check which files/dirs are writeable, recursively

writeCheck.php

<?php
$out = [];
function readall($dir, &$out) {
    $try = explode("\n", `ls -1 $dir/`);
    $try = array_flip($try);
    foreach($try as $k => $v) {
        if(!$k || $k === '.' || $k === '..') {
            continue;
        }
        $k = "$dir/$k";
        if(is_dir($k)) {
            readall($k, $out);
            continue;
        }
        $fh = fopen($k, 'a');
        $out[$k] = ($fh) ? '1' : '0';
    }
};
readall('../app', $out);
print_r($out);
die;