minWindow.php

<?php

    $hay = 'aabdf';
    $nee = 'aaf';
    $lenHay = strlen($hay);
    $lenNee = strlen($nee);
    $arrNee = str_split($nee);

    
    for($i = $lenNee; $i <= $lenHay; $i++){
        for($j = 0; $j <= $lenHay - $i;$j++) {
            # echo "$i - $j"."\n";
            $cropHay = substr($hay,$j,$i);
            $arrHay = str_split($cropHay);
            echo "--arrNee--";
            print_r($arrNee);
            echo "--arr inc--";
            print_r(array_intersect($arrHay, $arrNee));
            if( array_intersect($arrHay, $arrNee) == $arrNee ) { print_r( $arrHay ) ;}
        }
        echo 'not found';
    }

minWindowSubString.php

<?php
    $hay = 'aabdf';
    $nee = 'aaf';
    $lenHay = strlen($hay);
    $lenNee = strlen($nee);
    $arrNee = str_split($nee);
    
    for($i = $lenNee; $i <= $lenHay; $i++){
        for($j = 0; $j <= $lenHay - $i;$j++) {
            # echo "$i - $j"."\n";
            $cropHay = substr($hay,$j,$i);
            $arrHay = str_split($cropHay);

            if( array_filter(array_values(array_intersect($arrHay, $arrNee))) == $arrNee ) { echo 'paisi' ;}
        }
        echo 'not found';
    }