如何从另一个页面获取$ _GET url参数

我有fetch.php和index.php，fetch php用于将数据库中的内容与ajax脚本一起动态加载到index.php中，我想过滤结果如果它存在，则根据搜索词进行加载。

我已经试过

$search = $_GET['searchterm'];

然后结合$搜索到的SQL查询，但我有两个问题：

1 - 它试图从fetch.php得到_GET参数而参数是上的index.php

2-它示出了当该查询是用来加载所有的结果没有任何搜索项输入的误差

<?php 
include("config.php"); //include config file 
//sanitize post value 
$page_number = filter_var($_POST["page"], FILTER_SANITIZE_NUMBER_INT, FILTER_FLAG_STRIP_HIGH); 

//throw HTTP error if page number is not valid 
if(!is_numeric($page_number)){ 
    header('HTTP/1.1 500 Invalid page number!'); 
    exit(); 
} 
//get current starting point of records 
$position = (($page_number-1) * $item_per_page); 

//fetch records using page position and item per page. 
$results = $mysqli->prepare("SELECT name, location, score, img, id, type FROM artists " 
if(isset($_GET['searchterm'])){ 

} 
" ORDER BY score DESC LIMIT ?, ?"); 

//bind parameters for markers, where (s = string, i = integer, d = double, b = blob) 
//for more info https://www.sanwebe.com/2013/03/basic-php-mysqli-usage 
$results->bind_param("ii", $position, $item_per_page); 
$results->execute(); //Execute prepared Query 
$results->bind_result($name, $location, $score, $img, $id, $type); //bind variables to prepared statement 

//output results from database 

while($results->fetch()){ //fetch values 
    echo "<div class=\"card feed_item\" style=\"width: 20rem;\"><a id=\"wraplink\" href=\"profile.php?id=". $id."\">"; 
    echo "<img class=\"card-img-top feed_img\" src=\"img/" . $img . ".jpg\" alt=\"Card image cap\">"; 
    echo "<div class=\"card-block\">"; 
    echo "<h4 class=\"card-title\">" . $name . "</h4>"; 
    echo "<p class=\"card-text\">" . $location . "</p>"; 
    echo "</div><div class=\"card-footer\">"; 
    echo "<small class=\"text-muted\">". $type ."</small>"; 
    echo "</div>"; 
    echo "</a></div>"; 
} 
?>

及以下的index.php

<?php 
// including the config file 
include('config.php'); 
?> 
<!DOCTYPE html> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>Setch</title> 
<script 
    src="https://code.jquery.com/jquery-3.2.1.min.js" 
    integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" 
    crossorigin="anonymous"></script> 
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous"> 
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script> 
<link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet"> 
<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css" rel="stylesheet"> 
<link rel="stylesheet" href="css/style.css" /> 
</head> 
<body> 
<div id="wrappy"> 

    <!-- navbar --> 
    <nav class="navbar navbar-toggleable-sm navbar-light bg-faded"> 
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation"> 
    <span class="navbar-toggler-icon"></span> 
    </button> 
    <a class="navbar-brand" id="logo" href="index.php">Setch</a> 
    <div class="collapse navbar-collapse" id="navbarTogglerDemo02"> 
    <ul class="navbar-nav mr-auto mt-2 mt-md-0"> 
    <li class="nav-item active"> 
     <a class="nav-link" href="#">Add Artist <span class="sr-only">(current)</span></a> 
    </li> 
    <li class="nav-item"> 
     <a class="nav-link" href="#">Feedback</a> 
    </li> 
    <li class="nav-item"> 
     <a class="nav-link" href="#">About</a> 
    </li> 
    </ul> 
    <form class="form-inline my-2 my-lg-0 input-group" action="search.php" method="get"> 
    <input class="form-control mr-sm-2" type="text" name="searchterm" placeholder="Search" id="search"> 
    <button class="btn btn-outline-success my-2 my-sm-0" type="submit" name="search">Search</button> 
    </form> 
    <div id="back_result"></div> 
    </div> 
    </nav> 
<div class="container"> 
<!-- buttons --> 
<br> 
<div class="row justify-content-md-center"> 
    <div class="col col-lg-3 justify-content-md-center"><button id="ph" type="button" class="btn btn-secondary btn-lg">Photographers</button></div> 
    <div class="col col-lg-3 justify-content-md-center"><button id="mk" type="button" class="btn btn-secondary btn-lg">Makeup Artists</button></div> 
</div></div> 

<!-- cards --> 
<div id="feed"> 

<!-- artists are here --> 
</div> 
<!-- content --> 
<div class="loading"><img src="img/load.gif" /> 
</div><!-- container --> 
</div> 
<script src="js/script.js"> </script> 
</body> 
</html>

还的script.js

var track_page = 1; //track user scroll as page number, right now page number is 1 
var loading = false; //prevents multiple loads 
var fetch = 'fetch_pages.php'; 
load_contents(track_page); //initial content load 

$(window).scroll(function() { //detect page scroll 
    if($(window).scrollTop() + $(window).height() >= $(document).height()) { //if user scrolled to bottom of the page 
     track_page++; //page number increment 
     load_contents(track_page); //load content 
    } 
}); 
//Ajax load function 
function load_contents(track_page){ 
    if(loading == false){ 
     loading = true; //set loading flag on 
     $('.loading').show(); //show loading animation 
     $.post(fetch, {'page': track_page}, function(data){ 
      loading = false; //set loading flag off once the content is loaded 
      if(data.trim().length == 0){ 
       //notify user if nothing to load 
       $('.loading').html(""); 
       return; 
      } 
      $('.loading').hide(); //hide loading animation once data is received 
      $("#feed").append(data); //append data into #results element 

     }).fail(function(xhr, ajaxOptions, thrownError) { //any errors? 
      alert(thrownError); //alert with HTTP error 
     }) 
    } 
}

来源

2017-06-21 Krim

你还可以添加index.php代码吗？ – Kenath

以上代码代表index.php或fetch.php？并且在查询之间存在一个if条件，请检查。 –

“fetch php用于将数据库中的内容动态加载到index.php中” - 我无法从中提取任何含义。我觉得你通过AJAX加载'fetch.php'并且希望传输GET参数给AJAX调用，但是没有JavaScript标记或者JavaScript代码（但是还有一个MySQL代码），所以我可能是错的。附注：'“”。 $ type。“”;'让我的眼睛流血。为什么使用双引号字符串（因此需要转义每个引用），然后不使用可变插值？ –