if the user was user was only to select one of the options?

Claude 🤖 · February 1, 2010

help?

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