gistfile1.php

<?php

function makeClass($origClass) {
    $rc = new ReflectionClass($origClass);
    if($rc->isInterface()) {
        echo "Interface $origClass, skipped\n";
        return;
    }
    if($rc->isFinal()) {
        echo "FINAL $origClass, skipped\n";
        return;
    }
    if($rc->isAbstract()) {
        echo "ABSTRACT $origClass, skipped\n";
        return;
    }
    $ctor = $rc->getConstructor();
    if($ctor && $ctor->isFinal()) {
        echo "FINAL CTOR $origClass, skipped\n";
        return;
    }
    $badClassName = "BadClass_$origClass";
    $badclass = "class $badClassName extends $origClass { public function __construct() {} }";
    eval($badclass);
    $foo = new $badClassName();
    
    // These produce errors when called on uninitialized objects, so we exclude them
    // Luckily, producing error is OK for our case
    $badNames = [
        'DateTime::__wakeup', 'DateTimeImmutable::__wakeup', 'DatePeriod::__wakeup', 'DOMDocument::registerNodeClass','SplFileInfo::getPerms',
        "SplFileInfo::getInode",'SplFileInfo::getSize', "SplFileInfo::getOwner", "SplFileInfo::getGroup","SplFileInfo::getATime","SplFileInfo::getMTime",
         "SplFileInfo::getCTime", "SplFileInfo::getType", "SplFileInfo::isWritable",  "SplFileInfo::isReadable",  "SplFileInfo::isExecutable",
          "SplFileInfo::isFile",  "SplFileInfo::isDir",  "SplFileInfo::isLink",  "SplFileInfo::getFileInfo",  "SplFileInfo::openFile", 
          "FilesystemIterator::key","FilesystemIterator::current","RecursiveDirectoryIterator::getChildren",
          'GlobIterator::count', "SplFixedArray::setSize", "SessionHandler::open", "SessionHandler::close", "SessionHandler::read", "SessionHandler::write",
          "SessionHandler::destroy", "SessionHandler::gc", "SessionHandler::create_sid", 'ReflectionFunction::__toString', 'ReflectionFunction::isDisabled',
          'SoapServer::SoapServer',
    ];
    
    foreach($rc->getMethods(ReflectionMethod::IS_PUBLIC) as $rm) {
        $name = $rm->getDeclaringClass()->getName() . "::" . $rm->getName();
        if(in_array($name, $badNames)) {
            echo "SKIPPED: {$rc->getName()}::{$rm->getName()}\n";
            continue;
        }
        $args = [];
        foreach($rm->getParameters() as $param) {
            if($param->isOptional()) {
                continue;
            }
            if($param->allowsNull()) {
                $args[] = null;
                continue;
            }
            if($param->isArray()) {
                $args[] = [mt_rand()];
                continue;
            }
            $args[] = mt_rand(0, 1000);
        }
        var_dump($name, $args);
        flush();
        $obj = new $badClassName();
        try {
            $rm->invokeArgs($obj, $args);
        } catch(Exception $e) {
            echo $e;
        }
    }
}

$le = get_loaded_extensions();
sort($le);
foreach($le as $ext) {
    echo "\n===== $ext ====\n";
    if($ext == 'Reflection') continue;
    $re = new ReflectionExtension($ext);
    foreach($re->getClassNames() as $c) 
    { 
        makeClass($c);
    }
}

echo "\nDONE\n";