May 11, 2021 PHP
1. PHP Error and Logging functions
2. Introduction to PHP Error and Logging
3. The configuration is performed
The Error and Logging functions are part of the PHP core and are not required to be installed.
The Error and Logging functions allow you to process and log errors.
The Error function allows the user to define error handling rules and modify how errors are logged.
The Logging function allows users to log applications and send log messages to e-mail messages, system logs, or other machines.
The error function is affected .ini php profile.
Error and log configuration options:
| Parameters | The default | Describe | The range can be modified |
|---|---|---|---|
| error_reporting | Null | Set the error level for PHP and return the current level (number or constant). | PHP_INI_ALL |
| display_errors | "1" |
This option sets whether the error message is displayed to the screen as part of the output, or is hidden from the user.
Note: This feature should not be used in an on-line production environment (used during development testing) |
PHP_INI_ALL |
| display_startup_errors | "0" | Even if display_errors is set to on, the error message during PHP startup is not displayed. It is highly recommended that you set the display_startup_errors to off, except for debugging purposes. | PHP_INI_ALL |
| log_errors | "0" | Set whether the error message that the script is running is logged in the server error log or error_log error log. Note that this is a specific configuration item related to the server. | PHP_INI_ALL |
| log_errors_max_len | "1024" | Sets the log_errors bytes of the value of the computer. I n error_log adds information about the source of the error. T he default is 1024, and if set to 0, it means unlimited length. This length setting has a restrictive effect on logged errors, $php, and the errormsg. | PHP_INI_ALL |
| ignore_repeated_errors | "0" | Duplicate information is not logged. Repeated errors must appear on the same line of code in the same file, unless the ignore_repeated_source set to true. | PHP_INI_ALL |
| ignore_repeated_source | "0" | When duplicate messages are ignored, the source of the message is also ignored. When this setting is turned on, duplicate information does not record whether it is generated by different files or different source code lines. | PHP_INI_ALL |
| report_memleaks | "1" | If this parameter is set to Off, the memory leak information is not displayed (in stdout or logs). | PHP_INI_ALL |
| track_errors | "0" | If turned on, the last error will always be in the $php the variable s errormsg. | PHP_INI_ALL |
| html_errors | "1" | Turn off the HTML tag in the error message. |
PHP_INI_ALL
PHP_INI_SYSTEM in PHP <= 4.2.3. |
| xmlrpc_errors | "0" | Turn off normal error reporting and format the error format to XML-RPC error messages. | PHP_INI_SYSTEM |
| xmlrpc_error_number | "0" | Used as the value of the XML-RPC faultCode element. | PHP_INI_ALL |
| docref_root | "" |
The new error message format contains a reference page that describes the error specifically or describes the function that caused it to occur.
In order to provide a page of the manual, you can download the manual for the corresponding language on the OFFICIAL PHP website and set the URL to the local address in the ini. If your local manual copy can be accessed using "/manual/" you can simply set docref_root /manual/. You'll also need docref_ext set the suffix name that matches your local docref_ext, .html. Of course, you can also set an external reference address. For example, you can set the docref_root-http://manual/en/or docref_root-"http://landonize.it/?how=url&theme=classic&filter=Landon" and url=http%3A%2F%2Fwww.php.net%2F" |
PHP_INI_ALL |
| docref_ext | "" | See docref_root. | PHP_INI_ALL |
| error_prepend_string | Null | The content that was output before the error message. | PHP_INI_ALL |
| error_append_string | Null | The contents of the output after the error message. | PHP_INI_ALL |
| error_log | Null | The file to which the setup script error will be logged. The file must be written by the web server user. | PHP_INI_ALL |
The Error and Logging functions are part of the PHP core. These functions can be used without installation.
PHP: Indicates the earliest version of PHP that supports the function.
| function | describe | PHP |
|---|---|---|
| debug_backtrace() | Generate Backtrace. | 4 |
| debug_print_backtrace() | Print backtrace. | 5 |
| error_get_last() | Get the last mistake. | 5 |
| error_log() | Send an error to the server error record, file, or remote target. | 4 |
| error_reporting() | It is specified which error is reported. | 4 |
| restore_error_handler() | Restore the previous error handler. | 4 |
| restore_exception_handler() | Restore the previous exception handler. | 5 |
| set_error_handler() | Set user-defined error handling functions. | 4 |
| set_exception_handler() | Set user-defined exception handlers. | 5 |
| trigger_error() | Create user-defined error messages. | 4 |
| user_error() | The alias of Trigger_Error (). | 4 |
PHP: Indicates the earliest version of PHP that supports this constant.
| value | constant | describe | PHP |
|---|---|---|---|
| 1 | E_ERROR | Fatal errors at runtime.The error that cannot be repaired.Stop execution scripts. | |
| 2 | E_WARNING | Running a non-fatal error.No script is not stopped. | |
| 4 | E_PARSE | Analytical errors when compiling.Analysis errors should be generated only by the parser. | |
| 8 | E_NOTICE | Notice of runtime.Script discovery may be an error, but it is also possible to happen when you run the script. | |
| 16 | E_CORE_ERROR | Fatal errors in PHP startup.This is like the PHP core E_ERROR. | 4 |
| 32 | E_CORE_WARNING | PHP is a non-fatal error at startup.This is like the PHP core E_WARNING. | 4 |
| 64 | E_COMPILE_ERROR | Fatal errors when compiling.This is like e_ERROR generated by the Zend script engine. | 4 |
| 128 | E_COMPILE_WARNING | Compile time with non-fatal errors.This is like E_WARNING generated by the Zend scripting engine. | 4 |
| 256 | E_USER_ERROR | The fatal error generated by the user.This is like the E_ERROR generated by the programmer using the PHP function trigger_error (). | 4 |
| 512 | E_USER_WARNING | User-generated non-fatal errors.This is like the E_WARNING generated by the programmer using the PHP function trigger_error (). | 4 |
| 1024 | E_USER_NOTICE | The notification of the user generated.This is like the E_NOTICE generated by the programmer using the PHP function Trigger_Error (). | 4 |
| 2048 | E_STRICT | Notice of runtime.PHP recommends that you change the code to increase the interoperability and compatibility of the code. | 5 |
| 4096 | E_RECOVERABLE_ERROR | Captuable fatal mistakes.This is like an e_ERROR that can be captured by the user-defined handle (see set_error_handler ()). | 5 |
| 6143 | E_ALL | All errors and warning levels, except E_STRICT (from PHP 6.0, E_STRICT will be part of E_ALL). | 5 |
Next, this site will take you through the Filesystem function!