| Re: Simple expression parser for PHP. [message #179754 is a reply to message #179744] |
Mon, 03 December 2012 17:28   |
Daniel Pitts
Messages: 68
Registered: May 2012
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On 12/2/12 3:45 AM, Thomas 'PointedEars' Lahn wrote:
> Daniel Pitts wrote:
>
>> On 12/1/12 9:58 AM, Thomas 'PointedEars' Lahn wrote:
>>> Daniel Pitts wrote:
>>>> I have a requirement that I need to take an expression and evaluate it.
>>>>
>>>> I'd very much like to avoid using PHP's eval(), for obvious reasons.
>>>> I'm kind of looking for something that is similar to OGNL (a Java
>>>> library for expressions).
>>>>
>>>> Speed is a plus, ease of integration is a nice-to-have. Low bug density
>>>> and active community is also a plus.
>>>
>>> What kind of expression are you talking about?
>>
>> Things along the lines of "request['some_attribute']" or "3 * someValue"
>> etc... Where I can specify the objects available to act upon ('request'
>> in the first example, 'someValue' in the second).
>>
>> Some method of traversing object graphs would be useful as well. Like I
>> said, something similar to OGNL, but for PHP instead.
>
> What do you need this for?
A program I'm writing. What's it to you? I've given the specific
requirements. ;-)
More specifically, it is to ease configuration of my program. The
expressions are going to be embedded into a DSL (domain-specific
language) for declaring a part of the business logic.
I'm trying to avoid using "eval" or forcing someone to write a PHP
function and reference that function by name. Most of the time, the
expressions are so simple, and only make sense in the context they
appear in the DSL.
Thanks,
Daniel.
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