如何使用PHP搜索栏检索MySQL数据库数据

Question

我已经创建了一个使用PHP的搜索栏，我想检索我在MySQL数据库中的数据。

我的代码如下：

<?php 

$button = $_GET ['submit']; 
$search = $_GET ['search']; 

if(!$button) 
echo "You searched for '<b>$search</b>' <hr size='1'</br>"; 
$con=mysqli_connect("localhost", "root", "root", "PM_DB"); 

if (mysqli_connect_errno()) { 
echo "Failed to connect to MySQL: " . mysqli_connect_error(); 
} 

$search_exploded = explode (" ", $search); 

foreach($search_exploded as $search_each) 
{ 
$x++; 
if($x==1) 
$construct .="keywords LIKE '%$search_each%'"; 
else 
$construct .="AND keywords LIKE '%$search_each%'"; 

} 

$construct ="SELECT * FROM Leads WHERE $construct"; 
$run = mysqli_query($construct); 

$foundnum = mysqli_num_rows($run); 

if ($foundnum==0) 
echo "There are no results for <b>'$search'</b>. Please check your spelling."; 
else 
{ 
echo "$foundnum results found !<p>"; 

while($runrows = mysqli_fetch_assoc($run)) 
{ 
$Company = $runrows['Clients']; 

echo "<a href='$Company'><b>Company</b></a><br>"; 

} 
} 

?> 

的每一次点击搜索它只返回错误信息。我错过了什么？任何建议将不胜感激！谢谢 - Tijger。

Answer 1

试试这个代码

$search_exploded = explode(" ", $search); 

$construct = "SELECT * FROM Leads WHERE keywords LIKE "; 
$construct .= "'%".implode("%' OR '%", $search_exploded)."%'"; 

$run = mysqli_query($construct); 

Live demo

Answer 2

正如我所要求的代码从OP

我评论两线，分别造成误差为他

他被执行权查询，然后再次错误的查询...这就是为什么没有返回结果。

<?php 
     $button = $_GET ['submit']; 
     $search = $_GET ['search']; 

     if (!$button) 
      echo "You searched for '<b>$Search</b>' <hr size='1'</br>"; 
     $con = mysqli_connect("localhost", "root", "root", "PM_DB"); 

     if (mysqli_connect_errno()) { 
      echo "Failed to connect to MySQL: " . mysqli_connect_error(); 
     } 

     $search_exploded = explode(" ", $search); 

     $construct = "SELECT * FROM Leads WHERE keywords LIKE "; 
     $construct .= "'%" . implode("%' OR '%", $search_exploded) . "%'"; 

     $run = mysqli_query($construct) or die(mysql_error()); 

     // Why thisssssssssssssssssss??????????? OMG 
     //$construct = "SELECT * FROM Leads WHERE $construct"; 
     //$run = mysqli_query($construct); 

     $foundnum = mysqli_num_rows($run) or die(mysql_error()); 

     if ($foundnum == 0) 
      echo "There are no results for <b>'$search'</b>. Please check your spelling."; 
     else { 
      echo "$foundnum results found !<p>"; 

      while ($runrows = mysqli_fetch_assoc($run)) { 
       $Company = $runrows['Clients']; 

       echo "<a href='$Company'><b>Company</b></a><br>"; 
      } 
     } 
     ?>