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 />
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