将以下相应代码放到对应目录中的.htaccess文件，即可实现相应功能。

关闭错误显示：

php_flag display_startup_errors off
php_flag display_errors off
php_flag html_errors off
php_value docref_root 0
php_value docref_ext 0
只显示PHP错误：

php_flag display_errors on
php_flag display_startup_errors on
php_value error_reporting 2047
其中，“2047”为要显示的错误的级别，详细表格如下：

1 E_ERROR
2 E_WARNING
4 E_PARSE
8 E_NOTICE
16 E_CORE_ERROR
32 E_CORE_WARNING
64 E_COMPILE_ERROR
128 E_COMPILE_WARNING
256 E_USER_ERROR
512 E_USER_WARNING
1024 E_USER_NOTICE
2047 E_ALL
2048 E_STRICT
4096 E_RECOVERABLE_ERROR
要把错误保存到日志文件中，可以这样设置：

enable PHP error logging

php_flag log_errors on
php_value error_log /home/path/public_html/domain/PHP_errors.log
然后，可以设置不允许访问.log文件：

prevent access to PHP error log

Order allow,deny Deny from all Satisfy All
设置错误日志的最大体积，以bytes为单位：

general directive for

setting max error size
log_errors_max_len integer
综合上述，.htaccess的PHP错误显示设置汇总：

PHP error handling for production servers

disable display of startup errors

php_flag display_startup_errors off

disable display of all other errors

php_flag display_errors off

disable html markup of errors

php_flag html_errors off

enable logging of errors

php_flag log_errors on

disable ignoring of repeat errors

php_flag ignore_repeated_errors off

disable ignoring of unique source errors

php_flag ignore_repeated_source off

enable logging of php memory leaks

php_flag report_memleaks on

preserve most recent error via php_errormsg

php_flag track_errors on

disable formatting of error reference links

php_value docref_root 0

disable formatting of error reference links

php_value docref_ext 0

specify path to php error log

php_value error_log /home/path/public_html/domain/PHP_errors.log

specify recording of all php errors

php_value error_reporting 999999999

disable max error string length

php_value log_errors_max_len 0

protect error log by preventing public access

Order allow,deny Deny from all Satisfy All
以下则是适合开发者应用的设置：

PHP error handling for

development servers
php_flag display_startup_errors on
php_flag display_errors on
php_flag html_errors on
php_flag log_errors on
php_flag ignore_repeated_errors off
php_flag ignore_repeated_source off
php_flag report_memleaks on
php_flag track_errors on
php_value docref_root 0
php_value docref_ext 0
php_value error_log /home/path/public_html/domain/PHP_errors.log
php_value error_reporting 999999999
php_value log_errors_max_len 0

Order allow,deny Deny from all Satisfy All

总之，通过.htaccess设置显示PHP错误