(PHP Extension) Manually Follow HTTP Redirects

Demonstrates how to manually follow redirects for an HTTP GET.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux

<?php

include("chilkat.php");

$success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$http = new CkHttp();

// The FollowRedirects property controls whether redirects
// are automatically followed.  The default behavior is to
// automatically follow redirects.

// Explicitly set FollowRedirects so that redirects are NOT automatically taken:
$http->put_FollowRedirects(false);

$resp = new CkHttpResponse();
$success = $http->HttpNoBody('GET','http://yandex.ru/',$resp);
if ($success == false) {
    print $http->lastErrorText() . "\n";
    exit;
}

$status = $resp->get_StatusCode();
print 'HTTP Response Status: ' . $status . "\n";

// The FinalRedirectUrl property will contain the redirect URL
// If FollowRedirects was equal to true, then all of the 
// intermediate redirects (if any) would be followed until
// there were no more redirects.  However, because 
// FollowRedirects is not true, FinalRedirectUrl contains
// the next redirect URL.

$loopCount = 0;

while (($status == 302)) {

    print 'Redirect URL: ' . $http->finalRedirectUrl() . "\n";

    $nextUrl = $http->finalRedirectUrl();
    $success = $http->HttpNoBody('GET',$nextUrl,$resp);
    if ($success == false) {
        print $http->lastErrorText() . "\n";
        exit;
    }

    $status = $resp->get_StatusCode();
    print 'HTTP Response Status: ' . $status . "\n";

    // For safety, prevent infinite loops by
    // keeping a loopCount and only allows following a max 
    // of 10 redirects:
    $loopCount = $loopCount + 1;
    if ($loopCount > 10) {
        print 'Too many redirects.' . "\n";
        exit;
    }

}


?>