webfly.pl Design, development and SEO

Quick Guide conditional if

Author: admin | Monday, February 20, 2012, 21:05 hours | Read 25634 times

More than once I was looking on the internet write a summary of the conditionally if. It is often useful, especially when assigning a value to a variable. In this case it is a conditional assignment of values ​​for the variable.

There is not much to write, these things are best explained and illustrated with examples.

Standard Operational if:

PHP Code:

Mark

if ($ Condition) {
   / / Do the if $ condition is true
}
else {    
  / / Do the if $ condition is not satisfied
}

Slightly shorter version of the manual if:

PHP Code:

Mark

if ($ Condition) / / Do the if $ condition is true
else / / Do the if $ condition is not satisfied

very short version of the manual if:

PHP Code:

Mark

($ Condition) ? / * Do if $ condition is true * / :  / * Do if $ condition is not satisfied * /; 

What, in practice, for example, looked at me like this:

PHP Code:

Mark

$ Jezyk_strony = (!$ _GET['Jezyk_strony']) ? $ Cfg['Domyslny_jezyk_strony'] : $ _GET['Jezyk_strony'];

Comments:

1. On Monday, August 13, 2012, at 16:34 Young wrote / a:
   

   As a curiosity append the operator introduced in PHP Elvis and you can even shorten the record even more :) but showing an example:
   
   In PHP 5.2 and lower ...
   
   $ Jezyk_strony = ($ _GET ['jezyk_strony'])? $ _GET ['Jezyk_strony']: $ cfg ['domyslny_jezyk_strony'];
   
   In PHP 5.3:
   
   $ Jezyk_strony = ($ _GET ['jezyk_strony'])?: $ Cfg ['domyslny_jezyk_strony'];