filter_var php

FILTER_CALLBACK

function myfilter($val)
{
    if(in_array($val, ['one','two','three'])){
        return false;
    }else
    return $val;
}
function test($str)
{
    $opti
    $rs=filter_var($str,FILTER_CALLBACK,$options);
    var_dump($rs);
    echo '<br>';
}
test('one');
test('aaa');
test(['bbb','two','123']);

Results:

bool(false) 
string(3) "aaa" 
array(3) { [0]=> string(3) "bbb" [1]=> bool(false) [2]=> string(3) "123" } 

FILTER_VALIDATE_INT

function test($num)
{
    $opti
    $rs=filter_var($num,FILTER_VALIDATE_INT,$options);
    var_dump($rs);
    echo '<br>';
}
test(99);
test(120);
test(250);

Results:

int(130) 
int(120) 
int(130) 

The above introduces filter_var php, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.