[xdebug-general] Re: Code coverage of if statements

On Mon, 22 Dec 2008, Mike Richardson wrote:

> which seems wrong since line 6 is *not* executing (but line 5 is)? If I call
> f(1) instead I get lines 6, 12 and 13 executed, which is right; if I call
> f(0) and have braces on lines 5 and 7 then line 6 is not reported as
> executed. If this an Xdebug bug or a PHP limitation?

It's a PHP limitation. If you see what happens internally, you see that
it only "Generates" code for line 2, 6, 8 and 9:

filename: /tmp/vld.php
function name: f
number of ops: 9
compiled vars: !0 = $a
line # op fetch ext return
operands
-------------------------------------------------------------------------------
   2 0 EXT_NOP
         1 RECV 1
   6 2 EXT_STMT
         3 JMPZ !0, ->6
         4 RETURN 1
         5* JMP ->7
   8 6 RETURN 2
   9 7* EXT_STMT
         8* RETURN null

regards,
Derick

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