javascript - Ajax search doesnt connect to database -


iam trying make live ajax search . when put word automatically shows suggestions bellow w3schools. reason index file , php doesnt exchange data value or database doesnt connect reason.what "no country found". can check code errors? php file :

<?php include_once('dbconnect.php'); $q = intval($_get['q']);     $query = mysqli_query($conn,"select * `users` usercountry '%".$q."%'");          $count = mysqli_num_rows($query); //replace table_name table name , `thing_to_search` column want search     if($count == "0" || $q == ""){         $s[] = "no country found!";     }else{                 while($row = mysqli_fetch_array($query)){         $s[] = $row['usercountry']; // replace column_to_display column want results                  }          } for($x = 0; $x < $count; $x++) {           echo $s[$x];           echo "<br>"; } ?>

and index.php file :

<head>       <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>       <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">       <link rel="stylesheet" href="/resources/demos/style.css">       <script src="https://code.jquery.com/jquery-1.12.4.js"></script>       <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <script> function showcountry(str) {     if (str == "") {         document.getelementbyid("txthint").innerhtml = "";         return;     } else {          if (window.xmlhttprequest) {             // code ie7+, firefox, chrome, opera, safari             xmlhttp = new xmlhttprequest();         } else {             // code ie6, ie5             xmlhttp = new activexobject("microsoft.xmlhttp");         }         xmlhttp.onreadystatechange = function() {             if (this.readystate == 4 && this.status == 200) {                 document.getelementbyid("txthint").innerhtml = this.responsetext;             }         };         xmlhttp.open("get","indexsearchquery.php?q="+str,true);         xmlhttp.send();     } } </script> <input id="search-box" name="q" type="text" autocomplete="off" placeholder="search country..." onchange="showcountry(this.value)" />        <input type='image' name='search' id="search-icon" value='submit' src="search-icon.png" >        <p style="color:white;">suggestions: <span id="txthint" ></span></p>

your country name not in integer. convert intval change php file to

include_once('dbconnect.php'); $q = $_get['q']; //<-----remove intval     $query = mysqli_query($conn,"select * `users` usercountry '%".$q."%'");          $count = mysqli_num_rows($query); //replace table_name table name , `thing_to_search` column want search     if($count == "0" || $q == ""){         $s[] = "no country found!";     }else{                 while($row = mysqli_fetch_array($query)){         $s[] = $row['usercountry']; // replace column_to_display column want results                  }          } for($x = 0; $x < $count; $x++) {           echo $s[$x];           echo "<br>"; }

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