How to change the way PHP writes errors in the error log file? -

i have been working on website on year now, , anxious put out there people use. has gotten quite large - want out of control - , on top of self taught amateur programmer.

so want sure, errors php produces logged in file, can access file , track errors down.

currently settings following:

<?php error_reporting(e_all); ini_set('display_errors', '0'); ini_set('log_errors', 1); ini_set('error_log', 'errors.log'); ?> 

works pretty far, error.log file contain stuff this:

[14-may-2013 00:16:26] php notice: undefined variable: nonexistentvariable in /home/www/dir/index.php on line 14[14-may-2013 00:16:28] php notice: undefined variable: nonexistentvariable in /home/www/dir/index.php on line 14

great, errors logged.

but have problem:

1. they in 1 line, no breaks. makes hard read. how each error in new line?

2. i see there timestamp. awesome! how can add things user's ip address, or other custom things?

again, questions:

how change way php writes errors in error log file? in particular, how can make new line after each error logged, error.log file easier read. , how add custom data , values such ip addresses?

answer: ended doing following - seems reproduce php doing standard , can there modified.

<?php function my_error_handler($type, $message, $file, $line, $vars) {     switch($type)      {          case 1: // 1 //              $type_str = 'error';              break;         case 2: // 2 //              $type_str = 'warning';             break;         case 4: // 4 //              $type_str = 'parse';             break;         case 8: // 8 //              $type_str = 'notice';              break;         case 16: // 16 //              $type_str = 'core_error';              break;         case 32: // 32 //              $type_str = 'core_warning';              break;         case 64: // 64 //              $type_str = 'compile_error';              break;         case 128: // 128 //              $type_str = 'compile_warning';              break;         case 256: // 256 //              $type_str = 'user_error';              break;         case 512: // 512 //              $type_str = 'user_warning';              break;         case 1024: // 1024 //              $type_str = 'user_notice';              break;         case 2048: // 2048 //              $type_str = 'strict';              break;         case 4096: // 4096 //              $type_str = 'recoverable_error';              break;         case 8192: // 8192 //              $type_str = 'deprecated';              break;         case 16384: // 16384 //              $type_str = 'user_deprecated';              break;     }       $errormessage =  '[ '.date(r).' ] '.$type_str.': '.$message.' in '.$file.' on line '.$line."\n";    // development echo $errormessage;          $file = 'my_errors.log';         file_put_contents($file, $errormessage, file_append); }  error_reporting(e_all); ini_set('display_errors', '0'); set_error_handler('my_error_handler');  ?> 

you can't additional customization or implement of logic built-in error handler, you'd need set own error handler set_error_handler().

this function takes callback invoked when php encounters error, , can act accordingly.

see example on docs how use function , how implement proper callback.