Re: array filtering question

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Message-ID	<1718282.RzYSdqBbuY@PointedEars.de> (permalink)
From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To	Thomas 'PointedEars' Lahn <php@PointedEars.de>
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Date	Mon, 21 May 2012 19:26:11 +0200
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Subject	Re: array filtering question
Newsgroups	comp.lang.php
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Shake wrote:

> El 21/05/2012 16:22, bill escribió:
>> I have a POST array with about 200 elements.
>> There MAY be one or more key elements that start with deleteF~
>> (for example deleteF~EAP, deleteF~Lowfee)
>>
>> What I want to know is if any array element begins with deleteF~
> 
> Perhaps you can use multidimensional array here.
> 
> If you have something like:
> 
> <input type="checkbox" name="item_1" value="x" />
> <input type="checkbox" name="[deleteF~][item_2]" value="x" />
> <input type="checkbox" name="item_3" value="x" />
> <input type="checkbox" name="[deleteF~][item_4]" value="x" />
> 
> Perhaps if better to change to:
> 
> Then the POST will be:
> 
> $_POST['item_1] = 'X';
> $_POST['item_3] = 'X';
> $_POST['deleteF~']['item_2] = 'X';
> $_POST['deleteF~']['item_4] = 'X';
> 
> And you can do:
> 
> if(isset($_POST['deleteF~'])) foreach($_POST['deleteF~'] as $Item) {
> 
> // Do things with this item.
> }

However, if for some reason the markup cannot be changed, the solution still 
is rather simple:

  $matching_keys = array_filter(array_keys($_POST),
    function ($key) {
      return preg_match('/^deleteF~/', $key);
    });

  if ($matching_keys)
  {
    /* … */
  }

<http://php.net/array_keys>
<http://php.net/preg_match>
<http://php.net/array_filter>


PointedEars
-- 
var bugRiddenCrashPronePieceOfJunk = (
    navigator.userAgent.indexOf('MSIE 5') != -1
    && navigator.userAgent.indexOf('Mac') != -1
)  // Plone, register_function.js:16

Thread

array filtering question bill <nobody@spamcop.net> - 2012-05-21 10:22 -0400
  Re: array filtering question Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-21 10:46 -0400
    Re: array filtering question bill <nobody@spamcop.net> - 2012-05-21 11:18 -0400
      Re: array filtering question Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-21 12:42 -0400
        Re: array filtering question bill <nobody@spamcop.net> - 2012-05-21 15:13 -0400
  Re: array filtering question Shake <QUITAESTO@QUITAESTO.NOES> - 2012-05-21 17:01 +0200
    Re: array filtering question bill <nobody@spamcop.net> - 2012-05-21 11:20 -0400
    Re: array filtering question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-05-21 19:26 +0200
      Re: array filtering question bill <nobody@spamcop.net> - 2012-05-21 15:19 -0400

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