PHP static keyword static variable practical method (1/3)-PHP source code

Ec (2); & nbsp; copy the following code & lt ;? PhpclassFoo {publicstatic $ my_staticfoo; publicfunctionstaticValue () {returnself: $ my_static ;}} classBarextendsFoo {publ script ec (2); script

The Code is as follows:

Class Foo { Public static $ my_static = 'foo '; Public function staticValue (){ Return self: $ my_static; } } Class Bar extends Foo { Public function fooStatic (){ Return parent: $ my_static; } } Print Foo: $ my_static .""; $ Foo = new Foo (); Print $ foo-> staticValue ().""; Print $ foo-> my_static. ""; // Undefined "Property" my_static Print $ foo: $ my_static .""; $ Classname = 'foo '; Print $ classname: $ my_static. "; // can be called dynamically after PHP 5.3.0 Print Bar: $ my_static .""; $ Bar = new Bar (); Print $ bar-> fooStatic ().""; ?>

Homepage 1 2 3 last