Reg: multiple callback not working in array map

Question

so many ways, we can achieve below expected output, but here intention is, how to use multiple callback in array map and achieve the below expected output.

How to add multiple callback in array_map

<?php
$scandir = scandir('.');
echo "<pre>";
print_r($scandir);
$scandir = array_map('array_filter',array_map('callback',$scandir));
print_r($scandir);

function callback(&$var){
    $curtime  = time();
    $filetime = filemtime($var);
    $diff = $curtime - $filetime;
    if ($diff < 2000){
        return $var;
    }
}
?>

Actual Output

Array
(
    [0] => .
    [1] => ..
    [2] => array.php
    [3] => array.php.bak
    [4] => code-test.php
    [5] => code-test.txt
    [6] => code-test.txt.bak
    [7] => code-test2.php
    [8] => load-file.csv
    [9] => load-file2.csv
)
Array
(
    [0] => 
    [1] => 
    [2] => 
    [3] => 
    [4] => 
    [5] => 
    [6] => 
    [7] => 
    [8] => 
    [9] => 
)

Expected Output

Array
(
    [2] => array.php
    [3] => array.php.bak
)

l'L'l · Accepted Answer · 2015-10-31 14:25:39Z

1

It's a bit unclear what you are actually wanting to do, although if the intention is to check for files or directories that have been modified within a certain range from now then making a few adjustments to your code should be adequate:

function callback(&$var) {
    $curtime  = time();
    $filetime = filemtime($var);
    $diff = $curtime - $filetime;
    if ($diff < 2000) {
        return $var;
    }
};

$scandir = scandir('.');
$scandir = array_filter(array_map("callback", $scandir));
print_r($scandir);

Some of the code you have might not be necessary, although I unfortunately can't check it atm.

answered Oct 31, 2015 at 14:25

l'L'l

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3 Comments

Bharanikumar Over a year ago

intention is, need to work with array map with multiple calllback

l'L'l Over a year ago

You should show your full code since you're only showing one callback.

l'L'l Over a year ago

@Bharanikumar: Can you edit your question to explain what the exact reason you want to use multiple callbacks is though; I think that would be helpful, even for people that might be able to guess.

DrKey · Accepted Answer · 2015-10-31 14:21:33Z

1

I think the problem is when you call

$scandir = array_map('array_filter',array_map('callback',$scandir));

because you can achieve that by using array_filter function.

The following should works

<?php
$scandir = scandir('.');
echo "<pre>";
print_r($scandir);
$scandir = array_filter($scandir,'callback');
print_r($scandir);

function callback(&$var){
    $curtime  = time();
    $filetime = filemtime($var);
    $diff = $curtime - $filetime;
    if ($diff < 2000 && $var != '.'){
        return $var;
    }
}
?>

answered Oct 31, 2015 at 14:21

DrKey

3,5352 gold badges34 silver badges47 bronze badges

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