PHP Windows opcache-xdebug crash

restart.php

<?php

if (!getenv('RESTART_TEST')) {
    showExtensionInfo();

    putenv('RESTART_TEST=1');
    putenv('PHP_INI_SCAN_DIR=');

    $iniFiles = getIniFiles();
    $tmpIni = writeTmpIni($iniFiles);

    $args = array_merge([PHP_BINARY, '-c', $tmpIni], $_SERVER['argv']);
    $command = implode(' ', array_map('escapeshellarg', $args));
    passthru($command);

} else {
    echo 'Process restarted', PHP_EOL;
    showExtensionInfo();
}

function getIniFiles()
{
    $iniFiles = [strval(php_ini_loaded_file())];

    if ($scanned = php_ini_scanned_files()) {
        $iniFiles = array_merge($iniFiles, array_map('trim', explode(',', $scanned)));
    }

    if (empty($iniFiles[0])) {
        array_shift($iniFiles);
    }
    return $iniFiles;
}

function writeTmpIni(array $iniFiles)
{
    $tmpIni = sys_get_temp_dir().DIRECTORY_SEPARATOR.'tmp.ini';
    $content = '';
    $regex = '/^\s*(zend_extension\s*=.*xdebug.*)$/mi';
    $replace = in_array('--keep-xdebug', $_SERVER['argv']) ? '$1' : ';$1';

    foreach ($iniFiles as $file) {
        $data = preg_replace($regex, $replace, file_get_contents($file));
        $content .= $data.PHP_EOL;
    }

    if (defined('PHP_WINDOWS_VERSION_BUILD')) {
        if (in_array('--fix', $_SERVER['argv'])) {
            $content .= 'opcache.enable_cli=0'.PHP_EOL;
        }
    }

    file_put_contents($tmpIni, $content);
    return $tmpIni;
}

function showExtensionInfo()
{
    if (extension_loaded('zend opcache')) {
        $opcache = 'extension: opcache loaded';
        $opcache .= ', opcache.enable_cli='.ini_get('opcache.enable_cli');
    } else {
        $opcache = 'extension: opcache not loaded';
    }

    if (extension_loaded('xdebug')) {
        $xdebug = 'extension: xdebug loaded';
    } else {
        $xdebug = 'extension: xdebug not loaded';
    }
    echo $opcache, PHP_EOL, $xdebug, PHP_EOL;
}

Test script for Windows bug: https://bugs.php.net/bug.php?id=75886

Usage

Config: Enable opcache and xdebug extensions, set opcache.enable_cli=1

# Invoke crash
php.exe restart.php

# Avoid crash by applying user-land fix 
php.exe restart.php --fix

# Avoid crash by keeping xdebug loaded
php.exe restart.php --keep-xdebug