Php при ошибке не показывает страницу

<?phpif (!function_exists('http_response_code')) {
        function http_response_code($code = NULL) {

            if (

$code !== NULL) {

                switch (

$code) {
                    case 100: $text = 'Continue'; break;
                    case 101: $text = 'Switching Protocols'; break;
                    case 200: $text = 'OK'; break;
                    case 201: $text = 'Created'; break;
                    case 202: $text = 'Accepted'; break;
                    case 203: $text = 'Non-Authoritative Information'; break;
                    case 204: $text = 'No Content'; break;
                    case 205: $text = 'Reset Content'; break;
                    case 206: $text = 'Partial Content'; break;
                    case 300: $text = 'Multiple Choices'; break;
                    case 301: $text = 'Moved Permanently'; break;
                    case 302: $text = 'Moved Temporarily'; break;
                    case 303: $text = 'See Other'; break;
                    case 304: $text = 'Not Modified'; break;
                    case 305: $text = 'Use Proxy'; break;
                    case 400: $text = 'Bad Request'; break;
                    case 401: $text = 'Unauthorized'; break;
                    case 402: $text = 'Payment Required'; break;
                    case 403: $text = 'Forbidden'; break;
                    case 404: $text = 'Not Found'; break;
                    case 405: $text = 'Method Not Allowed'; break;
                    case 406: $text = 'Not Acceptable'; break;
                    case 407: $text = 'Proxy Authentication Required'; break;
                    case 408: $text = 'Request Time-out'; break;
                    case 409: $text = 'Conflict'; break;
                    case 410: $text = 'Gone'; break;
                    case 411: $text = 'Length Required'; break;
                    case 412: $text = 'Precondition Failed'; break;
                    case 413: $text = 'Request Entity Too Large'; break;
                    case 414: $text = 'Request-URI Too Large'; break;
                    case 415: $text = 'Unsupported Media Type'; break;
                    case 500: $text = 'Internal Server Error'; break;
                    case 501: $text = 'Not Implemented'; break;
                    case 502: $text = 'Bad Gateway'; break;
                    case 503: $text = 'Service Unavailable'; break;
                    case 504: $text = 'Gateway Time-out'; break;
                    case 505: $text = 'HTTP Version not supported'; break;
                    default:
                        exit('Unknown http status code "' . htmlentities($code) . '"');
                    break;
                }$protocol = (isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0');header($protocol . ' ' . $code . ' ' . $text);$GLOBALS['http_response_code'] = $code;

            } else {

$code = (isset($GLOBALS['http_response_code']) ? $GLOBALS['http_response_code'] : 200);

            }

            return

$code;

        }
    }

?>

In this example I am using $GLOBALS, but you can use whatever storage mechanism you like... I don't think there is a way to return the current status code:

https://bugs.php.net/bug.php?id=52555

For reference the error codes I got from PHP's source code:

http://lxr.php.net/opengrok/xref/PHP_5_4/sapi/cgi/cgi_main.c#354

And how the current http header is sent, with the variables it uses:

http://lxr.php.net/opengrok/xref/PHP_5_4/main/SAPI.c#856

The following codes currently work as expected (with PHP running as Apache module):
200 – 208, 226
300 – 305, 307, 308
400 – 417, 422 – 424, 426, 428 – 429, 431
500 – 508, 510 – 511

Codes 0, 100, 101, and 102 will be sent as "200 OK".

Everything else will result in "500 Internal Server Error".

If you want to send responses with a freestyle status line, you need to use the `header()` function:

<?php header("HTTP/1.0 418 I'm A Teapot"); ?>

This happens when using header(0,0,420) and http_response_code(420).
Use header('HTTP/1.1 420 Enhance Your Calm') instead.

Note that the response code in the string IS interpreted and used in the access log and output via http_response_code().

<?php
$http_status_codes = array(100 => "Continue", 101 => "Switching Protocols", 102 => "Processing", 200 => "OK", 201 => "Created", 202 => "Accepted", 203 => "Non-Authoritative Information", 204 => "No Content", 205 => "Reset Content", 206 => "Partial Content", 207 => "Multi-Status", 300 => "Multiple Choices", 301 => "Moved Permanently", 302 => "Found", 303 => "See Other", 304 => "Not Modified", 305 => "Use Proxy", 306 => "(Unused)", 307 => "Temporary Redirect", 308 => "Permanent Redirect", 400 => "Bad Request", 401 => "Unauthorized", 402 => "Payment Required", 403 => "Forbidden", 404 => "Not Found", 405 => "Method Not Allowed", 406 => "Not Acceptable", 407 => "Proxy Authentication Required", 408 => "Request Timeout", 409 => "Conflict", 410 => "Gone", 411 => "Length Required", 412 => "Precondition Failed", 413 => "Request Entity Too Large", 414 => "Request-URI Too Long", 415 => "Unsupported Media Type", 416 => "Requested Range Not Satisfiable", 417 => "Expectation Failed", 418 => "I'm a teapot", 419 => "Authentication Timeout", 420 => "Enhance Your Calm", 422 => "Unprocessable Entity", 423 => "Locked", 424 => "Failed Dependency", 424 => "Method Failure", 425 => "Unordered Collection", 426 => "Upgrade Required", 428 => "Precondition Required", 429 => "Too Many Requests", 431 => "Request Header Fields Too Large", 444 => "No Response", 449 => "Retry With", 450 => "Blocked by Windows Parental Controls", 451 => "Unavailable For Legal Reasons", 494 => "Request Header Too Large", 495 => "Cert Error", 496 => "No Cert", 497 => "HTTP to HTTPS", 499 => "Client Closed Request", 500 => "Internal Server Error", 501 => "Not Implemented", 502 => "Bad Gateway", 503 => "Service Unavailable", 504 => "Gateway Timeout", 505 => "HTTP Version Not Supported", 506 => "Variant Also Negotiates", 507 => "Insufficient Storage", 508 => "Loop Detected", 509 => "Bandwidth Limit Exceeded", 510 => "Not Extended", 511 => "Network Authentication Required", 598 => "Network read timeout error", 599 => "Network connect timeout error");
?>

Source: Wikipedia "List_of_HTTP_status_codes"

<?php
header('HTTP/1.1 401 Unauthorized');
http_response_code(403);
print(http_response_code());
?>

The raw HTTP response will be (notice the actual status code on the first line does not match the printed http_response_code in the body):

HTTP/1.1 401 Unauthorized
Date: Tue, 24 Nov 2020 13:49:08 GMT
Server: Apache
Connection: Upgrade, Keep-Alive
Keep-Alive: timeout=5, max=100
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8

403

I only tested it on Apache. I am not sure if this behavior is specific to Apache or common to all PHP distributions.

        const

<?php
header($_SERVER['SERVER_PROTOCOL'] . ' 507 Insufficient Storage');
?>
result: something like

HTTP/1.1 507 Insufficient Storage

The documentation for the header() function has the right way to implement this if you're still on < php 5.4:

<?php
header("HTTP/1.0 404 Not Found");
?>

In summary - The differences between "http_response_code" and "header" for setting response codes:

1. Using http_response_code will cause PHP to match and apply a Reason Phrase from a list of Reason Phrases that are hard-coded into the PHP source code.

2. Because of point 1 above, if you use http_response_code you must set a code that PHP knows about. You can't set your own custom code, however you can set a custom code (and Reason Phrase) if you use the header method.

<?php// HTTP/1.1 404 Not Found
http_response_code(404);?>

The resulting response is HTTP/1.1 404 OK

$a

<?php

header

('Temporary-Header: True', true, 404);
header_remove('Temporary-Header');?>

if (!function_exists('http_response_code')) {
    function http_response_code($code = NULL) {    
        $prev_code = (isset($GLOBALS['http_response_code']) ? $GLOBALS['http_response_code'] : 200);

        if ($code === NULL) {
            return $prev_code;
        }

        switch ($code) {
            case 100: $text = 'Continue'; break;
            case 101: $text = 'Switching Protocols'; break;
            case 200: $text = 'OK'; break;
            case 201: $text = 'Created'; break;
            case 202: $text = 'Accepted'; break;
            case 203: $text = 'Non-Authoritative Information'; break;
            case 204: $text = 'No Content'; break;
            case 205: $text = 'Reset Content'; break;
            case 206: $text = 'Partial Content'; break;
            case 300: $text = 'Multiple Choices'; break;
            case 301: $text = 'Moved Permanently'; break;
            case 302: $text = 'Moved Temporarily'; break;
            case 303: $text = 'See Other'; break;
            case 304: $text = 'Not Modified'; break;
            case 305: $text = 'Use Proxy'; break;
            case 400: $text = 'Bad Request'; break;
            case 401: $text = 'Unauthorized'; break;
            case 402: $text = 'Payment Required'; break;
            case 403: $text = 'Forbidden'; break;
            case 404: $text = 'Not Found'; break;
            case 405: $text = 'Method Not Allowed'; break;
            case 406: $text = 'Not Acceptable'; break;
            case 407: $text = 'Proxy Authentication Required'; break;
            case 408: $text = 'Request Time-out'; break;
            case 409: $text = 'Conflict'; break;
            case 410: $text = 'Gone'; break;
            case 411: $text = 'Length Required'; break;
            case 412: $text = 'Precondition Failed'; break;
            case 413: $text = 'Request Entity Too Large'; break;
            case 414: $text = 'Request-URI Too Large'; break;
            case 415: $text = 'Unsupported Media Type'; break;
            case 500: $text = 'Internal Server Error'; break;
            case 501: $text = 'Not Implemented'; break;
            case 502: $text = 'Bad Gateway'; break;
            case 503: $text = 'Service Unavailable'; break;
            case 504: $text = 'Gateway Time-out'; break;
            case 505: $text = 'HTTP Version not supported'; break;
            default:
                trigger_error('Unknown http status code ' . $code, E_USER_ERROR); // exit('Unknown http status code "' . htmlentities($code) . '"');
                return $prev_code;
        }

        $protocol = (isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0');
        header($protocol . ' ' . $code . ' ' . $text);
        $GLOBALS['http_response_code'] = $code;

        // original function always returns the previous or current code
        return $prev_code;
    }
}

Test code:
<php
http_response_code(500);  // set the code
var_dump(headers_sent());  // check if headers are sent
http_response_code(200);  // avoid a default browser page

<?php

header

('Status: 404', TRUE, 404);?>

you might wanna do something like
function ehttp_response_code(int $response_code = NULL): int {
    if ($response_code === NULL) {
        return http_response_code();
    }
    if (headers_sent()) {
        throw new Exception('tried to change http response code after sending headers!');
    }
    return http_response_code($response_code);
}

- create a new file in which you include the faulty script:

<?php
error_reporting(E_ALL);
ini_set("display_errors", 1);
include("file_with_errors.php");
?>

- execute this file instead of the faulty script file

now errors of your faulty script should be reported.
this works fine with me. hope it solves your problem as well!

For example

<?php

$a

=$array[20]; // error_reporting() returns 0 in php <8 and 4437 in PHP>=8?>

If you wish to remove notices from the current level, whatever that unknown level might be, use & ~ instead:

<?php
//....
$errorlevel=error_reporting();
error_reporting($errorlevel & ~E_NOTICE);
//...code that generates notices
error_reporting($errorlevel);
//...
?>

^ is the xor (bit flipping) operator and would actually turn notices *on* if they were previously off (in the error level on its left). It works in the example because E_ALL is guaranteed to have the bit for E_NOTICE set, so when ^ flips that bit, it is in fact turned off. & ~ (and not) will always turn off the bits specified by the right-hand parameter, whether or not they were on or off.

display_errors = On
error_reporting = ~E_ALL

to keep no error reporting as default, but be able to change error reporting level in my scripts.
I'm using PHP 4.3.9 and Apache 2.0.

Turns out that the error_log file in the one directory was full (2.0 Gb).  I erased the file and now errors are displayed normally.  It might also help to turn error logging off.

https://techysupport.co/norton-tech-support/

// Report all PHP errors (see changelog)
error_reporting(E_ALL);

// Report all PHP errors
error_reporting(-1);

What is the difference between those two levels?

Please update this article with a clear explanation of the difference and the possible use cases.

<?php
if (substr($_SERVER['SERVER_NAME'], -6) == '.local') {
    ini_set('display_errors', 1);
    ini_set('error_reporting', E_ALL);
    // or error_reporting(E_ALL);
}
?>

<?php
error_reporting(E_ALL);
var_dump(
    error_reporting(), // value of E_ALL,
    @error_reporting() // value is 0
);
?>

The work-around for this was to rename the file and replace the original with a error_reporting() call and then a require() call.

Ex, rename index.php to index.inc.php, then re-create index.php as:

<?php
error_reporting(E_ALL & ~(E_STRICT|E_NOTICE));
require('index.inc.php');
?>

That allows you to alter the error reporting prior to the file being compiled.

I discovered this recently when I was given code from another development firm that triggered several E_STRICT errors and I wanted to disable E_STRICT on a per-page basis.

So if you want to keep a log of all the errors even after page reloads (for help in debugging, maybe), running the PHP development server can be useful.

I do have dozen of old projects and I surely d'ont want to define every variable which I eventually wrote 20y ago.

So two option: let php7 degrade my expensive SSDs writing Gb/hours or implement smthing like server level monitoring ( with auto_[pre-ap]pend_file in php.ini) and turn off E_WARNING

Custom overriding the level of php errors should be super handy and flexible …

<?php error_reporting(-1); ?>

[Editor's Note: This is not quite accurate.

E_ERROR, E_PARSE, E_CORE_ERROR, E_CORE_WARNING, E_COMPILE_ERROR and E_COMPILE_WARNING error levels will be handled as per the error_reporting settings.

All other levels of errors will be passed to the custom error handler defined by set_error_handler().

Zeev Suraski suggests that a simple way to use the defined levels of error reporting with your custom error handlers is to add the following line to the top of your error handling function:

if (!($type & error_reporting())) return;

-zak@php.net]

for php 5 it shows E_ALL^E_STRICT and for other versions just E_ALL

if anyone sees any problems with it please correct this post

<?php

ini_set('error_reporting', version_compare(PHP_VERSION,5,'>=') && version_compare(PHP_VERSION,6,'<') ?E_ALL^E_STRICT:E_ALL);

?>

This is very useful to remember when setting error_reporting levels in httpd.conf:

Use the table above or:

<?php

ini_set("error_reporting", E_YOUR_ERROR_LEVEL);

echo ini_get("error_reporting");

?>



To get the appropriate integer for your error-level. Then use:

php_admin_value error_reporting YOUR_INT

in httpd.conf

I want to share this rather straightforward tip as it is rather annoying for new php users trying to understand why things are not working when the error-level is set to (int) "E_ALL" = 0...

Maybe the PHP-developers should make ie error_reporting("E_ALL"); output a E_NOTICE informative message about the mistake?

<?php
@include 'config.php';
include 'foo.bar';        // non-existent file
?>

config.php
<?php
error_reporting(0);
?>

will throw an error level E_WARNING in relation to the non-existent file (depending of course on your configuration settings).  If the suppressor is removed, this works as expected.

Alternatively using ini_set('display_errors', 0) in config.php will achieve the same result.  This is contrary to the note above which says that the two instructions are equivalent.

If you have a customer error handler that does not output warnings, you may get a white screen of death if a "require" fails.

Example:
<?php
  error_reporting(E_ERROR | E_WARNING | E_PARSE);

  function

myErrorHandler($errno, $errstr, $errfile, $errline) {
    // Do something other than output message.
    return true;
  }$old_error_handler = set_error_handler("myErrorHandler");

  require

"this file does not exist";
?>

To prevent this, simply include E_COMPILE_ERROR in the error_reporting.

<?php
  error_reporting(E_ERROR | E_WARNING | E_PARSE | E_COMPILE_ERROR);
?>

<?php

if($_SERVER['REMOTE_ADDR']=="00.00.00.00")

{

  ini_set('display_errors','On');

}

else

{

  ini_set('display_errors','Off');

}

?>



Just replace 00.00.00.00 with your ip address.

Maybe it is a simply method to understand what a level set on your host

if you are not have access to php.ini file

<?php

$bit = ini_get('error_reporting');

while ($bit > 0) {

    for($i = 0, $n = 0; $i <= $bit; $i = 1 * pow(2, $n), $n++) {

        $end = $i;

    }

    $res[] = $end;

    $bit = $bit - $end;

}

?>



In $res you will have all constants of error reporting

$res[]=int(16) // E_CORE_ERROR

$res[]=int(8)    // E_NOTICE

...

<?php
function test_ref(&$var,$test_function='',$negate=false) {
    $stat = true;
    if(!isset($var)) $stat = false;
    if (!empty($test_function) && function_exists($test_function)){
        $stat = $test_function($var);
        $stat = ($negate) ? $stat^1 : $stat;
    }
    elseif($test_function == 'empty') {
        $stat = empty($var);
        $stat = ($negate) ? $stat^1 : $stat;
    }
    elseif (!function_exists($test_function)) {
        $stat = false;
        trigger_error("$test_function() is not a valid function");
    }
    $stat = ($stat) ? true : false;
    return $stat;
}
$a = '';
$b = '15';test_ref($a,'empty',true);  //False
test_ref($a,'is_int');  //False
test_ref($a,'is_numeric');  //False
test_ref($b,'empty',true);  //true
test_ref($b,'is_int');  //False
test_ref($b,'is_numeric');  //false
test_ref($unset,'is_numeric');  //false
test_ref($b,'is_number');  //returns false, with an error.
?>

Creating a Custom Error Handler

set_error_handler("customError",E_ALL);
function customError($errno, $errstr)
  {
  echo "<b>Error:</b> [$errno] $errstr<br>";
  echo "Ending Script";
  die();
  }