Difference between revisions of "Sven/PHP"
From Organic Design wiki
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==Debugging PHP== | ==Debugging PHP== | ||
| − | In MediaWiki there is a profiler that can be set, see [[MW:How to debug]]. | + | {{Info:In MediaWiki there is a profiler that can be set, see [[MW:How to debug]].}} |
| − | Debuggers generally use a [[W:Stack trace]]. This can be approximated by using [http://www.php.net/print print] and [http://www.php.net/die die] statements in sections of code. | + | Debuggers generally use a [[W:Stack trace]]. This can be approximated by using [http://www.php.net/print print] and [http://www.php.net/die die] statements in sections of code. The combination of [http://www.php.net/print_r print_r] and [http://www.php.net/func_get_args func_get_args] allows you to return an array of args that a function was called with; |
| − | |||
| − | The combination of [http://www.php.net/print_r print_r] and [http://www.php.net/func_get_args func_get_args] allows you to return an array of args that a function was called with; | ||
[http://www.php.net/print_r print_r]([http://www.php.net/func_get_args func_get_args]()); | [http://www.php.net/print_r print_r]([http://www.php.net/func_get_args func_get_args]()); | ||
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class Person { | class Person { | ||
var $name = "Fred"; | var $name = "Fred"; | ||
| − | var $age = 35; | + | var $age = 35; |
} | } | ||
$o = new Person; | $o = new Person; | ||
| Line 22: | Line 20: | ||
;Array | ;Array | ||
;( | ;( | ||
| − | ; [name | + | ; [name] => Fred |
| − | ; [age] => 35 | + | ; [age] => 35 |
;) | ;) | ||
Revision as of 21:44, 8 December 2007
Debugging PHP
{{Info:In MediaWiki there is a profiler that can be set, see MW:How to debug.}}
Debuggers generally use a W:Stack trace. This can be approximated by using print and die statements in sections of code. The combination of print_r and func_get_args allows you to return an array of args that a function was called with;
print_r(func_get_args());
Casting an object of an array builds an array of the properties, mapping property names to values. e.g.
class Person {
var $name = "Fred";
var $age = 35;
}
$o = new Person;
$a = (array) $o
print_r($a);
outputs;
- Array
- (
- [name] => Fred
- [age] => 35
- )
PHP errors
To see PHP errors, add this to the very top of LocalSettings.php:
error_reporting(E_ALL);
ini_set("display_errors", 1);
