array_filter() 回调函数
<?php function myFunction($v) { if ($v==="Dog") { return "Fido"; } return $v; } $a=array("Horse","Dog","Cat"); //Array ( [0] => Horse [1] => Fido [2] => Cat ) print_r(array_map("myFunction",$a)); //Array ( [0] => Horse [1] => Dog [2] => Cat ) //为什么回调函数在array_filter()里面没有起作用？ print_r(array_filter($a,"myFunction")); ?>去看下array_filter 的用法就会明白
function myFunction($v) { if ($v==="Dog") { return true; } return false; } $a=array("Horse","Dog","Cat"); //Array ( [0] => Horse [1] => Fido [2] => Cat ) print_r(array_map("myFunction",$a)); //Array ( [0] => Horse [1] => Dog [2] => Cat ) //为什么回调函数在array_filter()里面没有起作用？ print_r(array_filter($a,"myFunction"));明白了，谢谢两位
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