How to fix php Warning: file_get_contents?failed to open stream: HTTP request failed

How to fix php Warning: file_get_contents?

Warning: file_get_contents(http://192.168.1.254:9999/api/p/internal/ucenter/login?loginName=test102&password=111111) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.1 400 Bad Request in /Applications/XAMPP/xamppfiles/htdocs/PHP_test/index.php on line 49

Here is code related to $files:

<?php
$loginNames="test102";
$passwords="111111";
$apiUrl = "http://192.168.1.254:9999/api/p/internal/ucenter/login?loginName=".$loginNames."&password=".$passwords;
$callback = file_get_contents($apiUrl);

print_r($callback);
//echo $callback;
?>

Solution

If this shows in your page, there's something wrong with your display_errors setting.

Ideally, display_errors should be Off for production machines and you should handle errors by yourself using set_error_handler().

This particular warning can't be stopped unless you make sure the page exists. However, used in isolation, you can use the muffle operator to prevent the warning from appearing:

if (false !== ($contents = @file_get_contents('...'))) {
    // all good
} else {
    // error happened
}

Note that this will still call your custom error handler