root/namespace-unused

#!/usr/bin/php
<?php
# remove unused use statements
if(!isset($_SERVER['argv'][1]) || in_array($_SERVER['argv'][1], array('--help', '-h', '-?'))) {
        help();
        exit;
}
$dir = $_SERVER['argv'][1];
$pattern = isset($_SERVER['argv'][2]) ? $_SERVER['argv'][2] : '/\.php$/';

$ite = new RecursiveDirectoryIterator($dir);
foreach (new RecursiveIteratorIterator($ite) as $filename => $cur) {
        if(preg_match($pattern, $filename)) {
                updateFile($filename);
        }
}

function updateFile($filename) {
        echo $filename;

        $block = file($filename);
        $regexp = $matches = array();
        foreach($block as $i => $line) {
                if(preg_match('/^use .*(?: |\\\)([a-zA-Z]+);$/', $line, $res)) {
                        $regexp[$i] = $res[1];
                        $matches[$res[1]] = array(
                                'line' => $i,
                                'hits' => 0
                        );
                }
        }
        
        // sort by length to avoid matching prefixes
        if($regexp) {
                $sortArray = $tmp = array();
                foreach($regexp as $idx => $obj) {
                        $sortArray[$idx] = strlen($obj);
                        $tmp[$idx."x"] = $obj;
                }

                $regexp = array();
                array_multisort($sortArray, SORT_DESC, $tmp);
                foreach($tmp as $idx => $obj) {
                        $regexp[substr($idx, 0, -1)] = $obj;
                }
        }
        
        $hit = false;
        if($matches) {
                $regexp = '/('.implode("|", $regexp).')/';
                preg_match_all($regexp, implode("", $block), $res);
                if($res) {
                        foreach($res[1] as $className) {
                                $matches[$className]['hits']++;
                        }
                }
                
                foreach($matches as $row) {
                        if($row['hits'] == 1) {
                                echo "\n\t- remove #".$row['line'].': '.$block[$row['line']];
                                unset($block[$row['line']]);
                                $hit = true;
                        }
                }
        }

        if($hit) {
                file_put_contents($filename, implode("", $block));
                echo "\tchanged\n";
        } else {
                echo "\tunchanged\n";
        }
}

function help() {
        echo "removes unused use clauses";
        echo "\n";
        echo "Usage: " . basename($_SERVER['argv'][0]) . " folder [--help]\n";
        echo "\n";
        echo "The options are as follows:\n";
        echo "  -?, --help\n";
        echo "    Show this help and exit.\n\n";
}