为什么回调函数在array_filter()里面没有起作用？
<br> <?php<br> function myFunction($v) <br> {<br> if ($v==="Dog")<br> {<br> return "Fido";<br> }<br> return $v;<br> }<br> $a=array("Horse","Dog","Cat");<br> //Array ( [0] => Horse [1] => Fido [2] => Cat ) <br> print_r(array_map("myFunction",$a)); <br> <br> //Array ( [0] => Horse [1] => Dog [2] => Cat )<br> //为什么回调函数在array_filter()里面没有起作用？<br> print_r(array_filter($a,"myFunction"));<br> ?><br> array_filter() 回调函数
