源代码:
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <FONT COLOR=#ff0000><?php function myfunction(&$value,$key) { $value="yellow"; } $a=array("a"=>"red","b"=>"green","c"=>"blue"); array_walk($a,"myfunction"); print_r($a); ?></FONT> </body> </html> </HTML>
运行结果：
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <FONT COLOR=#ff0000>Array ( [a] => yellow [b] => yellow [c] => yellow ) </FONT> </body> </html> </HTML>