thinkphp5, and the second parameter is wrong. Ask the god how to modify it. Thank you
<?php
namespace app\controller;
class Abs
{
public function index(){
function abc($value){
if($value!==""){
return true;
}else{
return false;
}
}
$data = [
"a"=>1,
"b"=>0,
"c"=>true,
"d"=>false,
"e"=>0,
"f"=>"",
"d"=>null
];
return array_filter($data,"abc");
}
} error report:
array_filter () expects parameter 2 to be a valid callback, function "abc" not found or invalid function name