PHP/Language Basics/static variables

A static variable remembering its last value

   <source lang="html4strict">

<?php function birthday( ){

   static $age = 0;
   $age = $age + 1;
   echo "Birthday number $age
";

} $age = 30; birthday( ); birthday( ); echo "Age: $age
"; ?>

 </source>
   
  

static variables

   <source lang="html4strict">

<?php function keep_track() {

  STATIC $count  = 0;
  $count++;
  print $count;
  print "
";

} keep_track(); keep_track(); keep_track(); ?>

 </source>
   
  

Using the static modifier to change a member or method so it is accessible without instantiating the class

   <source lang="html4strict">

<?php class myclass {

   const MYCONST = 123; 
   
   static $value = 567; 

} echo "myclass::MYCONST = " . myclass::MYCONST . "\n"; echo "myclass::$value = " . myclass::$value . "\n"; ?>

 </source>
   
  

Working with Static Variables in Functions

   <source lang="html4strict">

<?php

   function statictest() {
       static $count = 0;
       $count++;
       return $count;
   }
   statictest();
   statictest();
   $foo = statictest();
   echo "The statictest() function ran $foo times.
";

?>

 </source>