syntax question

[dumdumsareyum]

What does it all mean?  ???  I'm trying to let my search results be displayed on multiple pages. I have edited a program in the past that had this functionality so I'm using it as a guide, but I'm not sure how this line of code works:

  $prev_page = ($thispage-1 <= 0) ? 0 : $thispage-1; 

 

Would anyone mind explaining this syntax (I don't get what the ? and : are doing, I mean I get that it's trying to say that the previous page is equal to this page -1, unless it's less than or equal to zero, just not quite sure exactly how it's saying that....)? Thanks in advance!

[redarrow]

if ? <<<< : <<<< else

 

http://www.totallyphp.co.uk/tutorials/using_if_else_ternary_operators.htm

 

ternary operater

[MadTechie]

$prev_page = ($thispage-1 <= 0) ? 0 : $thispage-1; 

is basically a short if statment

its short for

if($thispage-1 <= 0)
{
$prev_page=0;
}else{
$prev_page=$thispage-1;
}

[ucffool]

It's called a ternary conditional.

 

expression ? ValueIfTRUE : ValueIfFALSE;

 

Evaluate expression, if it is true, the value after the ? and before the : is used. If it is false, the value after the : and before the ; is used.

It returns either the values defined (in your case, assigning them to $prev_page).

[dumdumsareyum]

Awesome. That helps a lot    I was getting nowhere searching the php manual for  "?" and ":" hehe. 

[MadTechie]

It's called a ternary conditional.

 

its "Ternary Operator" or "Conditional Operator"