php syntax checker before commiting to git

git-lint.php

#!/usr/bin/env php
<?php
exec ('git diff --cached --name-status --diff-filter=ACM', $files);

// remove the character before the fileName
$files = array_map(function($x) {return trim(substr($x, 1)); }, $files);

// we only want the php files
$phps = array_filter($files, function($x) {return "php" == pathinfo($x, PATHINFO_EXTENSION);});

foreach ($phps as $file) {
    $lint = [];
    exec("php -l " . escapeshellarg($file), $lint, $return);

    if (!$return) { continue; }
    echo implode("\n", $lint), "\n";
    exit(1);
}

exit(0);

• Save this in your local repository as .git/hooks/pre-commit
• run chmod +x .git/hooks/pre-commit