v5:userguide:error_handling
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
userguide:error_handling [2015/10/16 20:39] – mnewnham | v5:userguide:error_handling [2018/06/27 16:18] (current) – function names starting with lowercase (#430) dregad | ||
---|---|---|---|
Line 1: | Line 1: | ||
====== Error Handling | ====== Error Handling | ||
+ | |||
===== Default Behaviour ===== | ===== Default Behaviour ===== | ||
- | By default errors in the execution of SQL statements are handled by the database driver that is being accessed by PHP. No errors are normally handled and it is necessary to query the last error code to see if there has been an error. | + | By default, errors in the execution of SQL statements are handled by the database driver that is being accessed by PHP. No errors are normally handled and it is necessary to query the last error code to see if there has been an error. This is done by use of the ' |
- | ===== adodb-errorhandler | + | ===== PHP set_error_handler |
- | * | + | Once the PHP set_error_handler is used to override the default |
- | * | + | |
- | ==== Standard Version ==== | + | --------------------------------------------------- |
- | ==== Customization | + | <WRAP right box round> |
- | ADOdb supports PHP5 exceptions. Just include _adodb-exceptions.inc.php_ and you can now catch exceptions | + | == See Also == |
+ | [[v5: | ||
+ | </ | ||
+ | ===== adodb-errorhandler.inc.php ===== | ||
+ | This file is designed to be copied off and customized for your own use. In it's simplest form, it can be used to emulate the ' | ||
<code php> | <code php> | ||
+ | include ' | ||
+ | include ' | ||
+ | |||
+ | $db = newAdoConnection(' | ||
+ | $db-> | ||
+ | |||
/* | /* | ||
- | * Connection to database assumed | + | * Invalid SQL statement will be trapped inside the custom errorhandling file |
- | */ | + | */ |
- | include(" | + | $result |
- | try { | + | |
- | | + | |
- | } catch (exception | + | |
- | var_dump($e); | + | |
- | adodb_backtrace($e->gettrace()); | + | |
- | } | + | |
</ | </ | ||
+ | ===== error_reporting ===== | ||
+ | The ADOdb error handler is not dependent on [[http:// | ||
- | ADOdb also provides two custom handlers which you can modify for your needs. The first one is in the **adodb-errorhandler.inc.php** file. This makes use of the standard PHP functions [[http:// | + | < |
+ | function ADODB_Error_Handler($dbms, | ||
+ | { | ||
+ | |||
+ | /* | ||
+ | * Remark out this line to trap errors when error_reporting = 0 | ||
+ | | ||
+ | if (error_reporting() == 0) | ||
+ | return; | ||
+ | |||
+ | </code> | ||
- | Including the above file will cause _trigger_error($errorstring, | ||
- | (a) Connect() or PConnect() fails, or | ||
- | (b) a function that executes SQL statements such as Execute() or SelectLimit() has an error. | ||
- | (c) GenID() appears to go into an infinite loop. | ||
- | The $errorstring is generated by ADOdb and will contain useful debugging information similar | + | ===== Override Error Trap/Resume ===== |
+ | In certain circumstances, | ||
- | If you define error_reporting(0), | + | <code php> |
+ | /** | ||
+ | * Traps errors | ||
+ | | ||
+ | function ignoreErrorHandler() | ||
+ | { | ||
+ | return true; | ||
+ | } | ||
+ | /* | ||
+ | * In Oracle we have no 'if index exists' | ||
+ | * so if the index did not exist in the first place, it would throw an error | ||
+ | * We want the error ignored, and for the program to continue as normal | ||
+ | */ | ||
+ | |||
+ | $saveErrorFn = $db-> | ||
+ | $db-> | ||
+ | set_error_handler(' | ||
+ | |||
+ | $db-> | ||
+ | |||
+ | /* | ||
+ | * Set the error handling back | ||
+ | */ | ||
+ | restore_error_handler(); | ||
+ | $db-> | ||
+ | |||
+ | </ | ||
+ | |||
+ | ===== Using A Class Method ===== | ||
<code php> | <code php> | ||
- | error_reporting(E_ALL); # pass any error messages triggered to error handler | + | class c |
+ | { | ||
+ | function e() | ||
+ | { | ||
+ | print "ERROR TRAP"; | ||
+ | } | ||
+ | } | ||
- | include(' | + | $c = new c; |
- | include(' | + | |
- | include(' | + | |
- | $c = NewADOConnection(' | + | $db-> |
- | $c-> | + | |
- | $rs=$c-> | + | |
- | if ($rs) | + | |
- | rs2html($rs); | + | |
</ | </ | ||
+ | ===== Combining With Custom Error Handling ===== | ||
+ | If you use '' | ||
+ | |||
+ | <code php> | ||
+ | error_reporting(E_ALL); | ||
+ | |||
+ | function myErrorHandler($p1, | ||
+ | { | ||
+ | /* | ||
+ | * Do some non-adodb handling | ||
+ | */ | ||
+ | return true; | ||
+ | } | ||
+ | |||
+ | set_error_handler(' | ||
+ | |||
+ | include ' | ||
+ | include ' | ||
+ | </ | ||
+ | |||
+ | |||
+ | |||
+ | ===== Exception Trapping ===== | ||
+ | ADOdb supports exception trapping using the '' | ||
+ | |||
+ | <code php> | ||
+ | |||
+ | include ' | ||
+ | include ' | ||
+ | |||
+ | try | ||
+ | { | ||
+ | $db = newADOConnection(" | ||
+ | |||
+ | } | ||
+ | catch (exception $e) | ||
+ | { | ||
+ | var_dump($e); | ||
+ | adodb_backtrace($e-> | ||
+ | } | ||
+ | |||
+ | </ | ||
+ | |||
+ | |||
+ | ===== Logging Error Messages ===== | ||
+ | If you want to log the error message, you can do so by defining the following optional constants: | ||
+ | * ADODB_ERROR_LOG_TYPE | ||
+ | * ADODB_ERROR_LOG_DEST | ||
- | If you want to log the error message, you can do so by defining the following optional constants ADODB_ERROR_LOG_TYPE and ADODB_ERROR_LOG_DEST. | + | ADODB_ERROR_LOG_TYPE is the error log message type (see [[http:// |
<code php> | <code php> | ||
Line 66: | Line 155: | ||
- | $c = NewADOConnection(' | + | $c = newADOConnection(' |
- | $c->PConnect(' | + | $c->pConnect(' |
- | $rs=$c->Execute(' | + | $rs=$c->execute(' |
if ($rs) | if ($rs) | ||
Line 78: | Line 167: | ||
The following message will be logged in the error.log file: | The following message will be logged in the error.log file: | ||
- | 2001-10-28 14:20:38 mysql error: [1146: Table ' | + | 2001-10-28 14:20:38 mysql error: [1146: Table ' |
+ | | ||
===== PEAR_ERROR ===== | ===== PEAR_ERROR ===== | ||
Line 90: | Line 180: | ||
include(' | include(' | ||
- | $c = NewADOConnection(' | + | $c = newADOConnection(' |
- | $c->PConnect(' | + | $c->pConnect(' |
- | $rs=$c->Execute(' | + | $rs=$c->execute(' |
if ($rs) | if ($rs) | ||
Line 118: | Line 208: | ||
===== MetaError and MetaErrMsg ===== | ===== MetaError and MetaErrMsg ===== | ||
- | If you need error messages that work across multiple databases, then use [[reference: | + | If you need error messages that work across multiple databases, then use [[v5:reference:connection: |
===== Error Messages ===== | ===== Error Messages ===== | ||
- | Error messages are outputted using the static method ADOConnnection:: | + | Error messages are outputted using the static method |
+ | |||
+ | | ||
+ | |||
+ | By default, it sends the messages to the standard output. You can override this to perform error logging. |
v5/userguide/error_handling.1445020780.txt.gz · Last modified: 2017/04/21 11:39 (external edit)