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Posted by Tyno Gendo on 05/02/07 08:36
Jerry Stuckle wrote:
> Tyno Gendo wrote:
>> I have just written a line of code like this (yes, many people think
>> this stinks bad):
>>
>> <?php true == isset($page_seq) ? echo "$page_seq" : false; ?>
>>
>> However it breaks with 'Unexpected T_ECHO'
>>
>> But
>>
>> <?php true == isset($page_seq) ? print "$page_seq" : false; ?>
>>
>> Works as expected.
>>
>> Anyone know why? Maybe its blindly obvious to someone, that time of
>> the day when the brain SLLLOOOOOOOWWS down.
>
> It fails because the ternary operator requires the true and false
> clauses to return values. echo does not return a value. print() does.
>
> It's basically the *very subtle* difference between the two.
>
Thanks Jerry, I did notice that in the manual.
Are there any other functions that return void? I tried the following
and they didn't product errors:
function test() {
// no return value, confirmed with echo test();
}
1 == 1 ? test() : false;
This worked fine but returns no return value.
And...
1 == 1 ? exit("yes, its was true") : false;
My function doesn't return anything and exit has a void return although
I can see exit might work as its a script terminator so perhaps the
tertiary doesn't care as the script is ending.
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