How to log errors into file in php?

Question

I started the beginner with php. I need to get errors that append in my website I use below code for log errors into file but do not work. This has no any error.

<!DOCTYPE html>
<html>
<body>

<?php
ini_set('display_startup_errors',1);
ini_set('display_errors',1);
error_reporting(E_ALL);

echo "My first PHP script!";
error_log( "Hello, errors!" );

?>
</body>
</html>

What is problem?

what do you mean by "This has no any error." ? Where you expect it to be? — ArtOsi
– ArtOsi, Commented Sep 29, 2017 at 7:10
when reload page display on page My first PHP script! . with out any error — hmahdavi
– hmahdavi, Commented Sep 29, 2017 at 7:19
because there is no errors in this script. From docs, by default error_log() "sent to PHP's system logger, using the Operating System's system logging mechanism or a file, depending on what the error_log configuration directive is set to" — ArtOsi
– ArtOsi, Commented Sep 29, 2017 at 7:23

Rotimi · Accepted Answer · 2017-09-29 07:28:44Z

1

In the above code, you need to also instruct php to log errors. Add the following directive

$path =$_SERVER['DOCUMENT_ROOT'].'/path/file.txt';//tell php where to save your error logs

ini_set('log_errors',1);//logs errors 

ini_set('error_log',$path); //override php's default error log directory

answered Sep 29, 2017 at 7:28

Rotimi

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5 Comments

hmahdavi Over a year ago

I change my code such as this but do not write error into file <?php $path =$_SERVER['DOCUMENT_ROOT'].'/log.txt'; ini_set('display_errors',1); ini_set('log_errors',1); ini_set('error_log',$path); error_reporting(E_ALL); require('dd.ir'); ?>

Rotimi Over a year ago

Does the path variable exist??

ArtOsi Over a year ago

@programmer138200 to display errors ini_set('display_startup_errors',1); ini_set('display_errors',1); error_reporting(E_ALL); is enough. You just don't see any errors because there is no such in your script. error_log() doesn't create an error, it just logs it.

Rotimi Over a year ago

The error log name is kinda confusing you. All it does is to log the string parameter to a file. Not specifically an error

ArtOsi Over a year ago

@programmer138200 if you want to log errors into file with error_log() set second param "message_type" to 3 and third param file where you would like to write error_log("Error message", 3, 'my_errors.log');

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