<?php function myfunction($v) { if ($v==="Dog") { return "Fido"; } return $v; } $a=array("Horse","Dog","Cat"); print_r(array_map("myfunction",$a)); ?>
输出：
Array ( [0] => Horse [1] => Fido [2] => Cat )
<?php function myfunction($v1,$v2) { if ($v1===$v2) { return "same"; } return "different"; } $a1=array("Horse","Dog","Cat"); $a2=array("Cow","Dog","Rat"); print_r(array_map("myfunction",$a1,$a2)); ?>
输出：
Array ( [0] => different [1] => same [2] => different )
请看当自定义函数名设置为 null 时的情况：
<?php $a1=array("Dog","Cat"); $a2=array("Puppy","Kitten"); print_r(array_map(null,$a1,$a2)); ?>
输出：
Array ( [0] => Array ( [0] => Dog [1] => Puppy ) [1] => Array ( [0] => Cat [1] => Kitten ) )
原文：http://www.cnblogs.com/dangkei/p/3953622.html