php linter built-in run

phpBuiltInLinter.php

<?php
declare(strict_types = 1);

if (! defined("APP_ROOT_DIR")) {
    define("APP_ROOT_DIR", realpath(__DIR__ . "/../"));
}

// https://www.imdb.com/title/tt2741602/
$blacklist = array(
    '/docroot/external_libs/',
    '/docroot/phpmyadmin/',
    '/vendor/',
    '/data/vitec/',
    '/docroot/js/highcharts/',
    '/hotpatch_backups/',
    '/.git/',
    '/tests/boilerplate.php',
    
);
$blacklist_regex = '\\(';
foreach ($blacklist as $blacklisted) {
    $blacklist_regex .= '.*' . $blacklisted . '.*\\|';
}
$blacklist_regex = substr($blacklist_regex, 0, - strlen('\\|'));
$blacklist_regex .= '\\)';

$extensions = array(
    "php"
);
$find_regex = ".*\\.\\(" . implode("\\|", $extensions) . "\\)";

// find -iname "*.php" -print0 | xargs -0 -n 1 -i sh -c "php -l {} || true" | grep -v -E '^No syntax errors detected in*'

// $cmd looks like:
// find '/home/hans/projects/app' -regex '.*\.\(php\)' -not -regex '\(.*/docroot/external_libs/.*\|.*/docroot/phpmyadmin/.*\|.*/vendor/.*\|.*/data/vitec/.*\|.*/docroot/js/highcharts/.*\|.*/hotpatch_backups/.*\|.*/.git/.*\)' -print0 2>/dev/null | xargs -0 -n 1 -I '{}' sh -c "V=\$(php -l \"{}\" || /bin/echo \"\n\n\" ); /bin/echo -e -n \"\033[2K\" && echo \$V && /bin/echo -e -n \"\033[1A\" || printf \n"

$cmd = implode(" ", array(
    'find',
    escapeshellarg(APP_ROOT_DIR),
    '-regex ' . escapeshellarg($find_regex),
    '-not -regex ' . escapeshellarg($blacklist_regex),
    '-print0',
    '2>/dev/null',
    '|',
    // i went a bit overboard here..
    // /bin/echo -e -n \"\\033[2K\" means "clear everything on the current line"
    // /bin/echo -e -n \"\\033[1A\" means "go up to the previous line, but only if php didn't find any errors on the last file"
    // the || printf \n makes sure sh always returns 0 to not terminate xargs (xargs terminate if the program returns nonzero)
    // the reason for all that stuff is to make kindof-cool-looking progress indication: all files are printed on a single line saying
    // "no errors found in this file", except those files with an actual error
    'xargs -0 -n 1 -I \'{}\' sh -c "V=\\$(php -l \"{}\" || /bin/echo \\"\n\n\\" );  /bin/echo -e -n \"\\033[2K\" && echo \\$V &&  /bin/echo -e -n \"\\033[1A\" || printf \\n"'
));
echo "executing:\n{$cmd}\nthis may take several minutes..\n\n";
$ret = null;
passthru($cmd, $ret);
echo "\n";
die($ret);