Revert "Remove no longer used "log_errors_max_len" ini directive (#6838)"

This reverts commit d2d227e.

This is an ABI break.

Author: nikic

NEWS

@@ -8,8 +8,6 @@ PHP                                                                        NEWS
   . Fixed bug #67792 (HTTP Authorization schemes are treated as case-sensitive).
     (cmb)
   . Fixed bug #80972 (Memory exhaustion on invalid string offset). (girgias)
-  . Removed log_errors_max_len ini directive from default ini files, since it
-    no longer had any effect since PHP 8.0.0. (Michael Voříšek)
 
 - FTP:
   . Fixed bug #80901 (Info leak in ftp extension). (cmb)

UPGRADING

@@ -1124,10 +1124,6 @@ PHP 8.0 UPGRADE NOTES
   . New INI directive to choose the version of the .NET framework to use for
     dotnet objects.
 
-- log_errors_max_len
-  . INI directive for setting the maximum length of log_errors in bytes no
-    longer has any effect and has been removed.
-
 ========================================
 12. Windows Support
 ========================================

ext/ftp/tests/bug80901.phpt

@@ -4,6 +4,8 @@ Bug #80901 (Info leak in ftp extension)
 <?php
 require 'skipif.inc';
 ?>
+--INI--
+log_errors_max_len=0
 --FILE--
 <?php
 $bug80901 = true;

ext/oci8/tests/error3.phpt

@@ -10,6 +10,8 @@ if ($cv[0] < 11 || ($cv[0] == 11 && $cv[1] < 2) || ($cv[0] == 11 && $cv[1] == 2
     die("skip test works only with Oracle 11.2.0.3 or greater version of Oracle client libraries");
 }
 ?>
+--INI--
+log_errors_max_len=4096
 --FILE--
 <?php
 

ext/standard/tests/dir/bug80960.phpt

@@ -4,6 +4,8 @@ Fix #80960 (opendir() warning wrong info when failed on Windows)
 <?php
 if (PHP_OS_FAMILY !== "Windows") die("skip for Windows only");
 ?>
+--INI--
+log_errors_max_len=0
 --FILE--
 <?php
 opendir("notexist*");

ext/standard/tests/file/parse_ini_file_variation3.phpt

@@ -33,6 +33,7 @@ error_reporting  =  E_ALL
 display_errors = On
 display_startup_errors = Off
 log_errors = Off
+log_errors_max_len = 1024
 ignore_repeated_errors = Off
 ignore_repeated_source = Off
 report_memleaks = On
@@ -68,7 +69,7 @@ foreach($newdirs as $newdir) {
 --EXPECTF--
 *** Testing parse_ini_file() : variation ***
 New include path is : %sparse_ini_file_variation3.dir1%sparse_ini_file_variation3.dir2%sparse_ini_file_variation3.dir3%S
-array(9) {
+array(10) {
   ["error_reporting"]=>
   string(5) "32767"
   ["display_errors"]=>
@@ -77,6 +78,8 @@ array(9) {
   string(0) ""
   ["log_errors"]=>
   string(0) ""
+  ["log_errors_max_len"]=>
+  string(4) "1024"
   ["ignore_repeated_errors"]=>
   string(0) ""
   ["ignore_repeated_source"]=>

ext/standard/tests/strings/006.phpt

@@ -1,5 +1,7 @@
 --TEST--
 highlight_file() and output buffer
+--INI--
+log_errors_max_len=4096
 --FILE--
 <?php
 

ext/standard/tests/strings/007-win32.phpt

@@ -2,6 +2,8 @@
 php_strip_whitespace() and output buffer
 --SKIPIF--
 <?php if( substr(PHP_OS, 0, 3) != "WIN") die('skip Windows only test');?>
+--INI--
+log_errors_max_len=4096
 --FILE--
 <?php
 $file = str_repeat("A", PHP_MAXPATHLEN - strlen(__DIR__ . DIRECTORY_SEPARATOR . __FILE__));

ext/standard/tests/strings/007.phpt

@@ -2,6 +2,8 @@
 php_strip_whitespace() and output buffer
 --SKIPIF--
 <?php if( substr(PHP_OS, 0, 3) == "WIN") die('skip Non windows test');?>
+--INI--
+log_errors_max_len=4096
 --FILE--
 <?php
 $file = str_repeat("A", PHP_MAXPATHLEN - strlen(__DIR__ . DIRECTORY_SEPARATOR . __FILE__));

main/main.c

@@ -659,6 +659,7 @@ PHP_INI_BEGIN()
 	STD_PHP_INI_BOOLEAN("ignore_user_abort",	"0",		PHP_INI_ALL,		OnUpdateBool,			ignore_user_abort,		php_core_globals,	core_globals)
 	STD_PHP_INI_BOOLEAN("implicit_flush",		"0",		PHP_INI_ALL,		OnUpdateBool,			implicit_flush,			php_core_globals,	core_globals)
 	STD_PHP_INI_BOOLEAN("log_errors",			"0",		PHP_INI_ALL,		OnUpdateBool,			log_errors,				php_core_globals,	core_globals)
+	STD_PHP_INI_ENTRY("log_errors_max_len",	 "1024",		PHP_INI_ALL,		OnUpdateLong,			log_errors_max_len,		php_core_globals,	core_globals)
 	STD_PHP_INI_BOOLEAN("ignore_repeated_errors",	"0",	PHP_INI_ALL,		OnUpdateBool,			ignore_repeated_errors,	php_core_globals,	core_globals)
 	STD_PHP_INI_BOOLEAN("ignore_repeated_source",	"0",	PHP_INI_ALL,		OnUpdateBool,			ignore_repeated_source,	php_core_globals,	core_globals)
 	STD_PHP_INI_BOOLEAN("report_memleaks",		"1",		PHP_INI_ALL,		OnUpdateBool,			report_memleaks,		php_core_globals,	core_globals)

main/php_globals.h

@@ -68,6 +68,7 @@ struct _php_core_globals {
 	zend_uchar display_errors;
 	zend_bool display_startup_errors;
 	zend_bool log_errors;
+	zend_long      log_errors_max_len;
 	zend_bool ignore_repeated_errors;
 	zend_bool ignore_repeated_source;
 	zend_bool report_memleaks;

php.ini-development

@@ -519,6 +519,11 @@ display_startup_errors = On
 ; http://php.net/log-errors
 log_errors = On
 
+; Set maximum length of log_errors. In error_log information about the source is
+; added. The default is 1024 and 0 allows to not apply any maximum length at all.
+; http://php.net/log-errors-max-len
+log_errors_max_len = 1024
+
 ; Do not log repeated messages. Repeated errors must occur in same file on same
 ; line unless ignore_repeated_source is set true.
 ; http://php.net/ignore-repeated-errors

php.ini-production

@@ -521,6 +521,11 @@ display_startup_errors = Off
 ; http://php.net/log-errors
 log_errors = On
 
+; Set maximum length of log_errors. In error_log information about the source is
+; added. The default is 1024 and 0 allows to not apply any maximum length at all.
+; http://php.net/log-errors-max-len
+log_errors_max_len = 1024
+
 ; Do not log repeated messages. Repeated errors must occur in same file on same
 ; line unless ignore_repeated_source is set true.
 ; http://php.net/ignore-repeated-errors

run-tests.php

@@ -341,6 +341,7 @@ function main(): void
         'precision=14',
         'serialize_precision=-1',
         'memory_limit=128M',
+        'log_errors_max_len=0',
         'opcache.fast_shutdown=0',
         'opcache.file_update_protection=0',
         'opcache.revalidate_freq=0',