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Re: On the usage of "@" (error control operator)

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El 23/05/2012 15:17, Leonardo Azpurua escribió:
> Hi,
>
> A few weeks ago, I wrote this sentence:
>
>     @$retVal = $this->lastfetch[$ndx];
>
> Yesterday, browsing the manual, I found this paragraph:
>
> "PHP supports one error control operator: the at sign (@). _When prepended
> to an expression_ in PHP, any error messages that might be generated by that
> expression will be ignored."
>
> and, a few lines further:
>
> "A simple rule of thumb is: if you can take the value of something, you can
> prepend the @ operator to it."
>
> Since an assigment is not an expression, the required syntax should be:
>
>     $retVal = @$this->lastfetch[$ndx];
>
> But both forms work.
>
>
> Is there any reason to prefer one above the other?
>

Both forms works, but not both forms are the same:


$retVal = @$this->lastfetch[$ndx];
           (....errors ignored....)

@$retVal = $this->lastfetch[$ndx];
(.........Errors ignored.........)


Perhaps in some cases "$retVal" could throw a type casting error or 
something of this kind.

Rgds.

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Thread

On the usage of "@" (error control operator) "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-23 08:47 -0430
  Re: On the usage of "@" (error control operator) Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-23 09:50 -0400
    Re: On the usage of "@" (error control operator) "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-23 10:19 -0430
      Re: On the usage of "@" (error control operator) Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-23 12:12 -0400
        Re: On the usage of "@" (error control operator) "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-23 14:15 -0430
          Re: On the usage of "@" (error control operator) Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-23 16:14 -0400
  Re: On the usage of "@" (error control operator) Shake <QUITAESTO@QUITAESTO.NOES> - 2012-05-23 16:12 +0200
    Re: On the usage of "@" (error control operator) "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-23 10:22 -0430
      Re: On the usage of "@" (error control operator) Shake <QUITAESTO@QUITAESTO.NOES> - 2012-05-23 17:11 +0200
        Re: On the usage of "@" (error control operator) "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-23 10:44 -0430
    Re: On the usage of "@" (error control operator) Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-23 12:13 -0400
  Re: On the usage of "@" (error control operator) Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-05-24 22:26 +0200

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