working - php.ini display_errors




How do I get PHP errors to display? (16)

I have checked my PHP ini file and display errors is set and also error reporting is E_ALL. I have restarted my Apache web server.

I have even put these lines at the top of my script, and it doesn't even catch simple parse errors. For example, I declare variables with a "$" and I don't close statements";". But all my scripts show a blank page on these errors, but I want to actually see the errors in my browser output.

error_reporting(E_ALL);
ini_set('display_errors', 1);

What is left to do?


As we are now running PHP7, answers given here are not correct anymore. The only one still OK is the one from Frank Forte, as he talks about PHP7. On the other side, rather than trying to catch error with a try/catch you can use a trick: use include. Here 3 pieces of code:

File: tst1.php

<?php
error_reporting(E_ALL);
ini_set('display_errors','On');
// Missing " and ;
echo "Testing
?>  

Running this in PHP7 will show nothing

Now, try this:

File: tst2.php

<?php
error_reporting(E_ALL);
ini_set('display_errors','On');
include ("tst3.php");
?> 

File: tst3.php

<?php
// Missing " and ;
echo "Testing
?>  

Now run tst2 which set the error reporting then include tst3. You will see:

Parse error: syntax error, unexpected end of file, expecting variable (T_VARIABLE) or ${ (T_DOLLAR_OPEN_CURLY_BRACES) or {$ (T_CURLY_OPEN) in tst3.php on line 4


Create a file called php.ini in the folder where your PHP file resides.

Inside php.ini add the following code (I am giving an simple error showing code):

display_errors = on

display_startup_errors = on

I would usually go with the following code in my plain php project which are very small, if the project grows large then I will recommend.

if(!defined('ENVIRONMENT')){
    define('ENVIRONMENT','DEVELOPMENT');
}

$base_url   =   null;

if (defined('ENVIRONMENT'))
{
    switch (ENVIRONMENT)
    {
        case 'DEVELOPMENT':
            $base_url   =   'http://localhost/product/';
            ini_set('display_errors',1);
            ini_set('display_startup_errors',1);
            error_reporting(E_ALL|E_STRICT);
            break;

        case 'PRODUCTION':
            $base_url   =   'Prod url'; /* https://google.com */
            error_reporting(0);
            /* Mechanism to log errors */
            break;

        default:
            exit('The application environment is not set correctly.');
    }
}

Hope this helps.


If you somehow find yourself in a situation where you can't modifiy the setting via php.ini or .htaccess you're out of luck for displaying errors when your PHP scripts contain parse errors. You'd then have to resolve to linting the files on the command line like this:

find . -name '*.php' -type f -print0 | xargs -0 -n1 -P8 php -l | grep -v "No syntax errors"

If your host is so locked down that it does not allow changing the value via php.ini or .htaccess, it may also disallow changing the value via ini_set. You can check that with the following PHP script:

<?php
if( !ini_set( 'display_errors', 1 ) ) {
  echo "display_errors cannot be set.";
} else {
  echo "changing display_errors via script is possible.";
}

Inside your php.ini:

display_errors = on

Then restart your web server.


Just write:

error_reporting(-1);

Some web hosting providers allow you to change PHP params in the .htaccess file.

You can add the following line:

php_value display_errors 1

I had the same issue as yours and this solution fixed it.


That's what I learnt. In PHP.INI file

error_reporting = E_ALL
display_errors = On

This always works for me:

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

However, this doesn't make PHP to show parse errors - the only way to show those errors is to modify your php.ini with this line:

display_errors = on

This code on top should work error_reporting(E_ALL);

However try to edit the code on phone in file

error_reporting =on


To display all errors you need to:

1. Have these lines in the PHP script you're calling from the browser (typically index.php):

error_reporting(E_ALL);
ini_set('display_errors', '1');

2.(a) Make sure that this script has no syntax errors

—or—

2.(b) Set display_errors = On in your php.ini

Otherwise, it can't even run those 2 lines!

You can check for syntax errors in your script by running (at the command line):

php -l index.php

If you include the script from another PHP script then it will display syntax errors in the included script. For example:

index.php

error_reporting(E_ALL);
ini_set('display_errors', '1');

// Any syntax errors here will result in a blank screen in the browser

include 'my_script.php';

my_script.php

adjfkj // This syntax error will be displayed in the browser

Use:

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

This is the best way to write it, but a syntax error gives blank output, so use the console to check for syntax errors. The best way to debug PHP code is to use the console; run the following:

php -l phpfilename.php

You can add your own custom error handler, which can provide extra debug info. Furthermore you can set it up to send you via email.

function ERR_HANDLER($errno ,$errstr, $errfile, $errline){
    $msg="<b>Someting bad happened.</b> [$errno] $errstr <br><br>
    <b>File:</b> $errfile <br>
    <b>Line:</b> $errline <br>
    <pre>".json_encode(debug_backtrace(), JSON_PRETTY_PRINT)."</pre> <br>";

    echo $msg;

    return false;
}

function EXC_HANDLER($exception){
    ERR_HANDLER(0,$exception->getMessage(),$exception->getFile(),$exception->getLine());
}

function shutDownFunction() {
    $error = error_get_last();
    if ($error["type"] == 1) {
        ERR_HANDLER($error["type"],$error["message"],$error["file"],$error["line"]);
    }
}

set_error_handler ("ERR_HANDLER", E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED);
register_shutdown_function("shutdownFunction");
set_exception_handler("EXC_HANDLER");

You can do something like below :

Set below parameters in your main index file

    ini_set('display_errors', 1);
    ini_set('display_startup_errors', 1);

Then based on your requirement you can choose which you want to show :

For All Error, Warning and Notice

    error_reporting(E_ALL); OR error_reporting(-1);

For All Errors

    error_reporting(E_ERROR);

For All Warnings

    error_reporting(E_WARNING);

For All Notice

    error_reporting(E_NOTICE);

For More Info check here


You might find all of the settings for "error reporting" or "display errors" do not appear to work in PHP 7. That is because error handling has changed. Try this instead:

try{
     // Your code
} 
catch(Error $e) {
    $trace = $e->getTrace();
    echo $e->getMessage().' in '.$e->getFile().' on line '.$e->getLine().' called from '.$trace[0]['file'].' on line '.$trace[0]['line'];
}

Or, to catch exceptions and errors in one go (this is not backward compatible with PHP 5):

try{
     // Your code
} 
catch(Throwable $e) {
    $trace = $e->getTrace();
    echo $e->getMessage().' in '.$e->getFile().' on line '.$e->getLine().' called from '.$trace[0]['file'].' on line '.$trace[0]['line'];
}

if you have xdebug installed you can override every setting by setting:

xdebug.force_display_errors = 1;
xdebug.force_error_reporting = -1;

force_display_errors

Type: int, Default value: 0, Introduced in Xdebug >= 2.3 If this setting is set to 1 then errors will always be displayed, no matter what the setting of PHP's display_errors is.

force_error_reporting

Type: int, Default value: 0, Introduced in Xdebug >= 2.3 This setting is a bitmask, like error_reporting. This bitmask will be logically ORed with the bitmask represented by error_reporting to dermine which errors should be displayed. This setting can only be made in php.ini and allows you to force certain errors from being shown no matter what an application does with ini_set().





error-reporting