[SOLVED] How to remove the following PHP errors from the website?

How to remove the following PHP errors from the website?

<?php

$weather = "";
$error = "";
// if($_GET["city"]){ 
    // better way -->
    if(array_key_exists('city',$_GET))
    {
    $city = str_replace(' ','',$_GET['city']);

    $file_headers = @get_headers("https://www.weather-forecast.com/locations/".$city."/forecasts/latest");

    if($file_headers[0] == 'HTTP/1.1 404 Not Found'){
        $error = "City couldn't be found";
    }
    else{
    $forcastPage = file_get_contents("https://www.weather-forecast.com/locations/".$city."/forecasts/latest");
    
    $pageArray = explode('3 days)</div><p class="b-forecast__table-description-content"><span class="phrase">',$forcastPage);

    if(sizeof($pageArray) >1){
    $secondPageArray = explode('</span></p></td>',$pageArray[1]);
    if(sizeof($secondPageArray)>1){
    $weather =  $secondPageArray[0];
    }
    else{
        $error = "City couldn't be found";
    }
    }
    else{
        $error = "City couldn't be found";
    }
}

    }

?>

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Weather Scraper</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-KK94CHFLLe+nY2dmCWGMq91rCGa5gtU4mk92HdvYe+M/SXH301p5ILy+dN9+nJOZ" crossorigin="anonymous">
    <style>
        html{
            background: url(sunset.avif) no-repeat center center fixed;
            background-size: cover;
        }
        body{
            background:none;
        }
        .container{
            text-align:center;
            margin-top: 100px;
            width:450px;
        }
        input{
            margin:20px 0;
        }
        #weather{
            margin-top: 15px;
        }
    </style>
</head>
  <body>
    <div class="container">
        <h1>What's the weather?</h1>
        <form>
  <div class="mb-3">
    <label for="city" class="form-label">Enter the name of a city</label>
    <input type="text" name="city" class="form-control" id="city" placeholder="Eg. London , Tokyo" 
    value = "<?php
    if(array_key_exists('city',$_GET))
    {
     echo $_GET["city"];
    }
     ?>">
    
  </div>
  <button type="submit" class="btn btn-primary">Submit</button>
</form> 
<div id="weather">
    <?php 
    if($weather){
        echo '<div class="alert alert-success" role="alert">
        '.$weather.'
      </div>';
    }
    else if($error){
        echo '<div class="alert alert-danger" role="alert">
        '.$error.'
      </div>';
    }
    ?>
</div>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ENjdO4Dr2bkBIFxQpeoTz1HIcje39Wm4jDKdf19U8gI4ddQ3GYNS7NTKfAdVQSZe" crossorigin="anonymous"></script>
  </body>
</html>

When I ran this code on my local server it ran without any errors and showed the output.But I hosted the webiste on 000webhost, website link:https://overprotective-gard.000webhostapp.com/?city=china

The following errors are coming:

Warning: file_get_contents(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in /storage/ssd4/367/20650367/public_html/index.php on line 17

Warning: file_get_contents(): Failed to enable crypto in /storage/ssd4/367/20650367/public_html/index.php on line 17

Warning: file_get_contents(https://www.weather-forecast.com/locations/london/forecasts/latest): failed to open stream: operation failed in /storage/ssd4/367/20650367/public_html/index.php on line 17

Can somebody please look into the code and help me to remove the errors?

Solution

Read this OpenSSL changes in PHP 5.6.x

Try to change in your code like below

$arrContextOptions = array(
    "ssl" => array(
        "verify_peer" => false,
        "verify_peer_name" => false,
    ),
);  

$forcastPage = file_get_contents("https://www.weather-forecast.com/locations/".$city."/forecasts/latest", false, stream_context_create($arrContextOptions));